Publications by authors named "Renjie Li"

119 Publications

Intragastric Single-Port Surgery: An Innovative and Multipurpose Technique for the Therapy of Upper Digestive Tract Lesions.

Surg Innov 2021 Apr 29:15533506211015386. Epub 2021 Apr 29.

Center for Bariatric and Metabolic Surgery, 14959Klinikum Ernst von Bergmann, Academic Hospital of the Charité-Universitätsmedizin Humboldt University Berlin, Potsdam, Germany.

: Endoscopic treatment can represent a technical challenge for several special situations, such as resecting gastric tumors with larger size or in unfavorable sites and performing endoscopic retrograde cholangiopancreatography (ERCP) after Roux-en-Y gastric bypass (RYGB). This study aims to describe an innovative and multipurpose technique, intragastric single-port surgery (IGS), which can be applied for abovementioned special situations and for assessing its safety, feasibility, and efficacy. : IGS technique was performed through a 2-3 cm skin incision, where the stomach wall is exteriorized and fixed to the skin. The single-port device is inserted and intragastric access is gained for laparoscopic or endoscopic instruments. Three purposes of IGS were performed: (1). gastric intraluminal lesions resection; (2). to perform ERCP after RYGB; and (3). revision of pancreaticogastric anastomosis after pylorus-preserving pancreaticoduodenectomy. : IGS was performed successfully in 20 patients. Ten patients underwent gastric intraluminal lesion resection, mostly for gastric gastrointestinal stromal tumors (n = 7, 70%); all pathological specimens were with negative margin, mean operation time was 102.3 ± 43.5 minutes, and mean postoperative hospital stay was 4.6 ± 1.5 days. Nine patients underwent ERCP after RYGB, cleaning of the bile duct was successful in all patients (100%), and mean operation time and mean postoperative hospital stay were 140.6 ± 46.3 minutes and 4.4 ± 2.6 days, respectively. One patient underwent pancreaticogastric anastomosis revision. There were no mortalities in our series. : IGS is a safe, feasible, and effective technique for gastric intraluminal lesion resection and for performing ERCP after RYGB, while it has the potential for other future applications.
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http://dx.doi.org/10.1177/15533506211015386DOI Listing
April 2021

Endoscopic Sleeve Gastroplasty (ESG) for High-Risk Patients, High Body Mass Index (> 50 kg/m) Patients, and Contraindication to Abdominal Surgery.

Obes Surg 2021 Apr 27. Epub 2021 Apr 27.

Center for Bariatric and Metabolic Surgery, Klinikum Ernst von Bergmann, Charlottenstraße 72, 14467, Potsdam, Germany.

Background: For high-risk classified patients, patients with superobesity and in cases of contraindication to abdominal surgery, traditional bariatric surgery might lead to potential morbidity and mortality. Endoscopic sleeve gastroplasty (ESG) is a novel and effective bariatric therapy for morbidly obese patients. Our research group initially evaluated the safety, feasibility, and efficacy of ESG for high-risk, high body mass index (BMI) patients, and patients contraindicated to abdominal surgeries.

Methods: Eligible patients characterized as high-risk for bariatric surgery due to high-BMI, severe comorbidities, or impenetrable abdomen were prospectively documented. ESG was performed by using Overstich® (Apollo Endosurgery, Austin, TX, USA). Primary outcomes included technical success, post-procedure adverse events and mortality, and the change of weight and BMI.

Results: ESG was successfully performed for all patients (N = 24, mean age was 55.6 (± 9.2) years old, 75% male). Baseline weight and BMI were 157.9 (± 49.1) kg and 49.9 (± 14.4) kg/m. According to Edmonton Obesity Staging System (EOSS), 8 (33.3%), 14 (58.3%), and 2 (8.3%) patients were respectively classified as EOSS 2, 3, and 4. Mean operation time was 114.7 (± 26.0) min, without intraoperative complication. Weight loss, BMI reduction, %total weight loss (%TWL), and %excess weight loss (%EWL) were 17.5 (± 14.6) kg, 5.6 (± 4.6) kg/m, 12.2% (± 8.9%), and 29.1% (± 17.9%) at post-ESG 12-month, respectively. One (4.2%) moderate post-procedure adverse event (gastric mucosal bleeding) was observed.

Conclusions: ESG can be used as a safe, feasible, and effective option for the therapy of patients with superobesity, high-risk patients, and patients contraindicated to abdominal surgery. Graphical Abstract.
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http://dx.doi.org/10.1007/s11695-021-05446-2DOI Listing
April 2021

Formation of filamentous fungal pellets in aerobic granular sludge via reducing temperature and dissolved oxygen: Characteristics of filamentous fungi and denitrification performance.

Bioresour Technol 2021 Jul 26;332:125056. Epub 2021 Mar 26.

School of Civil Engineering, Southeast University, Nanjing 210096, China. Electronic address:

A lab-scale sequencing batch reactor (SBR) using glucose as carbon source was operated for 500 days to investigate the formation of filamentous organisms and their function on stability of AGS system. After 250 days' stable operation under conditions of 25 ± 2 °C and dissolved oxygen (DO) of 4-5 mg/L (stage I), the temperature and DO were reduced to 10 ± 2 °C and DO of 1-2 mg/L until 280 days (stage II), to induce the growth of filamentous microorganisms. After that until 500 days (stage III), overgrowth of filamentous microorganisms with relative abundances of up to 19.46%, formation of black filamentous fungal pellets, and reconstruction of AGS granules were observed in turn. The relation between settling of AGS (SVI 30-72 mL/g) and filamentous microorganisms was revealed. Filamentous pellets were purified and identified as fungal Bradymyces and Knufia, with stronger denitrification performance on nitrite than nitrate. The results indicated that filamentous fungal pellets contributed to good sludge settling performance and promoted the denitrification process in AGS.
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http://dx.doi.org/10.1016/j.biortech.2021.125056DOI Listing
July 2021

Porphyrin-Based Metal-Organic Frameworks for Efficient Photocatalytic H Production under Visible-Light Irradiation.

Inorg Chem 2021 Mar 1;60(6):3988-3995. Epub 2021 Mar 1.

Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.

Metal-organic frameworks (MOFs) are important photocatalytic materials for H production. To clarify the structure-function relationship and improve the photocatalytic activity, herein we explored a series of porphyrin-based zirconium MOFs (PCN-H/Pt, where : = 4:1, 3:2, 2:3, and 0:1) containing different ratios of HTCPP and PtTCPP [TCPP = tetrakis(4-carboxyphenyl)porphyrinate] as isostructural ligands and Zr clusters as nodes. Under visible-light irradiation, PCN-H/Pt shows the highest average H evolution reaction rate (351.08 μmol h g), which decreases along with lowering of the ratio of PtTCPP in the PCN-H/Pt series. The differences in photocatalytic activity are attributed to more uniformly dispersed Pt ions in PCN-H/Pt, which promotes charge transfer from porphyrins (photosensitizers) to Pt ions (catalytic centers), leading to efficient charge separation in the MOF materials. The bifunctional MOFs with photosensitizers and catalytic centers provide new insight for the design and application of porphyrin-based photocatalytic systems for visible-light-driven H production.
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http://dx.doi.org/10.1021/acs.inorgchem.1c00041DOI Listing
March 2021

Comparison of clinical outcomes and spino-pelvic sagittal balance in degenerative lumbar spondylolisthesis: Minimally invasive oblique lumbar interbody fusion (OLIF) versus transforaminal lumbar interbody fusion (TLIF).

Medicine (Baltimore) 2021 Jan;100(3):e23783

Department of Orthopaedics, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, Jiangsu Province 215006, China.

Abstract: Spino-pelvic sagittal parameters are closely related to the lumbar degenerative diseases. The present study aims to compare clinical results and spino-pelvic sagittal balance treated with oblique lumbar interbody fusion (OLIF) and transforaminal lumbar interbody fusion (TLIF) in patients with degenerative lumbar spondylolisthesis at single segment.We retrospectively reviewed and compared 28 patients who underwent OLIF (OLIF group) and 35 who underwent TLIF (TLIF group). Radiological results were evaluated with disc height (DH), foraminal height (FH), fused segment lordosis (FSL), lumbar lordosis (LL), pelvic tilt (PT), pelvic incidence (PI), and sacral slope (SS). Clinical results were evaluated with the Oswestry Disability Index (ODI) and VAS for back and leg pain.The OLIF group showed higher improvement of DH and FH than the TLIF group at all time points after surgery (P < .05). No significant differences were found in PT, PI, and SS between the 2 groups (P > .05). Significant restoration of spino-pelvic sagittal balance was observed in the 2 groups after surgery. Significant differences in postoperative lumbar lordosis and fused segment lordosis were found between the 2 groups (P < .05). Significant difference in the improvement of symptoms was observed between the 2 groups. The OLIF group had lower VAS scores for back pain and ODI compared after surgery (P < .05).It can be concluded that there are exactly differences in improvement of radiographic parameters between 2 approaches, which confirmed that OLIF is better in restoring spinal alignment. Besides, due to the unique minimally invasive approach, OLIF did exhibit a greater advantage in early recovery after surgery.
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http://dx.doi.org/10.1097/MD.0000000000023783DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7837863PMC
January 2021

Identification of a new myotropic decapeptide from the skin secretion of the red-eyed leaf frog, Agalychnis callidryas.

PLoS One 2020 3;15(12):e0243326. Epub 2020 Dec 3.

Chemical Biology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China.

Bradykinin-related peptides (BRPs) family is one of the most significant myotropic peptide families derived from frog skin secretions. Here, a novel BRP callitide was isolated and identified from the red-eyed leaf frog, Agalychnis callidryas, with atypical primary structure FRPAILVRPK-NH2. The mature peptide was cleaved N-terminally at a classic propeptide convertase cleavage site (-KR-) and at the C-terminus an unusual -GKGKGK sequence was removed using the first G residue as an amide donor for the C-terminally-located K residue. Thereafter, the synthetic replicates of callitide were assessed the myotropic activity and showed a significant contraction of balder, with the 0.63 nM EC50 value, more potent than most discovered myotropic peptides. The binding mode was further speculated by molecular docking and stimulation. The result indicated that the C-terminal of callitide might selectively bind to bradykinin receptor B2 (BKRB2). Further investigation of the callitide needs to be done in the future to be exploited as potential future drug leads.
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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0243326PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7714090PMC
January 2021

Retroperitoneal Extragastrointestinal Stromal Tumors Have a Poor Survival Outcome: A Multicenter Observational Study.

Cancer Manag Res 2020 23;12:10491-10504. Epub 2020 Oct 23.

Department of General Surgery, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, People's Republic of China.

Purpose: Gastrointestinal stromal tumors (GISTs) are commonly known to be derived from the gastrointestinal (GI) tract, but recently there have been more and more literature describing lesions with similar pathological and immunohistochemical resembling GISTs but located outside the GI tract, and they have been termed as extra-GISTs (eGISTs). However, due to the rare incidence of eGISTs, its association with survival outcomes is poorly understood, especially in the Chinese population. Here, we aimed to identify the risk factors of eGISTs and to assess their association with overall survival (OS) and disease-free survival (DFS).

Patients And Methods: Data of pathologically confirmed eGISTs cases, without radiological and perioperative evidence of other primary lesions, and with no microscopically identified adhesion between the tumor and the gastrointestinal serosa, which were surgically treated between January 2006 and September 2017 were retrieved from the database of four high-volume hospitals. Immunohistochemical and genetic testing were performed on the postoperative lesions and were staged using the National Institutes of Health (NIH) criteria.

Results: A total of 55 cases were retrieved. eGISTs were identified from the retroperitoneum (36.4%), mesocolon (25.5%), small bowel mesentery (12.7%), abdominopelvic cavity (12.7%), lesser omental sac (5.5%), ovary (3.6%), pancreatic capsule (1.8%), or urinary bladder (1.8%). Based on the NIH risk classification, majority of the lesion were classified as high risk (85.5%). was the most common mutation site (76.5%) and 25.0% of the cases were wild-type eGISTs. Multivariate analyses showed that tumor location and size were independent factors affecting prognoses. Patients with tumors in the retroperitoneum had significantly poorer OS and DFS as compared to those in the non-retroperitoneum (HR [95% CI] for OS and DFS: 2.546 [1.023-6.337] [ = 0.037] and 2.475 [0.975-6.273] [ = 0.049], respectively). Similar findings were found for tumors of size >15 cm, compared to ≤15 cm (HR [95% CI] for OS and DFS: 5.350 [2.022-14.156] [ < 0.001] and 3.861 [1.493-9.988] [ = 0.003], respectively).

Conclusion: eGISTs were predominantly found from the retroperitoneum and mostly classified as high risk. Those located in the retroperitoneum and of size >15 cm had the poorer OS and DFS as compared to those in the non-retroperitoneum and of size <15 cm.
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http://dx.doi.org/10.2147/CMAR.S278612DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7591066PMC
October 2020

One-pot biocatalytic route from cycloalkanes to α,ω-dicarboxylic acids by designed Escherichia coli consortia.

Nat Commun 2020 10 7;11(1):5035. Epub 2020 Oct 7.

State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, 430062, Wuhan, P. R. China.

Aliphatic α,ω-dicarboxylic acids (DCAs) are a class of useful chemicals that are currently produced by energy-intensive, multistage chemical oxidations that are hazardous to the environment. Therefore, the development of environmentally friendly, safe, neutral routes to DCAs is important. We report an in vivo artificially designed biocatalytic cascade process for biotransformation of cycloalkanes to DCAs. To reduce protein expression burden and redox constraints caused by multi-enzyme expression in a single microbe, the biocatalytic pathway is divided into three basic Escherichia coli cell modules. The modules possess either redox-neutral or redox-regeneration systems and are combined to form E. coli consortia for use in biotransformations. The designed consortia of E. coli containing the modules efficiently convert cycloalkanes or cycloalkanols to DCAs without addition of exogenous coenzymes. Thus, this developed biocatalytic process provides a promising alternative to the current industrial process for manufacturing DCAs.
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http://dx.doi.org/10.1038/s41467-020-18833-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7542165PMC
October 2020

Role of CFD based in silico modelling in establishing an in vitro-in vivo correlation of aerosol deposition in the respiratory tract.

Adv Drug Deliv Rev 2021 03 22;170:369-385. Epub 2020 Sep 22.

School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia. Electronic address:

Effective evaluation and prediction of aerosol transport deposition in the human respiratory tracts are critical to aerosol drug delivery and evaluation of inhalation products. Establishment of an in vitro-in vivo correlation (IVIVC) requires the understanding of flow and aerosol behaviour and underlying mechanisms at the microscopic scale. The achievement of the aim can be facilitated via computational fluid dynamics (CFD) based in silico modelling which treats the aerosol delivery as a two-phase flow. CFD modelling research, in particular coupling with discrete phase model (DPM) and discrete element method (DEM) approaches, has been rapidly developed in the past two decades. This paper reviews the recent development in this area. The paper covers the following aspects: geometric models of the respiratory tract, CFD turbulence models for gas phase and its coupling with DPM/DEM for aerosols, and CFD investigation of the effects of key factors associated with geometric variations, flow and powder characteristics. The review showed that in silico study based on CFD models can effectively evaluate and predict aerosol deposition pattern in human respiratory tracts. The review concludes with recommendations on future research to improve in silico prediction to achieve better IVIVC.
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http://dx.doi.org/10.1016/j.addr.2020.09.007DOI Listing
March 2021

Maternal transmission of the epigenetic 'memory of winter cold' in Arabidopsis.

Nat Plants 2020 10 21;6(10):1211-1218. Epub 2020 Sep 21.

Shanghai Center for Plant Stress Biology & National Key Laboratory of Plant Molecular Genetics, Chinese Academy of Sciences Center for Excellence in Molecular Plant Sciences, Shanghai, China.

Some plants can 'remember' past environmental experience to become adapted to a given environment. For instance, after experiencing prolonged low-temperature exposure in winter (winter cold), vernalization-responsive plants remember past cold experience when temperature rises in spring, to acquire competence to flower at a later season favourable for seed production. In Arabidopsis thaliana, prolonged cold induces silencing of the potent floral repressor FLOWERING LOCUS C (FLC) by Polycomb group (PcG) chromatin modifiers. This Polycomb-repressed chromatin state is epigenetically maintained and thus 'memorized' in subsequent growth and development upon return to warmth. 'Memory of winter cold' has been viewed as being mitotically stable but meiotically unstable, and thus not to be transmitted intergenerationally. In general, whether and how chromatin-mediated environmental memories are transmitted across generations are unknown in plants. Here, we show that the cold-induced Polycomb-repressed chromatin state at FLC or memory of winter cold is maintained in the egg cell, that is meiotically stable in the process of female gamete formation, and provide evidence that this Polycomb-mediated memory is not maintained in the sperm cell. Moreover, we show that this cold memory is inherited maternally but not paternally to the zygote and early embryos. Our study demonstrates and further provides mechanistic insights into intergenerational transmission of chromatin state-mediated environmental memories in plants.
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http://dx.doi.org/10.1038/s41477-020-00774-0DOI Listing
October 2020

Facile preparation of recyclable magnetic Ni@filter paper composite materials for efficient photocatalytic degradation of methyl orange.

J Colloid Interface Sci 2021 Jan 11;582(Pt A):291-300. Epub 2020 Aug 11.

Zhejiang Keran Environ Shares-Tech Co. Ltd., 130 Binhe Road, Jinhua 321004, PR China. Electronic address:

Photocatalytic materials have been widely used to remove dyes from printing and dyeing wastewater. However, difficulty in recycling of photocatalysts is the great concern in the real catalytic applications, which significantly raises the application cost. This study developed a low-cost catalyst by loading magnetic Ni onto filter paper (FP) via an easy going in-situ reaction. The characterization results displayed that the Ni particles were uniformly anchored onto the FP. The Ni@FP material presented a strong magnetic ability which was evidenced by a saturation magnetization (Ms) of 5.014 emu·g, a remanent magnetization (Mr) of 2.067 emu·g and a coercivity (Hc) of 133.868 Oe. Meanwhile, the magnetic Ni@FP material displayed a recyclable advantage in photocatalytic degradation of methyl orange (MO) via an external magnetic field. There existed an optimal photocatalytic degradation rate of 93.40% within 5 min when MO concentration was 15 mg·L at pH 8.0. Three cycle experiments confirmed that the Ni@FP possessed a satisfied stability and recycling ability. Moreover, the Ni@FP material presented a strong antibacterial activity which can prevent it from being contaminated by microorganisms. The versatility of the newly proposed photocatalyst in this study demonstrated its great application prospect in dyeing wastewater treatment.
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http://dx.doi.org/10.1016/j.jcis.2020.08.023DOI Listing
January 2021

Intragastric single-port surgery (IGS) for gastric endophytic gastrointestinal stromal tumor (GIST): A novel surgical treatment.

Surg Oncol 2020 Dec 23;35:12-13. Epub 2020 Jul 23.

Center for Bariatric and Metabolic Surgery, Klinikum Ernst von Bergmann, Potsdam, Germany. Electronic address:

Background: Intragastric surgery with a single incision has been performed for several diseases, such as gastric tumors[1] and pancreatic pseudocyst[2], safety, feasibility and potential benefits of which have been reported in previous relevant studies[3].

Methods: The video shows a 65-year-old man with upper gastrointestinal hemorrhage, preoperative abdominal CT scan and endoscopy suggested an endophytic tumor located in gastric corpus, suggesting gastrointestinal stromal tumor (GIST). Intragastric single-port surgery (IGS) was indicated.

Results: Under general anesthesia, patient was placed in supine position. Surgeons stood on the right side of the patient. After a 2.5cm transverse incision was made on left upper abdominal wall, gastric anterior wall was exteriorized and fixed to the skin incision. Single-port device was inserted inside the stomach after anterior gastric wall was opened. Next, laparoscope was introduced into gastric cavity and identified the location of tumor. Full thickness resection of the tumor was performed by using linear stapler, then stapler line was embedded with continuous sutures. Finally, after specimen and single-port device removal, the stomach incision was closed extracorporeally. The operation time was 112 minutes. Final pathology confirmed GIST (4.5cm) with negative margins and patient discharged after 4 days, without postoperative complications. In 1-year follow-up time, without recurrence or death.

Conclusion: IGS is safe and effective for gastric endophytic GIST resection, which not only preserves all advantages of conventional laparoscopic operation, but also includes other benefits like obviating the need of abdominal cavity exploration, potential reduction of risk of neoplasm seeding, and offering good postoperative cosmetic result.
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http://dx.doi.org/10.1016/j.suronc.2020.06.001DOI Listing
December 2020

Quasi-Heteroface Perovskite Solar Cells.

Small 2020 Aug 22;16(34):e2002887. Epub 2020 Jul 22.

Institute of Photoelectronic Thin Film Devices and Technology of Nankai University, Tianjin, 300350, P. R. China.

Perovskite solar cells (PSCs) have attracted unprecedented attention due to their rapidly rising photoelectric conversion efficiency (PCE). In order to further improve the PCE of PSCs, new possible optimization path needs to be found. Here, quasi-heteroface PSCs (QHF-PSCs) is designed by a double-layer perovskite film. Such brand new PSCs have good carrier separation capabilities, effectively suppress the nonradiative recombination of the PSCs, and thus greatly improve the open-circuit voltage and PCE. The root cause of the performance improvement is the benefit from the additional built-in electric field, which is confirmed by measuring the external quantum efficiency under applied electric field and Kelvin probe force microscope. Meanwhile, an intermediate band gap perovskite layer can be obtained simply by combining a wide band gap perovskite layer with a narrow band gap perovskite layer. Tunability of the band gap is obtained by varying the film thicknesses of the narrow and wide band gap layers. This phenomenon is quite different from traditional inorganic solar cells, whose band gap is determined only by the narrowest band gap layer. It is believed that these QHF-PSCs will be an effective strategy to further enhance PCE in PSCs and provide basis to further understand and develop the perovskite materials platform.
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http://dx.doi.org/10.1002/smll.202002887DOI Listing
August 2020

Characteristics of Liver Function in Patients With SARS-CoV-2 and Chronic HBV Coinfection.

Clin Gastroenterol Hepatol 2021 03 15;19(3):597-603. Epub 2020 Jun 15.

Department of Epidemiology and Biostatistics, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. Electronic address:

Background & Aims: Coronavirus disease 2019 (COVID-19) is a major global health threat. We aimed to describe the characteristics of liver function in patients with SARS-CoV-2 and chronic hepatitis B virus (HBV) coinfection.

Methods: We enrolled all adult patients with SARS-CoV-2 and chronic HBV coinfection admitted to Tongji Hospital from February 1 to February 29, 2020. Data of demographic, clinical characteristics, laboratory tests, treatments, and clinical outcomes were collected. The characteristics of liver function and its association with the severity and prognosis of disease were described.

Results: Of the 105 patients with SARS-CoV-2 and chronic HBV coinfection, elevated levels of liver test were observed in several patients at admission, including elevated levels of alanine aminotransferase (22, 20.95%), aspartate aminotransferase (29, 27.62%), total bilirubin (7, 6.67%), gamma-glutamyl transferase (7, 6.67%), and alkaline phosphatase (1, 0.95%). The levels of the indicators mentioned above increased substantially during hospitalization (all P < .05). Fourteen (13.33%) patients developed liver injury. Most of them (10, 71.43%) recovered after 8 (range 6-21) days. Notably the other, 4 (28.57%) patients rapidly progressed to acute-on-chronic liver failure. The proportion of severe COVID-19 was higher in patients with liver injury (P = .042). Complications including acute-on-chronic liver failure, acute cardiac injury and shock happened more frequently in patients with liver injury (all P < .05). The mortality was higher in individuals with liver injury (28.57% vs 3.30%, P = .004).

Conclusion: Liver injury in patients with SARS-CoV-2 and chronic HBV coinfection was associated with severity and poor prognosis of disease. During the treatment of COVID-19 in chronic HBV-infected patients, liver function should be taken seriously and evaluated frequently.
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http://dx.doi.org/10.1016/j.cgh.2020.06.017DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7294291PMC
March 2021

An inverse opal CuNbO anode for high-performance Li storage.

Chem Commun (Camb) 2020 Jul 1;56(53):7321-7324. Epub 2020 Jun 1.

Institute of Materials for Energy and Environment, School of Materials Science and Engineering, Qingdao University, Qingdao 266071, China.

CuNbO with an inverse opal morphology is fabricated, showing highly-ordered macropores with sizes of ∼170 nm and walls with thicknesses of 20-30 nm. This first-reported CuNbO nanomaterial exhibits good Li-storage properties, including a large capacity, safe operating potential, large initial coulombic efficiency, high rate performance and good cycling stability.
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http://dx.doi.org/10.1039/d0cc02016hDOI Listing
July 2020

Membrane fouling caused by biological foams in a submerged membrane bioreactor: Mechanism insights.

Water Res 2020 Aug 18;181:115932. Epub 2020 May 18.

Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua, 321004, China.

Though sludge foaming often occurs and thus causes serious membrane fouling in membrane bioreactors (MBRs), the fouling mechanisms related with the foaming phenomenon have not been well addressed, hindering better understanding and solving foaming problem. In this work, it was interestingly found that, the foulants during the foaming period possessed extremely high specific filtration resistance (SFR) (over 10 m kg) and strong adhesion ability to membrane surface. Chemical characterization showed that the proteins (178.57 mg/L) and polysaccharides (209.21 mg/L) in the foaming sample were about 6.4 times and 5.4 times of those in the supernatant sample, suggesting existence of a mechanism permitting continuous production of these foulants in the MBR during the foaming period. It was revealed that the fouling caused by foams was associated with gel layer filtration process, and the extremely high SFR can be interpreted by chemical potential change in the gel filtration process depicted in Flory-Huggins theory. Meanwhile, analyses by the extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory showed that the strong adhesion ability stemmed from the high interaction energy between the foaming foulants and membrane surface. In addition, 16S rDNA gene sequencing identified that the abundance of the foaming related bacteria species in the sludge suspension during the foaming period was more than 10 times of that during the non-foaming period. This study offered new mechanism insights into foaming fouling in MBRs.
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http://dx.doi.org/10.1016/j.watres.2020.115932DOI Listing
August 2020

Polymeric Membranes Incorporated With ZnO Nanoparticles for Membrane Fouling Mitigation: A Brief Review.

Front Chem 2020 8;8:224. Epub 2020 Apr 8.

College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, China.

Due to the flexibility of operation, high removal ability, and economic cost, separation membranes have proved to be one of the most significant technologies in various aspects including water treatment. However, membrane fouling is a predominant barrier which is severely limiting the whole membrane industry. To mitigate membrane fouling, researchers have carried out several modification strategies including the incorporation of hydrophilic inorganic components. Zinc oxide (ZnO) nanoparticles, known as a low-cost, environment-friendly, and hydrophilic inorganic material, have been used by worldwide researchers. As claimed by the scientific literatures, ZnO nanoparticles can not only endow the polymeric membranes with antifouling performance but also supply a photocatalytic self-cleaning ability. Therefore, polymer-ZnO composite membranes were considered to be an attractive hot topic in membrane technology. In the last decades, it has been significantly matured by a large mass of literature reports. The current review highlights the latest findings in polymeric membranes incorporated with ZnO nanoparticles for membrane fouling mitigation. The membrane fouling, ZnO nanoparticles, and modification technology were introduced in the first three sections. Particularly, the review makes a summary of the reports of polyvinylidene fluoride (PVDF)-ZnO composite membranes, polyethersulfone (PES)-ZnO composite membranes, and other composite membranes incorporated with ZnO nanoparticles. This review further points out several crucial topics for the future development of polymer-ZnO composite membranes.
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http://dx.doi.org/10.3389/fchem.2020.00224DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7156636PMC
April 2020

Measuring multi-spatiotemporal scale tourist destination popularity based on text granular computing.

PLoS One 2020 9;15(4):e0228175. Epub 2020 Apr 9.

Institute of Geographical Sciences, Shijiazhuang, Hebei, China.

User-generated content (UGC) is an important data source for tourism GIScience research. However, no effective approach exists for identifying hidden spatiotemporal patterns within multi-scale unstructured UGC. Therefore, we developed an algorithm to measure the tourist destination popularity (TDP) based on a multi-spatiotemporal text granular computing model, called TDPMTGC. To accurately granulate the spatial and temporal information of tourism text, tourism text data granules are used to represent landscape objects. These granules are unified objects that possess multiple attributes, such as spatial and temporal dimensions. The multi-spatiotemporal scales are characterized by the multi-hierarchical structure of granular computing, and transformations of granular layers and data granule size are achieved by scale selection in the spatial and temporal dimensions. Therefore, all scales between the spatial and temporal dimension are related, which allows for the comparability of the data granules of all spatial-spatial, temporal-temporal and spatial-temporal layers. This approach achieves a quantitative description and comparison of the popularity value of granules between adjacent scales and cross-scales. Therefore, the TDP with multi-spatiotemporal scales can be deduced and calculated in a systematic framework. We first introduce the conceptual framework of TDPMTGC to construct a quantitative measurement model of TDP at multi-spatiotemporal scales. Then, we present a dataset construction approach to support multi-spatiotemporal scale granular reorganization. Finally, TDPMTGC is derived to describe both the TDP at a single spatial or temporal scale and the patterns and processes of the TDP at multi-spatiotemporal scales. A case study from Jiuzhaigou shows that the TDP derived using TDPMTGC is consistent with the conclusions of existing studies. More importantly, TDPMTGC provides additional detailed characteristics, such as the contributions of different scenic spots in a tourist route or scenic area, the monthly anomalies and daily contributions of TDP in a specific year, the distinct weakening of tourist route scale in tourist cognition, and the daily variations of TDP during in-season and off-season times. This is the first time that a granular computing model has been introduced to tourism GIScience that provides a feasible scheme for reorganizing large-scale unstructured text and constructing public spatiotemporal UGC tourism datasets. TDPMTGC constitutes a new approach for exploring tourist behaviors and the driving mechanisms of tourism patterns and processes.
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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0228175PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7145151PMC
July 2020

In-situ coating TiO surface by plant-inspired tannic acid for fabrication of thin film nanocomposite nanofiltration membranes toward enhanced separation and antibacterial performance.

J Colloid Interface Sci 2020 Jul 24;572:114-121. Epub 2020 Mar 24.

College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China. Electronic address:

A major issue hindering development of thin film nanocomposite (TFN) nanofiltration (NF) membrane is the interfacial defects induced by nanomaterial aggregation in top layer. Although various nanomaterials surface modification strategies have been developed to eliminate the interfacial defects, they usually involve extra modification steps and complex post-treatments. Inspired by the substrate-independent coating ability of tannic acid (TA) and the fact that the phenolic hydroxyl groups in TA can react with acyl chloride group in trimesoyl chloride, a TA coating solution containing TiO nanoparticles was used as an aqueous phase of interfacial polymerization to prepare interfacial modified TFN NF membranes in this study. Surface modification of TiO nanoparticles and interfacial polymerization can be carried out in a single step without any extra pre-modification step. It was found that the TA coating on TiO nanoparticles surface could decrease TiO aggregations and enhance interfacial compatibility between TiO and polyester matrix. The TFN NF membrane prepared at a TiO loading of 0.020 wt% exhibited a pure water flux of 28.8 L m h (284% higher than that of the controlled TFC membrane), and possessed enhanced NaCl and NaSO rejections of 57.9% and 94.6%, respectively, breaking through the trade-off between permeability and selectivity.
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http://dx.doi.org/10.1016/j.jcis.2020.03.087DOI Listing
July 2020

Development and Application of Oblique Lumbar Interbody Fusion.

Orthop Surg 2020 Apr 15;12(2):355-365. Epub 2020 Mar 15.

Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Suzhou, China.

The present study reviewed the relevant recent literature regarding the development and application of oblique lumbar interbody fusion (OLIF), with a particular focus on its application and associated complications. The study evaluated the rationality of this technique and demonstrated the direction of future research by collecting data on previous operative outcomes and complications. A literature search was performed in Pubmed and Web of Science, including the following keywords and abbreviations: anterior lumbar interbody fusion (ALIF), lateral lumbar interbody fusion (LLIF), direct lateral interbody fusion (DLIF), extreme lateral interbody fusion (XLIF), oblique lateral interbody fusion (OLIF), adjacent segment disease (ASD), and adult degenerative scoliosis (ADS). A search of literature published from January 2005 to January 2019 was conducted and all studies evaluating development and application of OLIF were included in the review. According to the literature, the indications for OLIF are various. OLIF has excellent orthopaedic effects in degenerative scoliosis patients and the incidence of bony fusion is higher than for other approaches. It also provides a better choice for revision surgery. It has various advantages in many aspects, but the complications cannot be ignored. As a new minimally invasive technique, the advantages of OLIF are obvious, but further evaluation is needed to compare its operation-related data with that of traditional open surgery. In addition, more prospective studies are required to compare minimally invasive and open spinal surgery to confirm its specific efficacy, risk, advantages, learning curve, and ultimate clinical efficacy.
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http://dx.doi.org/10.1111/os.12625DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7967883PMC
April 2020

Magnetic field assisted arrangement of photocatalytic TiO particles on membrane surface to enhance membrane antifouling performance for water treatment.

J Colloid Interface Sci 2020 Jun 4;570:273-285. Epub 2020 Mar 4.

College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, PR China. Electronic address:

Fabrication of membranes with high antifouling and self-cleaning ability is a long-term pursuit of research community. For this purpose, the current work proposed a strategy to use an external magnetic field to arrange the magnetic TiO@Ni particles (MNPs) onto the polymeric polyether sulfone (PES) membrane surface. The characterization results clearly indicated that the MNPs were successfully embedded onto the membrane surface instead of uniformly distributing into the membrane bulk. Because of this superficial distribution, the prepared composite membrane exhibited a flux of 871.2 ± 2.9 L·m·h·bar, which was 5 times flux of the pristine PES membrane. Meanwhile, it remained a rejection of 95.85% bovine serum albumin (BSA), which was also better than that of the pristine PES membrane. The cycle filtration experiments verified that the composite membrane possessed promoted antifouling ability for filtrating BSA, yeast extract fermentation (YEF), ammonium alginate (SA) and humic acid (HA) solutions. The antifouling mechanism was analyzed by the total interaction energies (ΔG), which were quantitatively evaluated by using the extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory. Moreover, it was interestingly found that the composite membrane possessed a self-cleaning property under radiation of UV light and sunlight. The optimal membrane after self-cleaning presented flux recovery ratio (FRR) of 75.4%, 99.56%, 92.11% and 98.26% for BSA, YEF, SA and HA solutions, respectively. This work demonstrated a novel way to fabricate membranes with high antifouling and self-cleaning ability for water treatment.
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http://dx.doi.org/10.1016/j.jcis.2020.03.008DOI Listing
June 2020

Inkjet printing assisted fabrication of polyphenol-based coating membranes for oil/water separation.

Chemosphere 2020 Jul 17;250:126236. Epub 2020 Feb 17.

College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, PR China. Electronic address:

While polyphenol-based coating has been regarded as a promising alternative to functionalize membrane surface, it usually suffers from problems of low-efficient procedure and low utilization rate of the polyphenolic compounds, hindering its large-scale implementations. To solve these problems, this study provided a first report on inkjet printing of polyphenols (catechol (CA) or tannic acid (TA)) and sodium periodate (SP) on a polyvinylidene fluoride (PVDF) membrane to improve membrane performance. A series of analyses showed the efficient formation of homogenous films on the PVDF membrane surface and the improvement of hydrophilicity by the inkjet printing technique. The PVDF membranes decorated with the optimized polyphenolic coating exhibited a promising oil/water separation efficiency (higher than 99%) with a high average water permeation flux of 5.2 times higher than that of the pristine membrane. Meanwhile, the modified membranes illustrated a good stability under acidic conditions (pH = 2-7). The novel method proposed in this study is facile, cost-saving and environment-friendly. The advantages of the proposed method and the modified membranes demonstrated the great significance of the proposed method in practical applications.
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http://dx.doi.org/10.1016/j.chemosphere.2020.126236DOI Listing
July 2020

Magnetic field assisted preparation of PES-Ni@MWCNTs membrane with enhanced permeability and antifouling performance.

Chemosphere 2020 Mar 25;243:125446. Epub 2019 Nov 25.

College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, PR China. Electronic address:

Multiple wall carbon nanotubes (MWCNTs), as an excellent material, have been used in various applications including preparation of polymer-MWCNTs composite membranes. However, few reports have combined the magnetic Ni@MWCNTs with polyether sulfone (PES) membrane to improve its antifouling performance to humic acid (HA), sodium alginate (SA), bovine serum albumin (BSA) and yeast (YE) solutions. In this study, the Ni@MWCNTs was generated by immersing MWCNTs into Ni solution where in-situ reduction reaction was launched by the adsorbed Ag on MWCNTs. Since the loaded Ni endowed magnetism to MWCNTs, the Ni@MWCNTs can be easily attracted onto the membrane surface by an external magnetic field during the phase inversion process. The morphology measurements confirmed that the Ni@MWCNTs headed out of the PES-Ni@MWCNTs membrane surface. Because the MWCNTs played a role of free channels for water molecules, the composite membrane water flux reached to threefold flux of the pristine membrane. Moreover, the PES-Ni@MWCNTs membranes displayed the obviously enhanced antifouling ability during all the three alternative filtration cycles of water and BSA, SA, YE and HA solutions. In addition, the optimal PES-Ni@MWCNTs membrane demonstrated a flux recovery rate (FRR) of 67.89%, 85.53%, 60.28 and 90.12% for BSA, SA, YE and HA, respectively, which were not only much higher than that of the pristine membrane, but also exhibited significant improvements comparing with the previous studies. Further results of extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory indicated that the modified membrane possessed advantageous interaction energies with contaminant molecules over the pristine membrane.
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http://dx.doi.org/10.1016/j.chemosphere.2019.125446DOI Listing
March 2020

Inkjet printing assisted electroless Ni plating to fabricate nickel coated polypropylene membrane with improved performance.

J Colloid Interface Sci 2020 Apr 20;565:546-554. Epub 2020 Jan 20.

College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, PR China. Electronic address:

While electroless nickel plating is considered as a promising candidate for fabrication of metallized polymer composite membranes with high performance, it suffers from problems of complex and high-cost pretreatment procedure, hindering its large-scale implementations. It is hypothesized that, inkjet printing integrated with electroless plating (ELP) can serve as a facile and economical membrane fabrication method to overcome above problems. The new method proposed in this study was processed by inkjet printing silver ions and pyrrole inks as catalytic layer followed by electroless Ni deposition on polypropylene (PP) membrane surface. Successful modification was verified by characterizing the surface morphology and elemental compositions of the membranes. In comparison to the pristine PP membrane, the PPy-Ag/Ni modified membrane demonstrated lower surface resistance (2.3 Ω), better hydrophilicity (44.9°) and higher pure water flux (1135.1 L m h). When applying an external electric field (10.0 V cm), the average flux of the PPy-Ag/Ni membrane for yeast filtration increased from 107.8 to 137.7 L m h, which was about 2.0 times higher than that of the pristine PP membrane. Meanwhile, the PPy-Ag/Ni membrane possessed a maximum flux recover rate when applied with an external electrical field. This work provided a facile and efficient approach for fabrication of composite conductive membranes.
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http://dx.doi.org/10.1016/j.jcis.2020.01.069DOI Listing
April 2020

Manipulating the mussel-inspired co-deposition of tannic acid and amine for fabrication of nanofiltration membranes with an enhanced separation performance.

J Colloid Interface Sci 2020 Apr 3;565:23-34. Epub 2020 Jan 3.

College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China. Electronic address:

Nanofiltration (NF) membranes with tannic acid (TA) based selective layers have been intensively studied in recent years, but they still suffer from poor inorganic salt rejection. This study provided a first report on mussel-inspired co-deposition of TA and amine to obtain high-performance NF membranes. The inorganic salt separation performance of the as-prepared NF membrane was significantly improved by optimising the amine molecular weight. The membranes prepared by TA and various amines were characterised by X-ray photoelectron spectroscopy (XPS), attenuated total reflectance Fourier transform infrared (ATR-FTIR), scanning electron microscopy (SEM), zeta potential, and water contact angle measurement. It was found that amines with low molecular weight, such as ethylenediamine (EDA) and diethylenetriamine (DETA) facilitated the co-deposition onto the membrane surface, while polyethylene polyamine (PEPA) and branched polyethylenimine 600 (PEI600) enhanced the precipitation in solution. The TA/DETA co-deposited membrane showed an MgCl rejection of 83.5% and a pure water permeance of 4.5 L m h bar. The rejection was higher than the reported TA based NF membranes in the literature. In addition to demonstrating a TA based NF membrane with the improved inorganic salt rejection, this study provided new insights into the mussel-inspired co-deposition for material surface engineering towards various applications.
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http://dx.doi.org/10.1016/j.jcis.2020.01.004DOI Listing
April 2020

Quantification of interfacial energies associated with membrane fouling in a membrane bioreactor by using BP and GRNN artificial neural networks.

J Colloid Interface Sci 2020 Apr 7;565:1-10. Epub 2020 Jan 7.

College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China. Electronic address:

Interfacial energy between sludge foulants and rough membrane surface critically determines adhesive fouling in membrane bioreactors (MBRs). As a current available method, the advanced extensive Derjaguin-Landau-Verwey-Overbeek (XDLVO) approach cannot efficiently quantify the interfacial energy. In this study, novel methods including back propagation (BP) artificial neural network (ANN) and generalized regression neural network (GRNN) were proposed to quantify the interfacial energy associated with the membrane fouling in an MBR. Different levels of 5 apparent input factors and the resulted interfacial energies were used as training and testing databases for establishment of ANN models. The established BP ANN and GRNN models exhibited high regression coefficients and accuracies, suggesting the high capacity of ANN models to capture the complicated non-linear mapping relations between interfacial energy and various factors. As compared with the advanced XDLVO approach, both BP ANN and GRNN showed remarkably improved quantification efficiency. Meanwhile, BP ANN showed better prediction performance than GRNN model. Case study further demonstrated the robustness and feasibility of BP ANN for interfacial energy quantification. This study provided a new approach to quantify interfacial energy associated with membrane fouling.
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http://dx.doi.org/10.1016/j.jcis.2020.01.003DOI Listing
April 2020

Gradient Energy Alignment Engineering for Planar Perovskite Solar Cells with Efficiency Over 23.

Adv Mater 2020 Feb 3;32(6):e1905766. Epub 2020 Jan 3.

Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin, 300350, P. R. China.

An electron-transport layer (ETL) with appropriate energy alignment and enhanced charge transfer is critical for perovskite solar cells (PSCs). However, interfacial energy level mismatch limits the electrical performance of PSCs, particularly the open-circuit voltage (V ). Herein, a simple low-temperature-processed In O /SnO bilayer ETL is developed and used for fabricating a new PSC device. The presence of In O results in uniform, compact, and low-trap-density perovskite films. Moreover, the conduction band of In O is shallower than that of Sn-doped In O (ITO), enhancing the charge transfer from perovskite to ETL, thus minimizing V loss at the perovskite and ETL interface. A planar PSC with a power conversion efficiency of 23.24% (certified efficiency of 22.54%) is obtained. A high V of 1.17 V is achieved with the potential loss at only 0.36 V. In contrast, devices based on single SnO layers achieve 21.42% efficiency with a V of 1.13 V. In addition, the new device maintains 97.5% initial efficiency after 80 d in N without encapsulation and retains 91% of its initial efficiency after 180 h under 1 sun continuous illumination. The results demonstrate and pave the way for the development of efficient photovoltaic devices.
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http://dx.doi.org/10.1002/adma.201905766DOI Listing
February 2020

Molecular insights into the impacts of iron(III) ions on membrane fouling by alginate.

Chemosphere 2020 Mar 26;242:125232. Epub 2019 Oct 26.

College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China. Electronic address:

Molecular mechanisms responsible for the filtration behaviors of sodium alginate (SA) in presence of different iron(III) ion concentration were explored in this study. It was found that specific filtration resistance (SFR) of alginate mixtures (1.0 gSA/L) firstly increased and then decreased to a trough with iron(III) concentration increase from 0 to 2.5 mM. Alginate mixture interacting with 0.1 mM iron(III) possessed an SFR as high as 1.65 × 10 m kg, which could be explained by Flory-Huggins lattice theory related with gel filtration. Optical observation showed significant morphology transition (from gel to granular solids) of foulant layers with iron(III) concentration increase. A series of characterizations indicated the change of microstructure, pH and surface charge of alginate mixture with iron(III) concentration. Density functional theory (DFT) simulation suggested that iron(III) ion preferentially forms coordination bonds with three terminal carboxyl groups of alginate chains, facilitating elongation and cross-linking of alginate chains. Such a coordination mode induces formation of a slime and homogeneous gel, corresponding to high SFR. Continuous increase in iron(III) concentration leads to non-terminal coordination, which makes alginate chains more clustered and coiled. This effect, together with effects of the reduced surface charge and electric double layer compression, significantly decrease SFR of alginate mixtures. This study provided deep molecular insights into effects of iron(III) ions on alginate fouling.
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http://dx.doi.org/10.1016/j.chemosphere.2019.125232DOI Listing
March 2020

Fabrication of high-performance composite nanofiltration membranes for dye wastewater treatment: mussel-inspired layer-by-layer self-assembly.

J Colloid Interface Sci 2020 Feb 21;560:273-283. Epub 2019 Oct 21.

College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China. Electronic address:

Inspired by the mussel adhesion mechanism, plant polyphenol tannic acid (TA) with abundant catechol groups and hydrophilic Jeffamine (JA) containing amino groups were used in a layer-by-layer (LBL) process to fabricate composite nanofiltration (NF) membranes in this study. Alternately immersing a polyacrylonitrile substrate into individual TA and JA buffer solutions could readily construct a NF membrane selective layer without any pre-treatment to the substrate. The optimised membrane showed a high pure water permeance of 37 L m h bar whilst maintaining rejections higher than 90% towards various dyes with molecular weights ranging from 269 to 1017 g mol. Particularly, the obtained membrane exhibited excellent anti-fouling and long-term performance attributed to the hydrophilic membrane surface and covalent bonds in the selective layer. The novel strategy inherited the advantages of a mussel-inspired dopamine material but overcame its disadvantages. The results disclosed in this study not only provide a novel strategy to prepare composite NF membranes, but also facilitate the mussel-inspired LBL design of advanced materials for environmental applications.
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http://dx.doi.org/10.1016/j.jcis.2019.10.078DOI Listing
February 2020