74,892 results match your criteria water quality


Depth sequence distribution of water extractable colloidal phosphorus and its phosphorus speciation in intensively managed agricultural soils.

Chemosphere 2021 Jul 23;286(Pt 1):131665. Epub 2021 Jul 23.

Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, 61801, USA. Electronic address:

Legacy phosphorus (P) has accelerated the subsurface transport of colloidal P (CP) in intensively managed agricultural soils in the Midwestern U.S. Because of its high P sorption capacity and mobility, understanding the depth sequence distribution of mobile CP and its speciation in the soil profile is critical in assessing total P (TP) loss to protect the water quality of adjacent water bodies. Read More

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Tracing dissolved organic matter in inflowing rivers of Nansi Lake as a storage reservoir: Implications for water-quality control.

Chemosphere 2021 Jul 21;286(Pt 1):131624. Epub 2021 Jul 21.

Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Qingdao, 266237, PR China. Electronic address:

Quantitative characterization of dissolved organic matter (DOM) in various aquatic ecosystems has become of increasing importance as its transformation plays a key role in inland water carbon, yet few studies have quantified water DOM inputs to storage lakes for water quality control and safety assurance. This study assessed the quantity and quality of DOM in 21 inflow rivers of Nansi Lake as the important storage lake of large-scale water transfer projects by using excitation-emission matrix spectroscopy coupled with parallel factor analysis (EEM-PARAFAC) and ultraviolet-visible (UV-Vis) spectroscopy. The results showed that DOM contents varied significantly with an average value of 5. Read More

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Environmental challenges of intensive woody crops: The case of super high-density olive groves.

Sci Total Environ 2021 Jul 23;798:149212. Epub 2021 Jul 23.

IFAPA-Institute of Agricultural and Fisheries Research and Training, Centro IFAPA Camino de Purchil, PO Box 2027, E-18080 Granada, Spain; WEARE-Water, Environmental and Agricultural Resources Economics Research Group, Universidad de Cordoba, E-14071 Córdoba, Spain.

Super high-density olive groves (>800 trees ha) are rapidly expanding in olive oil producer countries, which entails a strong modification of the olive growing system with important agronomic, economic, sociocultural, and environmental consequences. Among them, the latter is particularly unknown. The aim of this paper is to bring the attention on the environmental impacts of super high-density olive groves, by systematically reviewing the current evidence and identifying knowledge gaps yet to be filled. Read More

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Transport process and source contribution of nitrogen in stormwater runoff from urban catchments.

Environ Pollut 2021 Jul 22;289:117824. Epub 2021 Jul 22.

State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, 19 Xinjiekou Outer Street, Beijing, 100875, PR China. Electronic address:

Nitrogen in urban stormwater has been widely studied, and effective management of nitrogen pollution is critical for improving urban stormwater and receiving water quality. This requires an in-depth understanding of the transport process and source contribution to both dissolved and particulate nitrogen in stormwater from urban catchments. In this study, 123 stormwater runoff samples were collected from an urban catchment during different rainfall events. Read More

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Unravelling the relation between processed crude oils and the composition of spent caustic effluents as well as the respective economic impact.

J Hazard Mater 2021 Jul 13;421:126629. Epub 2021 Jul 13.

IBET - Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2780-157 Oeiras, Portugal. Electronic address:

Spent caustic discharges are responsible for increasing oil and grease (O&G) matter in refineries wastewater, leading to increasing treatment costs due to low water quality and environmental constraints associated with high O&G concentration discharges. As a way to settle and optimize treatment technologies for such complex effluents, more insight regarding the effluents impact and deeper characterization is necessary. The present study intends to assess the possibility of a relationship between the processed crude oils with the polar O&G concentration in naphthenic spent caustic as well as in the final wastewater; Sines refinery was considered as case-study. Read More

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Investigation of spectrophotometric simultaneous absorption of Salmeterol and Fluticasone in Seroflo spray by continuous wavelet transform and radial basis function neural network methods.

Spectrochim Acta A Mol Biomol Spectrosc 2021 Jul 17;263:120192. Epub 2021 Jul 17.

Department of Chemistry, North Tehran Branch, Islamic Azad University, Tehran, Iran.

In this research, the simultaneous absorption of Salmeterol (SAL) and Fluticasone (FLU) in Seroflo spray was investigated using a spectrophotometric device via employing continuous wavelet transform (CWT) and radial basis function neural network (RBF-NN) methods. Root mean square error (RMSE) related to the RBF model was obtained 3.17 × 10 and 1. Read More

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Single and ternary competitive adsorption-desorption and degradation of amphenicol antibiotics in three agricultural soils.

J Environ Manage 2021 Jul 24;297:113366. Epub 2021 Jul 24.

National Reference Laboratory of Veterinary Drug Residues (HZAU) and MOA Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, Hubei, 430070, China; MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Hubei, 430070, China; National Laboratory for Veterinary Drug Safety Evaluation, Huazhong Agriculture University, Wuhan, 430070, China; College of Veterinary Medicine, Huazhong Agriculture University, Wuhan, 430070, China. Electronic address:

The widespread usage of veterinary antibiotics results in antibiotic contamination and increases environmental risks. This study was evaluated the single and ternary competitive adsorption-desorption and degradation of three amphenicol antibiotics (AMs): chloramphenicol (CAP), thiamphenicol (TAP), and florfenicol (FF) in three agricultural soils. The adsorption capacity of amphenicol antibiotics in the soil was weak, and the K value was in the range of 0. Read More

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Assessment of the global noise algorithm for automatic noise measurement in head CT examinations.

Med Phys 2021 Jul 27. Epub 2021 Jul 27.

Rice University, Houston, TX, USA.

Purpose: The global noise (GN) algorithm has been previously introduced as a method for automatic noise measurement in clinical CT images. Accuracy of the GN algorithm has been assessed in abdomen CT exams, but not in any other body part until now. This work assesses the GN algorithm accuracy in automatic noise measurement in head CT exams. Read More

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Monitoring the quality of the water used in mobile dialysis services in intensive care units in the city of Rio de Janeiro.

J Bras Nefrol 2021 Jul 23. Epub 2021 Jul 23.

Fundação Oswaldo Cruz, Instituto Nacional de Controle de Qualidade em Saúde, Rio de Janeiro, RJ, Brasil.

Introduction: Monitoring water quality in mobile dialysis (MD) services, assessing critical points and characterizing the risks inherent in the process, is essential to avoid risks to the patient's health. This study evaluated the microbiological quality of water in the MD of 36 hospitals with intensive treatment in the city of Rio de Janeiro.

Methods: 204 water samples were collected from the points of entry to the network (NET), post-osmosis (PO) and dialysis solution (DS). Read More

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Understanding the dairy production systems in rural settlements in the Brazilian semi-arid region: characterization, typology, and holistic perception.

Trop Anim Health Prod 2021 Jul 27;53(4):417. Epub 2021 Jul 27.

Department of Animal Science, State University of Acaraú Valley (UVA), Sobral, CE, Brazil.

The objective of this study was to characterize and typify dairy farms and to evaluate society's perception of dairy production in rural settlements in the Brazilian semi-arid region. A questionnaire containing questions related to socioeconomic, livestock, physical, herd management, and production indicators was applied to 17 milk farmers for typological analysis. A second questionnaire was subsequently applied to the same 17 farmers for the holistic perception of dairy farming in rural settlements, in addition to 47 technicians in the area of animal science and 140 laypeople. Read More

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Applicability of modified SWAT model (SWAT-Twn) on simulation of watershed sediment yields under different land use/cover scenarios in Taiwan.

Environ Monit Assess 2021 Jul 27;193(8):520. Epub 2021 Jul 27.

Department of Soil and Water Conservation, National Chung Hsing University, Taichung City, Taiwan.

Climate change leads to increasing intensity and frequency of extreme rainfalls, especially in Taiwan with steep slopes and rapid currents. Heavy rainfalls trigger serious erosion and landslides on hillslopes, which increase sand concentration in rivers, and thus affect the water quality of reservoirs and the ecohydrological functions of rivers. We take the Zhuoshui River basin as an example and applied the modified Soil Water Assessment Tool (SWAT) model, SWAT-Twn, to simulate sediment in the basin. Read More

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Effects of Vegetation Restoration on Soil Enzyme Activity in Copper and Coal Mining Areas.

Environ Manage 2021 Jul 27. Epub 2021 Jul 27.

Forestry Academy of Shandong Province, Jinan, 250014, China.

Mining areas are suffering from serious environmental hazards, such as soil erosion, water pollution as well as land degradation. In this study, two types of mining areas in Anhui Province, China-one a copper mining area and the other a coal mining area-were selected to compare the soil properties under different vegetation restoration conditions, which can be generally classified into reclaimed and non-reclaimed areas. Soil catalase and urease activities and soil chemical properties were chosen to be the main indicators of soil quality. Read More

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Lysosomal TPCN (two pore segment channel) inhibition ameliorates beta-amyloid pathology and mitigates memory impairment in Alzheimer disease.

Autophagy 2021 Jul 27:1-19. Epub 2021 Jul 27.

School of Chinese Medicine and Mr. And Mrs. Ko Chi Ming Centre for Parkinson's Disease Research, Hong Kong Baptist University, Hong Kong, China.

Abbreviations: Aβ: β-amyloid; AD: Alzheimer disease; AIF1/IBA1: allograft inflammatory factor 1; ALP: autophagy-lysosomal pathway; APP: amyloid beta precursor protein; ATP6V1B1/V-ATPase V1b1: ATPase H+ transporting V1 subunit B1; AVs: autophagy vacuoles; BAF: bafilomycin A; CFC: contextual/cued fear conditioning assay; CHX: Ca/H exchanger; CTF-β: carboxy-terminal fragment derived from β-secretase; CTSD: cathepsin D; fAD: familial Alzheimer disease; GFAP: glial fibrillary acidic protein; LAMP1: lysosomal associated membrane protein 1; LTP: long-term potentiation; MCOLN1/TRPML1: mucolipin 1; MAP1LC3B/LC3B: microtubule associated protein 1 light chain 3 beta; MAPT: microtubule associated protein tau; MWM: Morris water maze; NFT: neurofibrillary tangles; PFC: prefrontal cortex; PSEN1: presenilin 1; SQSTM1/p62: sequestosome 1; TBS: theta burst stimulation; TEM: transmission electronic microscopy; TPCN2/TPC2: two pore segment channel 2; WT: wild-type; V-ATPase: vacuolar type H-ATPase. Read More

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Effects of different technical substitutions on reducing replant disease of and the underlying mechanism.

Ying Yong Sheng Tai Xue Bao 2021 Jul;32(7):2485-2495

College of Life Sciences, Fujian Agriculture and Forestry University/Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, Fuzhou 350002, China.

is a traditional Chinese medicinical herb, with tuberous roots being used as a medicine. Serious continuous monoculture problems were suffered from process of artificial and intensive cultivation. To explore the effective technical methods to overcome the monoculture problems, the effects of different technical substitution patterns on soil environment remediation, photosynthetic physiology and yield performance of were assessed under continuous cropping system with four technical substitution treatments in the phase between two crops after the newly harvested (first crop): fallow (RP-F-RP), fallow treated with microbial fertilizer (RP-F-BF), water flooding (RP-WF), and water flooding treated with specific microbial fertilizer (RP-WF-BF). Read More

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Effects of thinning intensity on the understory water-holding capacity of var. plantation in the Bashang area of north China.

Ying Yong Sheng Tai Xue Bao 2021 Jul;32(7):2347-2354

College of Water and Soil Conservation, Beijing Forestry University, Beijing 100083, China.

The complex terrain and poor climatic conditions in Bashang area of Hebei Province result in water and soil loss and geological disasters, which pose a serious threat to ecological safety in North China. In order to improve local environmental quality, barren-resistant and fast-growing tree species such as var. and are planted with large areas. Read More

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Green alternative methods for pretreatment of whole jujube before drying process.

J Sci Food Agric 2021 Jul 27. Epub 2021 Jul 27.

Department of Traditional Chinese Medicine, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310016, China.

Background: Jujube contains a waxy cuticle which acts as a barrier against fungal pathogens, avoid leakage of mechanical and nutrition damage, and maintain water. Chemical treatment before drying is the most commonly method used for whole jujube. Although chemical pretreatment can effectively enhance drying kinetics, it can lead to the loss of soluble nutrients and cause food safety issues due to chemical residues. Read More

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Assessment of surface and groundwater quality for irrigation purposes in the Danube-Tisa-Danube hydrosystem area (Serbia).

Environ Monit Assess 2021 Jul 27;193(8):519. Epub 2021 Jul 27.

Faculty of Agriculture, University of Novi Sad, Trg D. Obradovica 8, 21000, Novi Sad, Serbia.

The study evaluates irrigation water quality in the Danube-Tisa-Danube hydrosystem area (Vojvodina, northern Serbia). The area is dominantly a plain with about 75% arable land, suitable for agricultural production and irrigation. Use of water of inadequate quality can have long-term effects on irrigated land and affect the yield of cultivated crops. Read More

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Effects of gender and slaughter age on meat quality of Anatolian water buffaloes.

Trop Anim Health Prod 2021 Jul 27;53(4):415. Epub 2021 Jul 27.

Department of Animal Breeding and Husbandry, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey.

The study aimed to investigate the effects of slaughter age and gender on specific carcass and technological meat quality characteristics in Anatolian water buffaloes. The study was conducted on 55 water buffaloes using a 2 × 2 factorial design with two independent variables at two levels. Gender subgroups of male (n = 29) and female (n = 26) and slaughter age subgroups of younger than 2 years of age (n = 29) and older than 2 years of age (n = 26) were evaluated. Read More

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Relational quality and uncertainty in common pool water management: an exploratory lab experiment.

Sci Rep 2021 Jul 26;11(1):15188. Epub 2021 Jul 26.

CIRAD-UMR G-EAU, University of Montpellier, Montpellier, France.

If there is one certainty for the sustainable management of water resources is that facing uncertainty is an unavoidable matter. A concern that, in addition to the best available scientific knowledge and models, requires deep insights about the socio relational processes that underlie decision-making. Our objective here is to better understand if and how the socio relational environment in which decisions are made shapes decision-making under uncertainty in common pool water resource management. Read More

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Electrochemical degradation of DCF by boron-doped diamond anode: degradation mechanism, pathways and influencing factors.

Water Sci Technol 2021 Jul;84(2):431-444

Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Qingdao 266061, China; Shandong Provincial Key Laboratory of Marine Monitoring Instrument and Equipment Technology, Qingdao 266061, China; School of Ocean Technology Sciences, Qilu University of Technology (Shandong Academy of Sciences), Qingdao 266061, China.

Nonsteroidal anti-inflammatory drugs (NSAIDs) have been widely detected in wastewater and surface water, indicating that the removal of NSAIDs by wastewater treatment plants was not efficient. Electrochemical advanced oxidation technology is considered to be an effective process. This study presents an investigation of the kinetics, mechanism, and influencing factors of diclofenac (DCF) degradation by an electrochemical process with boron-doped diamond anodes. Read More

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A module-based approach for elimination of organic micropollutants at wastewater treatment plants.

Water Sci Technol 2021 Jul;84(2):364-373

EMSCHERGENOSSENSCHAFT and LIPPEVERBAND (EGLV), Kronprinzenstrasse 24, 45128 Essen, Germany.

A technical feasibility study was carried out at the wastewater treatment plant (WWTP) Hamm-West in 2018, which included preliminary planning for the improvement of the plant, using different advanced wastewater technologies. The results of the technical feasibility study show that the application of activated carbon or ozone, in combination with an additional filtration system, can not only remove organic micropollutants efficiently but can also significantly improve the quality of other standard parameters in the WWTP effluent. This technical feasibility study, along with seven other studies, is part of the module-based approach the Emschergenossenschaft and Lippeverband (EGLV) is pursuing in order to improve wastewater treatment plants with advanced treatment systems. Read More

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Influence of road salt thawing peaks on the inflow composition and activated sludge properties in municipal wastewater treatment.

Water Sci Technol 2021 Jul;84(2):314-322

Institute for Water Quality and Resource Management, TU Wien, Karlsplatz 13/226, 1040 Vienna, Austria.

Operational data over 2 years from three large Austrian wastewater treatment plants (WWTPs) with design capacities of 4 million, 950,000 and 110,000 population equivalent (PE) were examined. Salt peaks, due to thawing road salt were detected and quantified by electrical conductivity, temperature and chloride measurement in the inflow of the WWTPs. Daily NaCl inflow loads up to 1,147 t/d and PE-specific loads of 0. Read More

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50 years of design and operation of large wastewater treatment plant conferences. A history of innovation and development.

Water Sci Technol 2021 Jul;84(2):263-273

Institute of Water Quality and Resource Management, TU Wien, Vienna, Austria.

Large wastewater treatment plants (>50,000 population equivalents) treat more than 80% of the wastewater treated on a global scale, today it might be even >90%. They therefore provide the most relevant contribution to water protection from urban and industrial wastewater. This was already the case in 1971 when academics realised that progress in the scientific community alone will not succeed in a rapid transfer of research results to practitioners in design and operation of these plants. Read More

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Assessment of surgical capacity in Chiapas, Mexico: a cross-sectional study of the public and private sector.

BMJ Open 2021 Jul 26;11(7):e044160. Epub 2021 Jul 26.

Compañeros En Salud, Jaltenango, Mexico.

Introduction: Surgical, anaesthesia and obstetric (SAO) care are essential, life-saving components of universal healthcare. In Chiapas, Mexico's southernmost state, the capacity of SAO care is unknown. This study aims to assess the surgical capacity in Chiapas, Mexico, as it relates to access, infrastructure, service delivery, surgical volume, quality, workforce and financial risk protection. Read More

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Iron Oxidation by a Fused Cytochrome-Porin Common to Diverse Iron-Oxidizing Bacteria.

mBio 2021 Jul 27:e0107421. Epub 2021 Jul 27.

Department of Earth Sciences, University of Delawaregrid.33489.35, Newark, Delaware, USA.

Iron (Fe) oxidation is one of Earth's major biogeochemical processes, key to weathering, soil formation, water quality, and corrosion. However, our understanding of microbial contribution is limited by incomplete knowledge of microbial iron oxidation mechanisms, particularly in neutrophilic iron oxidizers. The genomes of many diverse iron oxidizers encode a homolog to an outer membrane cytochrome (Cyc2) shown to oxidize iron in two acidophiles. Read More

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The Influence of pH on Zinc Lability and Toxicity to a Tropical Freshwater Microalga.

Environ Toxicol Chem 2021 Jul 23. Epub 2021 Jul 23.

CSIRO Land and Water, Lucas Heights, NSW, Australia.

Increased focus on the development and application of bioavailability-based metal water quality guideline values requires increased understanding of the influence of water chemistry on metal bioavailability and toxicity. Development of empirical models, such as multiple linear regression models, requires the assessment of the influence of individual water quality parameters as toxicity modifying factors. The present study investigated the effect of pH on the lability and toxicity of zinc to a tropical green microalga (Chlorella sp. Read More

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Modeling the Bioavailability of Nickel and Zinc to Ceriodaphnia dubia and Neocloeon triangulifer in Toxicity Tests with Natural Waters.

Environ Toxicol Chem 2021 Jul 23. Epub 2021 Jul 23.

Windward Environmental, Seattle, WA, USA.

We studied biotic ligand model (BLM) predictions of toxicity of nickel (Ni) and zinc (Zn) in natural waters from Illinois and Minnesota USA which had combinations of pH, hardness, and dissolved organic carbon (DOC) more extreme than 99.7% of waters in a nationwide database. We conducted 7-d chronic tests with Ceriodaphnia dubia, and 96-hr acute test and 14-d chronic tests with Neocloeon triangulifer, and estimated LC50s and EC20s for both species. Read More

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Gut microbial communities associated with phenotypically divergent populations of the striped stem borer Chilo suppressalis (Walker, 1863).

Sci Rep 2021 Jul 22;11(1):15010. Epub 2021 Jul 22.

Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.

Chilo suppressalis (Walker, 1863) is a serious stem borer of rice and water-oat plants, and has phenotypically diverged into rice and water-oat populations. Insect gut microbiota plays an important role in the host life and understanding the dynamics of this complicated ecosystem may improve its biological control. The effect of diet and gut compartments on the gut microflora of divergent populations of C. Read More

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Can pre-ozonation be combined with gravity-driven membrane filtration to treat shale gas wastewater?

Sci Total Environ 2021 Jul 20;797:149181. Epub 2021 Jul 20.

Key Laboratory of Deep Earth Science and Engineering (Ministry of Education), College of Architecture and Environment, Institute of New Energy and Low-Carbon Technology, Institute for Disaster Management and Reconstruction, Sichuan University, Chengdu, Sichuan 610207, PR China; Yibin Institute of Industrial Technology, Sichuan University, Yibin Park, Section 2, Lingang Ave., Cuiping District, Yibin, Sichuan 644000, PR China. Electronic address:

Low-cost gravity-driven membrane (GDM) filtration has the potential to efficiently manage highly decentralized shale gas wastewater (SGW). In this work, the feasibility of combining low dosage pre-ozonation with the GDM process was evaluated in the treatment of SGW. The results showed that pre-ozonation significantly increased the stable flux (372%) of GDM filtration, while slightly deteriorating the quality of the effluent water in terms of organic content (-14%). Read More

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Application of Machine Learning for eutrophication analysis and algal bloom prediction in an urban river: A 10-year study of the Han River, South Korea.

Sci Total Environ 2021 Jul 17;797:149040. Epub 2021 Jul 17.

Department of Environment and Energy, Sejong University, Seoul 05006, South Korea. Electronic address:

The increasing release of nutrients to aquatic environments has led to great concern regarding eutrophication and the risk of unwanted algal blooms. Based on observational data of 20 water quality parameters measured on a monthly basis at 40 stations from 2011 to 2020, this study applied different Machine Learning (ML) algorithms to suggest the best option for algal bloom prediction in the Han River, a large river in South Korea. Eight different ML algorithms were categorized into several groups of statistical learning, regression family, and deep learning, and were then compared for their suitability to predict the chlorophyll-derived trophic index (TSI-Chla). Read More

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