contaminated surface water Articles
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Sustainability and the indispensability of politics: a study of sanitation partnerships in urban India
The chronic absence of hygienic sanitation for many urban Indians and the resultant contamination of surface water sources are a major cause for the poor environmental condition in most cities in India. In the past decade, public?private partnerships have been presented as an innovative strategy to rectify this pervasive problem. Numerous partnerships to improve sanitation have been launched in ...
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Transfer and translocation of organochlorine pesticide residues in an agricultural area of Romania
The study refers to translocation of some organochlorine persistent pesticides (Lindane, Aldrin, Endosulphane and DDT) in/from soil to surface and underground water and their accumulation in some crops in an agricultural area nearby Bucharest. The samples analysed were soil, surface water (Arges River) and underground water (wells). Pesticide residues were found especially in soil samples, in ...
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Higher alkyl sulfatase activity required by microbial inhabitants to remove anionic surfactants in the contaminated surface waters
Biodegradation of anionic surfactants, like sodium dodecyl sulfate (SDS) are challenged by some bacteria through the function of the enzyme alkyl sulfatases. Therefore, identifying and characterizing bacteria capable of degrading SDS with high alkyl sulfatase enzyme activity are pivotal. In this study, bacteria isolated from surfactant contaminated river water were screened for their ...
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Innovative Uses of Compost Bioremediation and Pollution Prevention
Each year agricultural effluents, industrial residues, and industrial accidents contaminate surface waters, soils, air, streams, and reservoirs. A new compost technology, known as compost bioremediation, is currently being used to restore contaminated soils, manage stormwater, control odors, and degrade volatile organic compounds (VOCs). Compost bioremediation refers to the use of a biological ...
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Fate and spatial variations of polybrominated diphenyl ethers in the deposition within a heavily urbanized area: case of Paris (France)
In this paper, we present the first results on the geochemical cycle of PolyBrominated Diphenyl Ethers (or PBDE) in the Paris Region (France). In order to provide information about the distribution and mobility of eight PBDE congeners, we first determined the level of contamination of different environmental compartments: i.e. atmosphere, soils and waters. Atmospheric PBDE deposition was ...
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Long-term behaviour of a gravity-driven dead end membrane filtration unit for potable water supply in cases of disasters
The frequentness of serious natural disasters will rise against the background of climate change in the next decades. One of the most severe impacts of natural disasters is the interruption of drinking water supply. Contaminated water causes the death of thousands of people worldwide every year. Mobile waterworks used by aid organizations are sophisticated systems with high demand of energy, ...
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Quantitative microbial risk assessment to estimate the health risk from exposure to noroviruses in polluted surface water in South Africa
This study assessed the risks posed by noroviruses (NoVs) in surface water used for drinking, domestic, and recreational purposes in South Africa (SA), using a quantitative microbial risk assessment (QMRA) methodology that took a probabilistic approach coupling an exposure assessment with four dose-response models to account for uncertainty. Water samples from three rivers were found to be ...
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Removal of 17β-estradiol (E2) and its chlorination by-products from water and wastewater using non-imprinted polymer (NIP) particles
Endocrine disrupting compounds and their chlorination by-products are two classes of emerging contaminants. Surface water and wastewater treatment technologies have limitations in removing these contaminants. This study evaluated the ability of non-imprinted polymer particles (NIP) to remove the endocrine disruptor 17β-estradiol (E2) and its chlorination by-products from water and wastewater. NIP ...
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A comprehensive comparison between OSE II, mechanical methods and chemical dispersants in Laymen’s terms
Introduction Oil Spill Eater 11 is the name of a non-toxic product which provides the means for moving oil spill response out of its current 19th Century methodology into the realm of advanced technological 21st Century breakthroughs for swiftly addressing and remediating 100% of any spill in any environment. In comparison, current response methods employed by three major oil companies - BP, ...
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Determination of perfluorinated compounds (PFCs) in solid and liquid phase river water samples in Chao Phraya River, Thailand
Perfluorinated compounds (PFCs), especially perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA), are fully fluorinated organic compounds, which have been used in many industrial applications. These chemicals have contaminated surface water all over the world even in developing countries like Thailand. The previous study showed the contamination in Chao Phraya River in 2006 and ...
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Effect of bioconcentration and trophic transfer on realized exposure to oxazepam in two predators, the dragonfly larvae (Aeshna grandis) and the Eurasian perch (Perca fluviatilis)
Psychoactive substances are used worldwide and constitute one of the most common groups of pharmaceutical contaminants in surface waters. While these pharmaceuticals are designed to be efficiently eliminated from the human body, we know very little about their trophic‐transfer potential in aquatic wildlife. Therefore, the goal of this study was to quantify and compare uptake of an anxiolytic ...
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Active sediment cap included in clean-up strategy at high-profile superfund site case study
Project: BROS Superfund Site Location: LOgan TOWTtsNp. NJ Products: Organoclay Reactive Core Mat BACKGROUND: Historical operations at the BROS Super-fund Site included waste oil storage, processing and disposal. The waste oil operations in addition to a major earthen dike breach in the 1970's resulted in extensive damage to plant life and significantly impacted approximately three acres of the ...
By CETCO
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In-situ stabilization of contaminated sediments at former pesticide facility case study
Project: West Doane Lake Location: Portland, OR Products: Organoclay® Organic Adsorption Media, Bentomat® ST Geosynthetic Clay Liner Background: Clean-up action was approved by the DEQ for contaminated sediments in West Doane Lake at the former Rhone Poulenc pesticide manufacturing facilitysite located in Northwest Portland. Contamination of lake sediments resulted from pesticide ...
By CETCO
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From Microbiotest to Decision Support System : an Assessment Framework for Surface Water Toxicity
Abstract : A decision framework for the site-specific detection of toxic effects of contaminants in surface waters is presented. Although the main objective of the development of this framework aimed at supporting water quality boards in their studies on polluted waters and sediments, it could also be of wider use. The decision framework is illustrated by means of a case study on a ditch that is ...
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Adsorption of As, B, Cr, Mo and Se from coal fly ash leachate by Fe3+ modified bentonite clay
Fly ash contains the potentially toxic elements As, B, Cr, Mo and Se which upon contact with water may be leached to contaminate surface and subsurface water bodies. This study aims to evaluate the adsorption of these elements from coal fly ash leachates on Fe3+-modified bentonite (Fe-Bent); such modification improved the physicochemical properties of bentonite clay. For optimization of ...
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Hydrogeochemical and isotopic characterization of groundwater at Žitný Island (SW Slovakia)
Hydrogeochemical investigations and spatial variations studies on the distribution of water isotopes and radiocarbon in the groundwater of Žitný Island (Rye Island) were carried out. Žitný Island represents the largest groundwater reservoir in Central Europe (about 10 Gm3). The chemical composition of the groundwater of Žitný Island depends mainly on the chemical composition of Danube water, ...
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Microbial degradation of N-methyl-2-pyrrolidone in surface water and bacteria responsible for the process
Due to widespread utilization in many industrial spheres and agrochemicals, N-methyl-2-pyrrolidone (NMP) is a potential contaminant of different surface water ecosystems. Hence, investigation was made into its aerobic microbial degradability in samples of water from a river, wetland area and spring. The results showed that the compound was degradable in all water types, and that the fastest ...
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Surface water polycyclic aromatic hydrocarbons (PAH) in urban areas of Nanjing, China
The concentration, sources and environmental risks of polycyclic aromatic hydrocarbons (PAHs) in surface water in urban areas of Nanjing were investigated. The range of ∑16PAHs concentration is between 4,076 and 29,455 ng/L, with a mean of 17,212 ng/L. The composition of PAHs indicated that 2- and 3-ring PAHs have the highest proportion in all PAHs, while the 5- and 6-ring PAHs were the least ...
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Safe Drinking Water for University in Kenya - Case Study
First SuMeWa|SYSTEM at Taita Taveta University College in Voi On the Campus of Taita Taveta University in Voi, Kenya a SuMeWa|TURB station was installed to serve the Campus with safe drinking water through several drinking water taps. The station has become necessary after a study conducted by the University and HTW Dresden has revealed pathogenic contamination of the water. The station treats ...
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Residual indicator bacteria in autosampler tubing: a field and laboratory assessment
Microbial contamination in surface waters has become a worldwide cause for concern. As efforts are made to reduce this contamination, monitoring is integral to documenting and evaluating water quality improvements. Autosamplers are beneficial in such monitoring efforts, as large data sets can be generated with minimized effort. The extent to which autosamplers can be utilized for microbial ...
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