44 results match your criteria Chemical Engineering Journal[Journal]

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Efficient HO electrogeneration at graphite felt modified via electrode polarity reversal: Utilization for organic pollutants degradation.

Chem Eng J 2019 May 30;364:428-439. Epub 2019 Jan 30.

Department of Civil and Environmental Engineering, Northeastern University, Boston, Massachusetts 02115, United States.

Electrochemical synthesis of HO offers a great potential for water treatment. However, a significant challenge is the development of efficient cathode materials for the process. Herein, we implement a practical electrochemical cathode modification to support efficient HO electrogeneration via the reduction of dissolved anodic O. Read More

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http://dx.doi.org/10.1016/j.cej.2019.01.175DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7314056PMC

Fluorescent linear polyurea based on toluene diisocyanate: Easy preparation, broad emission and potential applications.

Chem Eng J 2020 Nov 13;399:125867. Epub 2020 Jun 13.

College of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.

In contrast to conventional fluorescent polymers featured by large conjugation structures, a new class of fluorescent polymers without above conjugations are gaining constant interest owing to their significant academic importance and promising applications in diverse fields. These unconventional fluorescent polymers are in general composed of heteroatoms (e.g. Read More

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http://dx.doi.org/10.1016/j.cej.2020.125867DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7292956PMC
November 2020
4.321 Impact Factor

Immunologically modified MnFeO nanoparticles to synergize photothermal therapy and immunotherapy for cancer treatment.

Chem Eng J 2020 Sep 28;396. Epub 2020 Apr 28.

Biophotonics Research Laboratory, Center of Interdisciplinary Biomedical Education and Research, College of Mathematics and Science, University of Central Oklahoma, Edmond, Oklahoma, 73034, USA.

Immunotherapy has been a promising candidate for cancer treatment. The combination of photothermal therapy (PTT) and immunotherapy have shown to cause tumor ablation and induce host immune response. However, this strategy is often hampered by a limited immune response and undesirable immunosuppression. Read More

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http://dx.doi.org/10.1016/j.cej.2020.125239DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7286552PMC
September 2020

Comparison of -induced AOPs ( and ) in the degradation of iopamidol: Kinetics, energy requirements and DBPs-related toxicity in sequential disinfection processes.

Chem Eng J 2020 Oct 30;398:125570. Epub 2020 May 30.

School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China.

The -induced advanced oxidation processes (AOPs, including and ) degradation kinetics and energy requirements of iopamidol as well as DBPs-related toxicity in sequential disinfection were compared in this study. The photodegradation of iopamidol in these processes can be well described by pseudo-first-order model and the removal efficiency ranked in descending order of  >   >  >   > . The synergistic effects could be attributed to diverse radical species generated in each system. Read More

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http://dx.doi.org/10.1016/j.cej.2020.125570DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7260538PMC
October 2020

All-polymer hybrid electret fibers for high-efficiency and low-resistance filter media.

Chem Eng J 2020 Oct 25;398:125626. Epub 2020 May 25.

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textiles, Donghua University, Shanghai 201620, China.

A one-step and controllable strategy to prepare all-polymer hybrid electret fibers is reported based on the coupling of polystyrene and polyvinylidene fluoride in electric response. The complementary dielectric properties between PS and PVDF generate dual-system electret charges within PS/PVDF fibers, thereby improving the electret effect. The bi-component all-polymer electret fibers show enhanced electret property and structural continuity, contributing to a N95 protective respirator with high filtration efficiency (99. Read More

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http://dx.doi.org/10.1016/j.cej.2020.125626DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7255179PMC
October 2020

Insight into CaO-based Fenton and Fenton-like systems: strategy for CaO-based oxidation of organic contaminants.

Chem Eng J 2019 Apr 21;361:919-928. Epub 2018 Dec 21.

State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.

This study conducted a comparison of the CaO-based Fenton (CaO/Fe(II)) and Fenton-like (CaO/Fe(III)) systems on their benzene degradation performance. The HO, Fe(II), Fe(III), and HO variations were investigated during the benzene degradation. Although benzene has been totally removed in the two systems, the variation patterns of the investigated parameters were different, leading to the different benzene degradation patterns. Read More

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http://dx.doi.org/10.1016/j.cej.2018.12.121DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7039662PMC

Microfluidic continuous flow synthesis of functional hollow spherical silica with hierarchical sponge-like large porous shell.

Chem Eng J 2019 Jun 14;366:433-438. Epub 2019 Feb 14.

Thayer School of Engineering, Dartmouth College, 14 Engineering Drive, Hanover, New Hampshire 03755, United States.

Microfluidics brings unique opportunities for engineering micro-/nanomaterials with well-controlled physicochemical properties. Herein, using a miniaturized multi-run spiral-shaped microreactor, we develop a flow synthesis strategy to continuously produce hollow spherical silica (HSS) with hierarchical sponge-like pore sizes ranging from several nanometers to over one hundred nanometers. The formation of HSS is realized by mixing two reactant flows, one containing cetyltrimethylammonium bromide (CTAB) and diluted ammonia and the other 1,3,5-trimethylbenzene (TMB) and diluted tetraethyl orthosilicate (TEOS), at a flow rate as high as 5 mL/min. Read More

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http://dx.doi.org/10.1016/j.cej.2019.02.095DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6874225PMC
June 2019
4.321 Impact Factor

Substrate oxidation enhances the electrochemical production of hydrogen peroxide.

Chem Eng J 2019 Oct;374:958-964

Linde + Robinson Laboratories, California Institute of Technology, Pasadena, CA 91125, United States.

Hydrogen peroxide (HO) is electrochemically produced via oxygen (O) reduction on a carbon cathode surface. In order to enhance the production of HO, anodic loss pathways, which significantly reduce the overall HO production rate, should be inhibited. In this study, we investigate the effects of organic electron donors (, typical chemical contaminants) on the anodic loss pathways of HO in a single-cell electrochemical reactor that employs an anode composed of TiO over-coated on a mixed-metal oxide ohmic contact catalyst, IrTaO, deposited on a Ti-metal that is coupled with a graphite rod cathode in a sodium sulfate (NaSO) electrolyte that is saturated with oxygen (O). Read More

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http://dx.doi.org/10.1016/j.cej.2019.05.165DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6686209PMC
October 2019

Mechanism of carbon tetrachloride reduction in ferrous ion activated calcium peroxide system in the presence of methanol.

Chem Eng J 2019 Apr 7;362:243-250. Epub 2019 Jan 7.

State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.

This study investigated the reductive initiation for the depletion of highly oxidized/perhalogenated pollutants, specifically the degradation of carbon tetrachloride (CT) was induced by adding methanol (MeOH) into a ferrous ion (Fe(II)) activated calcium peroxide (CaO) system. The results indicated that CT could be completely degraded within 20 min at CaO/Fe(II)/MeOH/CT molar ratio of 30/40/10/1 in this system. Scavenging tests suggested that both superoxide radical anion (O) and carbon dioxide radical anion (CO) were predominant reactive species responsible for CT destruction. Read More

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http://dx.doi.org/10.1016/j.cej.2019.01.034DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6777862PMC

Insight on the generation of reactive oxygen species in the CaO/Fe(II) Fenton system and the hydroxyl radical advancing strategy.

Chem Eng J 2018 Dec 21;353:657-665. Epub 2018 Jul 21.

State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.

Calcium peroxide (CaO) is a stable hydrogen peroxide (HO) carrier, and the CaO/Fe(II) system has been applied for treatment of various pollutants. It is commonly reported in the literature that hydroxyl radical (HO) and superoxide radical anions (O) are the two main reactive oxygen species (ROSs) generated in the CaO/Fe(II) system. However, many of the reported results were deduced from degradation performance rather than specific testing of radical generation. Read More

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http://dx.doi.org/10.1016/j.cej.2018.07.124DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6715144PMC
December 2018

Electrically heatable carbon nanotube point-of-use filters for effective separation and in-situ inactivation of .

Chem Eng J 2019 ;366:21-26

Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221, U.S.A.

Despite municipal chlorination and secondary disinfection, opportunistic waterborne pathogens (e.g., spp. Read More

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http://dx.doi.org/10.1016/j.cej.2019.02.054DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6604856PMC
January 2019
2 Reads
4.321 Impact Factor

Georgeite: A Rare Copper Mineral with Important Drinking Water Implications.

Chem Eng J 2019 ;355:1-10

Pegasus Technical Services, Inc. 26 W. Martin Luther King Drive, Cincinnati, Ohio 45268.

Significant research has been conducted on copper corrosion and solubility in drinking water, including the establishment of the "cupric hydroxide model". The model describes the temporal aging and associated solubility changes of copper minerals beginning with the most soluble solid, cupric hydroxide. Although the model explains copper levels in field observations well, there are aspects of the model that are not well understood, including a lack of evidence of the presence of cupric hydroxide in drinking water distribution systems. Read More

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http://dx.doi.org/10.1016/j.cej.2018.08.106DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6605079PMC
January 2019
1 Read

Nanoparticle-assisted ultrasound: A special focus on sonodynamic therapy against cancer.

Chem Eng J 2018 May;340:155-172

Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy.

At present, ultrasound radiation is broadly employed in medicine for both diagnostic and therapeutic purposes at various frequencies and intensities. In this review article, we focus on therapeutically-active nanoparticles (NPs) when stimulated by ultrasound. We first introduce the different ultrasound-based therapies with special attention to the techniques involved in the oncological field, then we summarize the different NPs used, ranging from soft materials, like liposomes or micro/nano-bubbles, to metal and metal oxide NPs. Read More

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http://dx.doi.org/10.1016/j.cej.2018.01.060DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6420022PMC
May 2018
1 Read

Synthesis of Polyurethane Scaffolds with Tunable Properties by Controlled Crosslinking of Tri-Block Copolymer and Polycaprolactone Triol for Tissue Regeneration.

Chem Eng J 2018 Sep 30;348:786-798. Epub 2018 Apr 30.

Department of Mechanical Engineering University of Wisconsin-Madison, Madison, WI, 53706, USA.

Mimicking the mechanical properties of native tissues is a critical criterion for an ideal tissue engineering scaffold. However, most biodegradable synthetic materials, including polyester-based polyurethanes (PUs), consist of rigid polyester chains and have high crystallinity. They typically lack the elasticity of most human tissues. Read More

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http://dx.doi.org/10.1016/j.cej.2018.04.198DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6238968PMC
September 2018
41 Reads

Mechanisms and effectivity of sulfate reducing bioreactors using a chitinous substrate in treating mining influenced water.

Chem Eng J 2017 Sep;323:270-277

Department of Environmental Sciences and LSU Superfund Research Center, Louisiana State University, Baton Rouge, LA 70803, United States.

Mining-influenced water (MIW) is one of the main environmental challenges associated with the mining industry. Passive MIW remediation can be achieved through microbial activity in sulfate-reducing bioreactors (SRBRs), but their actual removal rates depend on different factors, one of which is the substrate composition. Chitinous materials have demonstrated high metal removal rates, particularly for the two recalcitrant MIW contaminants Zn and Mn, but their removal mechanisms need further study. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S13858947173057
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http://dx.doi.org/10.1016/j.cej.2017.04.045DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6145482PMC
September 2017
5 Reads

Multivalent Mannose-Decorated NIR Nanoprobes for Targeting Pan Lymph Nodes.

Chem Eng J 2018 May 3;340:51-57. Epub 2018 Jan 3.

Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA.

Lymphadenectomy is a prerequisite for most malignancies to define the precise staging of cancer, as well as resect the possible metastases completely. While it improves prognosis, lymphadenectomy often causes postoperative edema or bleeding because of unclear surgical margins. In this study, we synthesized near-infrared (NIR) fluorescent nanoprobes with conjugating various mannose moieties on the surface to target macrophages in the lymph node. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S13858947183000
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http://dx.doi.org/10.1016/j.cej.2018.01.008DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6022841PMC
May 2018
11 Reads

Biocompatibility, biodegradation and excretion of polylactic acid (PLA) in medical implants and theranostic systems.

Chem Eng J 2018 May 3;340:9-14. Epub 2018 Jan 3.

Laboratory for Targeted Drug Delivery and Personalized Medicine Technologies, Department of Chemical Engineering, Technion - Israel Institute of Technology, Haifa 32000, Israel.

Polylactic acid (PLA) is the most commonly used biodegradable polymer in clinical applications today. Examples range from drug delivery systems, tissue engineering, temporary and long-term implantable devices; constantly expanding to new fields. This is owed greatly to the polymer's favorable biocompatibility and to its safe degradation products. Read More

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http://dx.doi.org/10.1016/j.cej.2018.01.010DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6682490PMC
May 2018
1 Read

Drastic Enhancement of HO Electro-generation by Pulsed Current for Ibuprofen Degradation: Strategy Based on Decoupling Study on HO Decomposition Pathways.

Chem Eng J 2018 Apr 30;338:709-718. Epub 2017 Dec 30.

Department of Civil and Environmental Engineering, Northeastern University, Boston, Massachusetts 02115, United States.

Efficient HO electrogeneration from 2-electron oxygen reduction reaction (ORR) represents an important challenge for environmental remediation application. HO production is determined by 2-electron ORR as well as HO decomposition. In this work, a novel strategy based on the systematical investigation on HO decomposition pathways was reported, presenting a drastically improved bulk HO concentration. Read More

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http://dx.doi.org/10.1016/j.cej.2017.12.152DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7062375PMC

Naphthenic acids removal from high TDS produced water by persulfate mediated iron oxide functionalized catalytic membrane, and by nanofiltration.

Chem Eng J 2017 Nov 24;327:573-583. Epub 2017 Jun 24.

Dept. of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506.

Oil industries generate large amounts of produced water containing organic contaminants, such as naphthenic acids (NA) and very high concentrations of inorganic salts. Recovery of potable water from produced water can be highly energy intensive is some cases due to its high salt concentration, and safe discharge is more suitable. Here, we explored catalytic properties of iron oxide (FeO nanoparticles) functionalized membranes in oxidizing NA from water containing high concentrations of total dissolved solids (TDS) using persulfate as an oxidizing agent. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S13858947173107
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http://dx.doi.org/10.1016/j.cej.2017.06.128DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5791545PMC
November 2017
5 Reads

Application of ascorbic acid to enhance trichloroethene degradation by Fe(III)-activated calcium peroxide.

Chem Eng J 2017 Oct 10;325:188-198. Epub 2017 May 10.

State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.

The enhancement effect of an environmentally friendly reducing agent, ascorbic acid (AA), on trichloroethene (TCE) degradation by Fe(III)-activated calcium peroxide (CP) was evaluated. The addition of AA accelerated the transformation of Fe(III) to Fe(II), and the complexation of Fe(III)/Fe(II) with AA and its products alleviated the precipitation of dissolved iron. These impacts enhanced the generation of reactive oxygen species (ROSs). Read More

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https://linkinghub.elsevier.com/retrieve/pii/S13858947173074
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http://dx.doi.org/10.1016/j.cej.2017.05.004DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5665388PMC
October 2017
4 Reads

Benzene oxidation by Fe(III)-catalyzed sodium percarbonate: matrix constituent effects and degradation pathways.

Chem Eng J 2017 Feb 6;309:22-29. Epub 2016 Oct 6.

State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.

Complete degradation of benzene by the Fe(III)-activated sodium percarbonate (SPC) system is demonstrated. Removal of benzene at 1.0 mM was seen within 160 min, depending on the molar ratios of SPC to Fe(III). Read More

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http://dx.doi.org/10.1016/j.cej.2016.10.006DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5612506PMC
February 2017
67 Reads

The destruction of benzene by calcium peroxide activated with Fe(II) in water.

Chem Eng J 2016 Oct 10;302:187-193. Epub 2016 May 10.

State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.

The ability of Fe(II)-activated calcium peroxide (CaO) to remove benzene is examined with a series of batch experiments. The results showed that benzene concentrations were reduced by 20 to 100% within 30 min. The magnitude of removal was dependent on the CaO/Fe(II)/Benzene molar ratio, with much greater destruction observed for ratios of 4/4/1 or greater. Read More

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http://dx.doi.org/10.1016/j.cej.2016.05.016DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5607478PMC
October 2016
9 Reads

Noble metal-modified octahedral anatase titania particles with enhanced activity for decomposition of chemical and microbiological pollutants.

Chem Eng J 2017 Jun;318:121-134

Institute for Catalysis, Hokkaido University, N21, W10, 001-0021 Sapporo, Japan.

Octahedral anatase particles (OAPs) were prepared by hydrothermal (HT) reaction of titanate nanowires (TNWs). OAPs were modified with noble metals (Au, Ag, Cu and Pt) by two photodeposition methods: in the absence and in the initial presence of oxygen in the system. Photocatalytic activities for oxidative decomposition of acetic acid and anaerobic dehydrogenation of methanol under UV/vis irradiation and for oxidation of 2-propanol under visible light irradiation were investigated. Read More

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http://dx.doi.org/10.1016/j.cej.2016.05.138DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5391806PMC
June 2017
22 Reads

Degradation of landfill leachate compounds by persulfate for groundwater remediation.

Chem Eng J 2017 Jan 16;307:399-407. Epub 2016 Aug 16.

College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.

In this study, batch and column experiments were conducted to evaluate the feasibility of using persulfate oxidation to treat groundwater contaminated by landfill leachate (CGW). In batch experiments, persulfate was compared with HO, and permanganate for oxidation of organic compounds in CGW. It was also compared with the potential of biodegradation for contaminant removal from CGW. Read More

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http://dx.doi.org/10.1016/j.cej.2016.08.069DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5456458PMC
January 2017
33 Reads

Removal of Arsenic from water using synthetic FeS nanoparticles.

Chem Eng J 2016 Apr;290:428-437

Department of Chemistry University of Texas Rio Grande Valley 1201 West University, Dr. Edinburgh TX 78539.

In the present study, pyrrhotite was used to remove arsenite and arsenate from aqueous solutions. The FeS was synthesized using a solvothermal synthetic method and it was characterized using XRD and SEM micrographs. Furthermore, the particle size for the nanomaterial FeS was determined to be 29. Read More

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http://dx.doi.org/10.1016/j.cej.2016.01.053DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4823647PMC
April 2016
27 Reads

Advanced removal of in bioaerosols by simultaneous adsorption and photocatalytic oxidation of Cu-doped TiO/PU under visible irradiation.

Chem Eng J 2016 Feb 4;286:377-386. Epub 2015 Nov 4.

Department of Civil and Environmental Engineering, University of Ulsan, Daehakro 93, Namgu, Ulsan 680-749, Republic of Korea.

Polyurethane (PU), a honeycomb structure material, was used as a substrate onto which TiO and Cu-TiO were deposited in order to integrate the adsorption property to the photocatalysts. TiO deposited on PU (TiO/PU) and Cu-doped TiO deposited on PU (Cu-TiO/PU) were synthesized and applied to the removal of (), a frequently encountered airborne yeast. The removal capacities of by PU, TiO/PU and Cu-TiO/PU were 1. Read More

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http://dx.doi.org/10.1016/j.cej.2015.10.100DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7108340PMC
February 2016

Enhancement effects of chelating agents on the degradation of tetrachloroethene in Fe(III) catalyzed percarbonate system.

Chem Eng J 2015 Dec 23;281:286-294. Epub 2015 Jun 23.

State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.

The performance of Fe(III)-based catalyzed sodium percarbonate (SPC) for stimulating the oxidation of tetrachloroethene (PCE) for groundwater remediation applications was investigated. The chelating agents citric acid monohydrate (CIT), oxalic acid (OA), and Glutamic acid (Glu) significantly enhanced the degradation of PCE. Conversely, ethylenediaminetetraacetic acid (EDTA) had a negative impact on PCE degradation, which may due to its strong Fe chelation and HO scavenging abilities. Read More

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http://dx.doi.org/10.1016/j.cej.2015.06.076DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4634672PMC
December 2015
9 Reads

Novel integrated approach of adsorption and photo-oxidation using Ag-TiO/PU for bioaerosol removal under visible light.

Chem Eng J 2015 Sep 16;275:357-365. Epub 2015 Apr 16.

Department of Civil and Environmental Engineering, University of Ulsan, Daehakro 93, Namgu, Ulsan 680-749, Republic of Korea.

We investigated a novel approach by synthesizing an integrated material, which could act as both adsorbent and photocatalytic material, for bioaerosol purification under visible light conditions. Ag was used as a dopant agent to enhance photocatalytic activity of TiO, leading to high photocatalytic activity of the doped TiO even under visible light. Under visible light, the doped TiO photocatalyst could produce oxy radicals, oxidative agents, that participate in oxidation reactions to decompose important organic components of bacteria, leading to death or removal of bacteria from an aerosol. Read More

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http://dx.doi.org/10.1016/j.cej.2015.04.055DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7185811PMC
September 2015

Degradation of trichloroethene by siderite-catalyzed hydrogen peroxide and persulfate: Investigation of reaction mechanisms and degradation products.

Chem Eng J 2015 Aug;274:61-68

Development Research Center of the Ministry of Water Resources, Beijing 100038, PR China.

A binary catalytic system, siderite-catalyzed hydrogen peroxide (HO) coupled with persulfate (SO), was investigated for the remediation of trichloroethene (TCE) contamination. Batch experiments were conducted to investigate reaction mechanisms, oxidant decomposition rates, and degradation products. By using high performance liquid chromatography (HPLC) coupled with electron paramagnetic resonance (EPR), we identified four radicals (hydroxyl (HO·), sulfate (SO·), hydroperoxyl (HO·), and superoxide (O·)) in the siderite-catalyzed HO-SO system. Read More

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http://dx.doi.org/10.1016/j.cej.2015.03.056DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4520253PMC
August 2015
21 Reads

Experimental measurement and modelling of reactive species generation in TiO nanoparticle photocatalysis.

Chem Eng J 2015 Jul 9;271:260-268. Epub 2015 Mar 9.

Politecnico di Milano, DICA - Environmental Section, Piazza Leonardo da Vinci 32, 20133 Milano, Italy.

The generation of reactive species in titanium dioxide (TiO) nanoparticle photocatalysis was assessed in a laboratory scale setup, in which P25 Aeroxide TiO suspensions were photoactivated by means of UV-A radiation. Photogenerated holes and hydroxyl radicals were monitored over time by observing their selective reaction with probe compounds, iodide and terephthalic acid, respectively. TiO aggregate size and structure were characterized over the reaction time. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S13858947150031
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http://dx.doi.org/10.1016/j.cej.2015.03.004DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5119892PMC
July 2015
27 Reads

Synthesis of hybrid hydrophobic composite air filtration membranes for antibacterial activity and chemical detoxification with high particulate filtration efficiency (PFE).

Chem Eng J 2015 Jan 17;260:801-808. Epub 2014 Sep 17.

Environmental & Water Technology Centre of Innovation, Ngee Ann Polytechnic, Singapore 599489, Singapore.

Hybrid hydrophobic composite PVDF-Ag-AlO nanofibrous air filtration membranes are synthesized by the electrospinning method with different concentrations of AlO and fixed concentration of Ag to study their antibacterial, particulate filtration efficiencies, and their detoxification ability. All the membranes were characterized for their physical and chemical properties before being tested. It was also found that at AlO concentrations higher than 8%, nanofibers could not be formed by the pure blending and electrospinning technique. Read More

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http://dx.doi.org/10.1016/j.cej.2014.08.062DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7108431PMC
January 2015

Enhancing the adsorption of ionic liquids onto activated carbon by the addition of inorganic salts.

Chem Eng J 2014 Sep;252:305-310

Departamento de Química, CICECO, Universidade de Aveiro, 3810-193 Aveiro, Portugal.

Most ionic liquids (ILs) are either water soluble or present a non-negligible miscibility with water that may cause some harmful effects upon their release into the environment. Among other methods, adsorption of ILs onto activated carbon (AC) has shown to be an effective technique to remove these compounds from aqueous solutions. However, this method has proved to be viable only for hydrophobic ILs rather than for the hydrophilic that, being water soluble, have a larger tendency for contamination. Read More

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http://dx.doi.org/10.1016/j.cej.2014.05.009DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4265388PMC
September 2014
4 Reads

Adenovirus inactivation by in situ photocatalytically and photoelectrocatalytically generated halogen viricides.

Chem Eng J 2014 Oct 22;253:538-543. Epub 2014 May 22.

Centre for Clean Environment and Energy, Gold Coast Campus, Griffith University, Queensland 4222, Australia.

This study investigates and compares the virucidal performances of photocatalytic (PC) and photoelectrocatalytic (PEC) treatments in the presence and absence of halides, such as Br and Cl, under comparable experimental conditions. The results confirm that the PC virucidal efficiency can be enhanced in the presence of low halide concentrations (e.g. Read More

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http://dx.doi.org/10.1016/j.cej.2014.05.059DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7108339PMC
October 2014

Thermodynamics, Kinetics, and Activation energy Studies of the sorption of chromium(III) and chromium(VI) to a MnO nanomaterial.

Chem Eng J 2014 Oct;254:374-383

Department of Chemistry The University of Texas-Pan American Edinburg TX, 78539.

In this study, a manganese oxide, MnO was used to remove chromium(III) and chromium(VI) from aqueous solutions. The MnO nanomaterial was synthesized through a precipitation method, and was characterized using XRD, which confirmed the material had a crystal structure similar to hausmannite. In addition, using Scherrer's equation it was determined that the nanomaterial had an average grain size of 19. Read More

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http://dx.doi.org/10.1016/j.cej.2014.05.110DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4119465PMC
October 2014
8 Reads

Sorption of Cr(III) and Cr(VI) to High and Low Pressure Synthetic Nano-Magnetite (FeO)Particles.

Chem Eng J 2014 Oct;254:171-180

Department of Chemistry and Environmental Science and Engineering PhD program, The University of Texas at El Paso; 500 W University Ave., El Paso TX 79968, United States.

The binding of Cr(III) and Cr(VI) to synthetic nano-magnetie particles synthesized under open vessel conditions and a microwave assisted hydrothermal synthesis techniques was investigated. Batch studies showed that the binding of both the Cr(III) and Cr(VI) bound to the nano-materials in a pH dependent manner. The Cr(III) maximized at binding at pH 4 and 100% binding. Read More

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http://dx.doi.org/10.1016/j.cej.2014.05.112DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4119444PMC
October 2014
3 Reads

MCM-41 impregnated with A zeolite precursor: Synthesis, characterization and tetracycline antibiotics removal from aqueous solution.

Chem Eng J 2013 May;223(100):678-687

State Key Laboratory of Environmental Criteria and Risk Assessment, China Research Academy of Environmental Science, Beijing 200012, PR China.

In this paper, the MCM-41 has been modified by impregnation with zeolite A to prepare a kind of new adsorbent. The adsorption of TC from aqueous solutions onto modified MCM-41 has been studied. It was discovered that the adsorption capability of zeolite A modified MCM-41 (A-MCM-41) increased dramatically after modification. Read More

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http://dx.doi.org/10.1016/j.cej.2013.02.088DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4068708PMC
May 2013
13 Reads

Electrochemical Removal Of Selenate From Aqueous Solutions.

Chem Eng J 2013 Jan 10;215-216:678-684. Epub 2012 Nov 10.

Department of Environmental Engineering, Chonbuk National University, 567 Baekje-daero, Jeonju, Jeollabukdo, Republic of Korea.

Removal of selenate from solution is investigated in batch electrochemical systems using reactive iron anodes and copper plate cathode in a bicarbonate medium. Iron anodes produce ferrous hydroxide, which is a major factor in the removal of selenate from solution. Iron anodes also generate a significant decrease in the oxidation-reduction potential (ORP) of the solution because it prevents generation of oxygen gas at the anode by electrolysis. Read More

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3559022PMC
http://dx.doi.org/10.1016/j.cej.2012.09.135DOI Listing
January 2013
32 Reads

Spectroscopic verification of zinc absorption and distribution in the desert plant Prosopis juliflora-velutina (velvet mesquite) treated with ZnO nanoparticles.

Chem Eng J 2011 Jun 15;170(1-3):346-352. Epub 2010 Dec 15.

Chemistry Department, The University of Texas at El Paso, 500 West University Ave., El Paso, TX 79968, United States.

The impact of metal nanoparticles (NPs) on biological systems, especially plants, is still not well understood. The aim of this research was to determine the effects of zinc oxide (ZnO) NPs in velvet mesquite (Prosopis juliflora-velutina). Mesquite seedlings were grown for 15 days in hydroponics with ZnO NPs (10 nm) at concentrations varying from 500 to 4000 mg L(-1). Read More

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http://dx.doi.org/10.1016/j.cej.2010.12.021DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3399254PMC

Arsenic removal via ZVI in a hybrid spouted vessel/fixed bed filter system.

Chem Eng J 2012 May;189-190:237-243

School of Engineering, Brown University, Providence, RI 02912, United States.

The description and operation of a novel, hybrid spouted vessel/fixed bed filter system for the removal of arsenic from water are presented. The system utilizes zero-valent iron (ZVI) particles circulating in a spouted vessel that continuously generates active colloidal iron corrosion products via the "self-polishing" action between ZVI source particles rolling in the moving bed that forms on the conical bottom of the spouted vessel. This action also serves as a "surface renewal" mechanism for the particles that provides for maximum utilization of the ZVI material. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S13858947120027
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http://dx.doi.org/10.1016/j.cej.2012.02.063DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3332536PMC
May 2012
2 Reads

Cyclic electrowinning/precipitation (CEP) system for the removal of heavy metal mixtures from aqueous solutions.

Chem Eng J 2011 Nov;175:103-109

Brown University, School of Engineering, Providence, RI 02912, USA.

The description and operation of a novel cyclic electrowinning/precipitation (CEP) system for the simultaneous removal of mixtures of heavy metals from aqueous solutions are presented. CEP combines the advantages of electrowinning in a spouted particulate electrode (SPE) with that of chemical precipitation and redissolution, to remove heavy metals at low concentrations as solid metal deposits on particulate cathode particles without exporting toxic metal precipitate sludges from the process. The overall result is very large volume reduction of the heavy metal contaminants as a solid metal deposit on particles that can either be safely discarded as such, or further processed to recover particular metals. Read More

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http://dx.doi.org/10.1016/j.cej.2011.09.062DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3217272PMC
November 2011
2 Reads

Nanosilver on nanostructured silica: Antibacterial activity and Ag surface area.

Chem Eng J 2011 Jun;170(2-3):547-554

Particle Technology Laboratory, Institute of Process Engineering, Department of Mechanical and Process Engineering, Sonneggstrasse 3, CH-8092 Zurich.

Nanosilver is one of the first nanomaterials to be closely monitored by regulatory agencies worldwide motivating research to better understand the relationship between Ag characteristics and antibacterial activity. Nanosilver immobilized on nanostructured silica facilitates such investigations as the SiO support hinders the growth of nanosilver during its synthesis and, most importantly, its flocculation in bacterial suspensions. Here, such composite Ag/silica nanoparticles were made by flame spray pyrolysis of appropriate solutions of Ag-acetate or Ag-nitrate and hexamethyldisiloxane or tetraethylorthosilicate in ethanol, propanol, diethylene glucolmonobutyl ether, acetonitrile or ethylhexanoic acid. Read More

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http://dx.doi.org/10.1016/j.cej.2011.01.099DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3667483PMC
June 2011
18 Reads

Homogeneous and heterogeneous AOPs for rapid degradation of Triton X-100 in aqueous media via UV light, nano titania hydrogen peroxide and potassium persulfate.

Chem Eng J 2011 Feb 13;167(1):172-182. Epub 2010 Dec 13.

Department of Applied Chemistry, University of Zanjan, Zanjan, Iran.

Feasibility of degradation of Triton X-100 as a widely used and resistive surfactant in aqueous media was studied via some homogeneous and heterogeneous AOPs of UV/TiO, UV/HO and UV/SO. For treatment of solutions containing 20 mg/L of Triton, the optimum obtained conditions are: 5.0 mg/L of nano TiO, 270. Read More

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http://dx.doi.org/10.1016/j.cej.2010.12.017DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7185520PMC
February 2011

Investigation of the performance of TiO photocatalytic coatings.

Chem Eng J 2011 Feb 24;167(1):13-21. Epub 2010 Nov 24.

Department of Chemical and Biomolecular Engineering, the Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, PR China.

TiO photocatalysts were prepared and coated on surfaces. Ultrathin TiO coatings were obtained by wash-coating and screen-printing techniques. The latter provides films of excellent adhesion that could tolerate washing under water jet. Read More

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http://dx.doi.org/10.1016/j.cej.2010.11.061DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7108342PMC
February 2011

Protein Binding to Peptide-Imprinted Porous Silica Scaffolds.

Authors:
M E Brown D A Puleo

Chem Eng J 2008 Mar;137(1):97-101

Center for Biomedical Engineering, University of Kentucky, Lexington, KY 40506.

Of the many types of biomolecules used for molecular imprinting applications, proteins are some of the most useful, yet challenging, templates to work with. One method, termed the 'epitope approach', involves imprinting a short peptide fragment of the protein into the polymer to promote specific adsorption of the entire protein, similar to the way an antigen binds to an antibody via the epitope. Whole lysozyme or the 16 residue lysozyme C peptide was imprinted into porous silica scaffolds using sol-gel processing. Read More

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http://dx.doi.org/10.1016/j.cej.2007.09.002DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2390877PMC
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