28,576 results match your criteria water sediment


Reducing arsenic toxicity using the interfacial oxygen nanobubble technology for sediment remediation.

Water Res 2021 Sep 11;205:117657. Epub 2021 Sep 11.

Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China; Integrated Water-Energy-Food Facility (iWEF), School of Animal, Rural, and Environmental Sciences, Nottingham Trent University, Nottinghamshire NG25 0QF, United Kingdom. Electronic address:

The arsenic (As)-bearing eutrophic waters may suffer from the dual conditions of harmful algal blooms and release of As, driven by algal-induced hypoxia/anoxia. Here, we investigate the use of interfacial oxygen (O) nanobubble technology to combat the hypoxia and control As exposure in simulated mesocosm experiments. It was observed that remediation of algal-induced hypoxia at the sediment-water interfaces (SWI) by application of O nanobubbles reduced the level of dissolved As from 23. Read More

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September 2021

Fine sediment effects on seagrasses: A global review, quantitative synthesis and multi-stressor model.

Mar Environ Res 2021 Sep 17;171:105480. Epub 2021 Sep 17.

Coastal Marine Field Station, University of Waikato, Tauranga, 3110, New Zealand.

This review collates research into fine sediment as a stressor of seagrass and emphasizes the multiple modes of action of this contaminant. The article is based on a bibliographic database search that identified 201 articles describing sediment impacts on seagrasses. Articles were classified by one of three non-exclusive modes of action: 1) light reduction; 2) smothering (burial), and 3) effects via rhizosphere physico-chemistry. Read More

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September 2021

Microbial river-to-sea continuum: gradients in benthic and planktonic diversity, osmoregulation and nutrient cycling.

Microbiome 2021 Sep 20;9(1):190. Epub 2021 Sep 20.

School of Biological Sciences, University of Auckland, Auckland, 1010, New Zealand.

Background: Coastal aquatic ecosystems include chemically distinct, but highly interconnected environments. Across a freshwater-to-marine transect, aquatic communities are exposed to large variations in salinity and nutrient availability as tidal cycles create periodic fluctuations in local conditions. These factors are predicted to strongly influence the resident microbial community structure and functioning, and alter the structure of aquatic food webs and biogeochemical cycles. Read More

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September 2021

Ecological interception effect of mangroves on microplastics.

J Hazard Mater 2021 Sep 15;423(Pt B):127231. Epub 2021 Sep 15.

College of the Environment and Ecology, Xiamen University, Xiamen, PR China.

As the last barrier preventing river pollutants from entering the ocean, mangroves have strong absorption and purification abilities, and strong tolerance. We collected mangrove surface water and sediment samples from the Xixi Estuary of Xiamen city. The results showed that the abundance of microplastics in seawater ranged from 620 to 13,100 n/m, the abundance of microplastics in sediment ranged from 143 to 488 n/kg, the distribution of microplastics was uneven, and the abundance of microplastics in the Xixi Estuary mangrove was significantly higher than that in the non-mangrove area. Read More

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September 2021

Comparative study on polychlorinated biphenyl sorption to activated carbon and biochar and the influence of natural organic matter.

Chemosphere 2021 Sep 13;287(Pt 3):132239. Epub 2021 Sep 13.

Department of Civil and Environmental Engineering, School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China.

The sorption isotherms of polychlorinated biphenyls (PCBs) on carbons (coal based activated carbon named AC and hardwood derived biochar named BC) and natural organic matter (NOM) loaded carbons were examined and carbon-water partition coefficients (K) were calculated. The purpose was to accurately predict the effectiveness of in-situ carbon treatments on the sediment impacted with hydrophobic organic chemicals (HOCs). For 1 month sorption, AC K values were significantly higher than BC, corresponding to the much larger surface area (particularly in mesopores) for AC. Read More

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September 2021

Multimedia fate model and risk assessment of typical antibiotics in the integrated demonstration zone of the Yangtze River Delta, China.

Sci Total Environ 2021 Sep 14;805:150258. Epub 2021 Sep 14.

Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, Austin, TX, 78712,USA.

Due to the widespread consumption of antibiotics by humans and animals, antibiotic residues from human and animal excrements are released into the environment through domestic sewage and breeding wastewater, which ultimately affect the ecological environment and human health. In this study, the concentrations of 10 antibiotics in the air, water, soil, and sediment from 2013 to 2019 in Qingpu District of the integrated demonstration zone of the Yangtze River Delta were predicated by developing a dynamic Level IV fugacity model. The influence of seasonal environmental factors (e. Read More

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September 2021

Phosphorus sources, forms, and abundance as a function of streamflow and field conditions in a Maumee River tributary, 2016-2019.

J Environ Qual 2021 Sep 20. Epub 2021 Sep 20.

U.S. Geological Survey, Upper Midwest Environmental Sciences Center, 2630 Fanta Reed Road, La Crosse, WI, 54603.

Total phosphorus (TP), dissolved P (DP), and suspended sediment (SS) were sampled in Black Creek, Indiana, monthly during base flow and for 100 storm events during water years 2016-2019, enabling analysis of how each of these varied as a function of streamflow and field conditions at nested edge-of-field sites. Particulate P was normalized by SS (P = [TP-DP]/SS). Streamflow events were differentiated by maximum TP concentrations co-occurring with maximum SS ("SED") or DP ("SOL"). Read More

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September 2021

Estuarine tidal range dynamics under rising sea levels.

PLoS One 2021 20;16(9):e0257538. Epub 2021 Sep 20.

Water Research Laboratory, School of Civil and Environmental Engineering, UNSW Sydney, Sydney, NSW, Australia.

How an estuary responds to sea level rise (SLR) is complex and depends on energy drivers (e.g., tides and river inflows), estuarine geometry (e. Read More

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September 2021

Gut Microbiota Associated With Different Sea Lamprey () Life Stages.

Front Microbiol 2021 3;12:706683. Epub 2021 Sep 3.

BioTechnology Institute, University of Minnesota, St. Paul, MN, United States.

Sea lamprey (SL; ), one of the oldest living vertebrates, have a complex metamorphic life cycle. Following hatching, SL transition into a microphagous, sediment burrowing larval stage, and after 2-10+ years, the larvae undergo a dramatic metamorphosis, transforming into parasitic juveniles that feed on blood and bodily fluids of fishes; adult lamprey cease feeding, spawn, and die. Since gut microbiota are critical for the overall health of all animals, we examined the microbiota associated with SLs in each life history stage. Read More

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September 2021

Influence of Environmental Factors on the Variability of Archaeal Communities in a Karst Wetland.

Front Microbiol 2021 3;12:675665. Epub 2021 Sep 3.

School of Biotechnology, Guilin Medical University, Guilin, China.

Archaea are ubiquitous and play an important role in elemental cycles in Earth's biosphere; but little is known about their diversity, distribution, abundance, and impact in karst environments. The present study investigated the effect of environmental factors on the variability of archaeal communities in the sediment of the Huixian karst wetland, the largest karst wetland in South China. Sediment cores were obtained from four sampling sites with different water depths and macrophyte inhabitants in both the winter of 2016 and the summer of 2018. Read More

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September 2021

Evidence of underestimation in microplastic research: A meta-analysis of recovery rate studies.

Sci Total Environ 2021 Sep 9;805:150227. Epub 2021 Sep 9.

School of Chemistry, Faculty of Engineering and Physical Sciences, University of Southampton, Highfield Campus, University Road, Southampton SO17 1BJ, United Kingdom. Electronic address:

Research on microplastics in the environment is of high interest to many scientists and industries globally. Key to the success of this research is the accuracy, efficiency, reliability, robustness and repeatability of the method(s) used to isolate the microplastics from environmental media. However, with microplastics now being found in new complex media, many multifaceted methods have been developed to research the quantities of these pollutants. Read More

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September 2021

Partitioning and potential sources of polychlorinated naphthalenes in water-sediment system from the Yangtze River Delta, China.

Chemosphere 2021 Sep 15;287(Pt 3):132265. Epub 2021 Sep 15.

Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China.

Spatial trends, partitioning behavior, and potential sources of polychlorinated naphthalenes (PCNs) in water-sediment system from the Yangtze River Delta (YRD) were investigated in this study. The total concentrations of 75 PCNs in water and sediment samples were 0.022-0. Read More

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September 2021

Impacts of municipal wastewater treatment plant discharge on microbial community structure and function of the receiving river in Northwest Tibetan Plateau.

J Hazard Mater 2021 Sep 12;423(Pt B):127170. Epub 2021 Sep 12.

College of Environmental Sciences and Engineering, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Peking University, Beijing 100871, China; State Environmental Protection Key Laboratory of All Materials Flux in River Ecosystems, Beijing 100871, China; State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China. Electronic address:

Wastewater treatment plant (WWTP) effluents carrying plenty of nutrients and micropollutants pose serious threats to receiving rivers, however, the response of microbial community structure and function to WWTP effluents discharge is still poorly understood. To address this knowledge gap, paired water and sediment samples from 17 sites of the Huangshui River, and effluents from 6 WWTPs were collected to investigate the effect of WWTP discharge on riverine microbial communities. Our results revealed that WWTP effluents exerted significant effects on planktonic rather than sedimentary microorganisms in the receiving river. Read More

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September 2021

Contribution of boulder reef habitats to oxygen dynamics of a shallow estuary.

Sci Total Environ 2021 Sep 11;805:150261. Epub 2021 Sep 11.

National Institute of Aquatic Resources, Technical University of Denmark, Øroddevej 80, 7900 Nykøbing Mors, Denmark.

We assessed the importance of boulder reefs to the oxygen dynamics of a shallow estuary during two growing seasons in 2017 and 2018. Using open-system diel oxygen measurements and benthic and pelagic incubations, we evaluated the relative contribution of pelagic and benthic habitats to the ecosystem metabolism along a depth gradient in two areas, with (Reef) and without (Bare) boulder reefs in the Limfjorden, Denmark. System integrated areal rates of gross primary production (GPP) and ecosystem respiration (ER) both increased with depth in both areas. Read More

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September 2021

Spatiotemporal occurrence, sources and risk assessment of polycyclic aromatic hydrocarbons in a typical mariculture ecosystem.

Water Res 2021 Sep 4;204:117632. Epub 2021 Sep 4.

State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, School of Marine Sciences, Ningbo University, 818 Fenghua Road, Ningbo 315211, PR China; School of Marine Sciences, Ningbo University, Ningbo 315211, PR China. Electronic address:

The spatiotemporal variations, influencing factors and potential sources, as well as the ecological/health risks of polycyclic aromatic hydrocarbons (PAHs) were systematically investigated in seawater, sediment, and fish from Xiangshan Bay, China, one of the most important and oldest domestic marine aquaculture bases. The average concentrations of Σ in seawater, sediment and fish were 150 ± 70.0 ng/L, 276 ± 271 μg/kg (dry weight, dw), and 434 ± 151 μg/kg (dw), respectively. Read More

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September 2021

Heavy Metals in the Blood Serum and Feces of Mugger Crocodile (Crocodylus palustris) in Sistan and Baluchistan Province, Iran.

Biol Trace Elem Res 2021 Sep 18. Epub 2021 Sep 18.

School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

This study was conducted to measure concentrations of cadmium (Cd), lead (Pb), arsenic (As), mercury (Hg), copper (Cu), chromium (Cr), and iron (Fe) in blood serum and feces of mugger crocodile (Crocodylus palustris) and in water and sediment of their habitat (Negour site, Chabahar County in Sistan and Baluchistan Province, Iran). Heavy metal contents in crocodile serum and feces, water, and sediments were analyzed by inductively coupled plasma optical emission spectrometry (ICP-OES spectrometer-Spectro Genesis). The highest levels of heavy metals in the mugger crocodile's serum were Fe > Hg > Pb > Cr > Cu > Cd > As, respectively. Read More

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September 2021

Historic land use and sedimentation in two urban reservoirs, Occoquan Reservoir and Lake Manassas, Virginia, USA.

Environ Sci Pollut Res Int 2021 Sep 18. Epub 2021 Sep 18.

Earth and Environmental Sciences, University of Mary Washington, Fredericksburg, VA, USA.

Human population growth and subsequent land use intensification are closely linked to contemporary increases in sediment and associated contaminants fluxes to fluvial systems, lakes, reservoirs, and coastal zones worldwide. In most urban areas, reservoirs that are the main source of fresh water supply, if not effectively managed, suffer from water quality decline and loss of capacity associated with accelerated siltation. This study analyzes watershed soil losses and sediment accumulation rates in two reservoirs in the Occoquan river basin, a sub-watershed of the Chesapeake Bay in the suburbs of the greater Washington, DC area. Read More

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September 2021

The current state of microplastic pollution in the world's largest gulf and its future directions.

Environ Pollut 2021 Sep 13;291:118142. Epub 2021 Sep 13.

Department of Biotechnology and Bioengineering, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Ciudad de México, Mexico. Electronic address:

Microplastics can have several negative consequences on a variety of organisms, and their prevalence in marine ecosystems has become a major concern. Researchers have recently focused their attention on the world's largest gulf, the Gulf of Mexico (GoM), to determine and assess the impact of microplastic pollution on various environmental compartments (i.e. Read More

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September 2021

Difference in temporal and spatial distribution pattern of cyanobacteria between the sediment and water column in Lake Chaohu.

Environ Pollut 2021 Sep 11;291:118163. Epub 2021 Sep 11.

State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China. Electronic address:

The evaluation about the relative distribution of cyanobacterial biomass between the sediment and water column would be indispensable to understand if benthic cyanobacteria are important to cyanobacterial biomass in the water column. A separation method for the rapid quantification of benthic cyanobacteria in Lake Chaohu was developed by density-gradient centrifugation. A 2 full factorial design and response surface methodology was employed to optimize the extraction protocol. Read More

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September 2021

Adsorption and migration of heavy metals between sediments and overlying water in the Xinhe River in central China.

Water Sci Technol 2021 Sep;84(5):1257-1269

Institute of Resources & Environment, Henan Polytechnic University, Jiaozuo 454003, China E-mail:

Long-term polluted rivers often lead to the accumulation of heavy metals in sediments. Anthropogenic activities or biological disturbances break the adsorption balance, causing them to return from the bottom mud to the overlying water and change the aquatic environment. In order to understand the variation of heavy metals between sediments and river water, we collected the riverbed sediments in the polluted Xinhe River and carried out static continuous infiltration and dynamic uninterrupted disturbance experiments. Read More

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September 2021

Halegenticoccus tardaugens sp. nov., an extremely halophilic archaeon isolated from a saline soil.

Extremophiles 2021 Sep 17. Epub 2021 Sep 17.

Key Laboratory for Industrial Microbiology of Henan Province, School of Biological and Chemical Engineering, Nanyang Institute of Technology, Nanyang, 473000, People's Republic of China.

Two extremely halophilic archaea, isolates SYSU A00711 and SYSU A00630, were isolated from a sediment soil sample collected from the Aiding lake, China. Cells of these isolates were cocci, non-motile and stained Gram-negative. They grew optimally at 37 °C, with 20-22% NaCl (w/v) and at pH 7. Read More

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September 2021

Metal biosorption by magnetotactic bacteria isolated from fresh water sediments and characterization of extracted magnetosomes.

Arch Microbiol 2021 Sep 16. Epub 2021 Sep 16.

Department of Microbiology, School of Biosciences, Periyar University, Salem, Tamil Nadu, 636011, India.

The focus of the present study is to isolate and identify magnetotactic bacteria from fresh water sediments in Salem region, Tamil Nadu. Fresh water sediments were collected and characterized by X-ray diffraction to detect the crystalline nature of particles. Totally 12 isolates were screened for the metal biosorption efficiency in modified nutrient agar plates with 10 mg (lower concentration) of four different metals viz. Read More

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September 2021

Limnological responses of a shallow tropical reservoir to recent incidence of hydro-climatic anomaly suggest potential challenges of future restoration efforts.

Environ Sci Pollut Res Int 2021 Sep 15. Epub 2021 Sep 15.

Aquatic Sciences, Fisheries and Aquaculture Stream, Department of Zoological Sciences, Addis Ababa University, Addis Ababa, Ethiopia.

The impact of El Niño-induced drought (2015/2016) on the limnology of Koka Reservoir was studied through a 1-year sampling with emphasis on nutrient concentration. The monthly concentration of riverine input of TP varied between 400 and 2872 mg/m, with a total annual load to the reservoir of 482012 × 10 mg. This resulted in annual areal load to the reservoir of 2410 mg/m. Read More

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September 2021

Influence of tied-ridge with biochar amendment on runoff, sediment losses, and alfalfa yield in northwestern China.

PeerJ 2021 25;9:e11889. Epub 2021 Aug 25.

College of Grassland Science, Gansu Agricultural University, Lanzhou, Gansu Province, China.

Background: Loss of organic matter and mineral nutrients to soil erosion in rain-fed agriculture is a serious problem globally, especially in China's Loess Plateau. As a result, increasing rainwater usage efficiency by tied-ridge-furrow rainwater harvesting with biochar is expected to improve agricultural productivity. Nonetheless, with limited knowledge on tied-ridge-furrow rainwater harvesting with biochar, small-scale farmers face the challenge of adoption, thus, the rationale for this study. Read More

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Microbial community of soda Lake Van as obtained from direct and enriched water, sediment and fish samples.

Sci Rep 2021 Sep 15;11(1):18364. Epub 2021 Sep 15.

Department of Medical Biology, Medical School, Atilim University, 06830, Ankara, Turkey.

Soda lakes are saline and alkaline ecosystems that are considered to have existed since the first geological records of the world. These lakes support the growth of ecologically and economically important microorganisms due to their unique geochemistry. Microbiota members of lakes are valuable models to study the link between community structure and abiotic parameters such as pH and salinity. Read More

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September 2021

Benthic bioturbation: A canary in the mine for the retention and release of metals from estuarine sediments.

Mar Pollut Bull 2021 Sep 8;172:112912. Epub 2021 Sep 8.

Department of Biology, University of Southern Denmark, Odense M 5230, Denmark. Electronic address:

After the largest mining tailings spill in Brazil, the Rio Doce estuarine ecosystem was severely impacted by metal contamination. In a 28-day laboratory experiment, we examined the effects of the polychaeta Laeonereis sp. on fluxes of oxygen and metal across the sediment-water interface. Read More

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September 2021

Environmental quality assessment in a marine coastal area impacted by mining tailing using a geochemical multi-index and physical approach.

Sci Total Environ 2021 Aug 25;803:149883. Epub 2021 Aug 25.

Laboratório de Geoquímica Ambiental e Poluição Marinha, Departamento de Oceanografia e Ecologia, Universidade Federal do Espírito Santo, Fernando Ferrari Avenue, 514, Goiabeiras, Vitória, ES 29055-460, Brazil.

Mining has been described as an important source of contaminants to the coastal zone worldwide, which is greatly intensified in the case of tailing dam ruptures. This study assessed the environmental quality of the marine coastal area impacted by a mining disaster (Fundão Mine dam collapse on 05 November 2015, Southeast Brazil) by applying a geochemical multi-index and physical approach over 18 months (from October 2018 to March 2020). Nutrients, metal(oid)s and Polycyclic Aromatic Hydrocarbons (PAHs) were integrated by quality indexes: Canadian Council of Ministers of the Environment Water Quality Index (CWQI) and the Pollution Load Index (PLI) for water quality; Sediment Quality Guideline Quotients (SQG-q metal(oid)s and SQG-q PAHs) for sediment quality. Read More

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Insights into the factors influencing mercury concentrations in tropical reservoir sediments.

Environ Sci Process Impacts 2021 Sep 15. Epub 2021 Sep 15.

Department of Environmental Science, Stockholm University, 106 91 Stockholm, Sweden.

Thousands of dams are currently under construction or planned worldwide to meet the growing need for electricity. The creation of reservoirs could, however, lead to conditions that promote the accumulation of mercury (Hg) in surface sediments and the subsequent production of methylmercury (MeHg). Once produced, MeHg can bioaccumulate to harmful levels in organisms. Read More

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September 2021

Seasonal occurrence, allocation and ecological risk of organophosphate esters in a typical urbanized semi-closed bay.

Environ Pollut 2021 Aug 30;290:118074. Epub 2021 Aug 30.

State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, China; Advanced Interdisciplinary Institute of Environment and Ecology, Beijing Normal University, Zhuhai, 519087, China.

In this study, water and sediment samples from the Jiaozhou Bay and surrounding rivers were collected to analyze the seasonal occurrence and allocation of 12 organophosphate esters (OPEs) and the associated ecological risk. The higher contamination of OPEs in the adjacent rivers indicated the impact of terrestrial input. Tris(1-chloropropan-2-yl) phosphate (TCIPP) was the predominant OPE in the four environmental sample groups investigated. Read More

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Efficacy of in situ active capping Cd highly contaminated sediments with nano-FeO modified biochar.

Environ Pollut 2021 Sep 7;290:118134. Epub 2021 Sep 7.

Research Center for Coastal Environment Engineering Technology of Shandong Province, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China; University of Chinese Academy of Sciences, Beijing, China.

Effective remediation of Cd polluted sediment is imperative for its potential damages to aquatic ecosystem. Biochar (BC) and nano-FeO modified BC ([email protected]) were conducted to remedy Cd highly contaminated sediments, and their performances, applicable conditions, and mechanisms were investigated. After 60 d capping, both BC and [email protected] capping inhibited Cd release from sediment to overlying water and porewater (reduction rates >99%). Read More

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September 2021