organic pollutant Articles
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Persistent Organic Pollutants (POPs) in leachates from municipal landfills
The leachates from six municipal waste landfills, located in South-eastern Poland, were studied for the presence of major, Persistent Organic Pollutants (POPs) – PAHs, Polychlorinated Dibenzo-p-dioxins (PCDDs)/Polychlorinated Dibenzofurans (PCDFs), Polychlorinated Dibenzothiophenes (PCDTs) and Polybrominated diphenyl ethers (PBDEs). The measured concentrations varied with respect to the ...
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Immobilization of organic pollutants in cement pastes admixed with organophilic materials
The results of 2-chloroaniline (2-CA) immobilization experiments in cement matrices, using an organophilic clay modified with phenolic resins as pre-sorbent, are shown. The 2-CA suspended in water was kept in contact with the organoclay for 24 h, and the slurry obtained was then admixed with ordinary Portland cement (OPC) without additional water, to obtain a firm solid waste. Six cement—clay ...
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Evaluation Of Toxic Effects Exhibited By Organic Pollutants Present In Soil
Abstract: Bioassays are widely applied to measure toxic effects of aquatic samples such as surface water and groundwater, leachates and elutriates, as well as sediments, sludges, and soils. Contrary to (eco)toxicity tests, which translate single chemical concentrations into toxic effects (dose-response relationship giving NOEC, EC50, etc.), bioassays are applied to samples from contaminated ...
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Property improvements of nano TiO2 in photodegradation of organic pollutions: a review
Nano TiO2 as a potential photocatalyst has been widely studied for application of environmental decontamination. In this paper, we examine and review the efforts in property improvements by modification, synthesis technique and operation parameter combined with some theory analysis. The effects of the modification by coupling with precious metal and narrow semiconductor, and doping with N, S, ...
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Abatement of organic pollutants using fly ash based adsorbents
The presence of organic pollutants in the environment is of major concern because of their toxicity, bio-accumulating tendency, threat to human life and the environment. It is a well-known fact that, these pollutants can damage nerves, liver, and bones and could also block functional groups of essential enzymes. Conventional methods for removing dissolved pollutants include chemical ...
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Screening of organic contaminants in urban snow
Snowmelt is known to cause peak concentrations of pollutants, which may adversely affect receiving water quality. High concentrations of metals and suspended solids in snow have been reported, whereas studies on organic pollutants are rare. This study aims at investigating the occurrence of anthropogenic organic compounds in urban snow in Gothenburg (Sweden). The most frequently detected organic ...
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TSCA, Treaties and Talk of Amendment
Untitled Document On July 29, 2003, the U.S. Senate Environment and Public Works (EPW) Committee approved legislation that would amend the Toxic Substances Control Act (TSCA) to allow the United States to ratify several international treaties intended to control persistent organic pollutants (POPs) and other hazardous substances. This column ...
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How Waste-to-Energy Can Restore Our Earth
Treating wastewater with anaerobic digestion converts organic pollution into a valuable asset Since 1970, Earth Day has been held each year on April 22 to demonstrate support for environmental protection. This year’s theme is Restore Our Earth, which focuses on “natural processes, emerging green technologies, and innovative thinking that can restore the world’s ...
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Using UV Fluorescence technology to monitor for organic pollutants in Flood Water
For many years the water industry has relied on traditional sampling techniques to monitor water quality in a wide range of environments. Traditional tests such as BOD, PH, Dissolved Oxygen and Ammonia have formed the bedrock of monitoring parameters. There is however other ways to establish water quality and UV fluorescence offers an up to date solution for the investigation of Organic ...
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Synthesis of ZnO-CuO/MCM-48 photocatalyst for the degradation of organic pollutions
The photocatalytic properties of ZnO-CuO catalysts supported on siliceous MCM-48 (Mobil Composition of Matter No. 48) for the degradation of organic pollutions such as methylene blue and salicylic acid under UV light irradiation were investigated. These catalysts were prepared by impregnation of MCM-48 with a mixed aqueous solution of copper acetate and zinc acetate. X-ray diffraction, ...
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Preparation and selective adsorption of organic pollutants by an inorganic molecular imprinted polymer
A novel inorganic molecular imprinted polymer (MIP) was synthesized by adding Al3+ to the Fe/SiO2 gel with Acid Orange II (AO II) as the template. The MIP was characterized by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy and nitrogen adsorption-desorption measurement. Compared with the non-imprinted polymer (NIP), the MIP enhanced the adsorption ...
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Kinetics of enhanced adsorption by polarization for organic pollutants on activated carbon fiber
The adsorption kinetics for model pollutants on activated carbon fiber (ACF) by polarization was investigated in this work. Kinetics data obtained for the adsorption of these model pollutants at open-circuit, 400 mV, and −400 mV polarization were applied to the Lagergren equation, and adsorption rate constants (K a) were determined. With the anodic polarization of 400 mV, the capacity of ...
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Use of mosses to study atmospheric deposition of trace elements: contributions from investigations in Norway
This paper presents essential features of biomonitoring work carried out in the author's laboratory during more than 25 years using various analytical techniques for the determination of over 50 elements. A substantial part of this work concerns large-scale deposition surveys in Norway using the moss Hylocomium splendens, where five nationwide surveys have been carried out since 1977. ...
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Transformation characteristics of organic pollutants in Fered-Fenton process for dry-spun acrylic fiber wastewater treatment
The Fered-Fenton process using Ti sheet as cathode and RuO2/Ti as anode was employed for the pretreatment of dry-spun acrylic fiber manufacturing wastewater. The effects of feeding mode and concentration of H2O2 on chemical oxygen demand (COD) removal efficiency as well as the biodegradability variation during the Fered-Fenton process were investigated. The feeding mode of H2O2 had significant ...
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Effect of root exudates on pentachlorophenol adsorption by soil and its main chemical components
The relationship between root exudates (REs) and the adsorption of organic pollutants has important impacts on phytoremediation of organic contaminated soil. The effect of REs collected from alfalfa (Medicago sativa Linn.) on pentachlorophenol (PCP) adsorption by soil and its main chemical components was investigated. The experimental results indicated that the data of PCP adsorption was fitted ...
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Spatial and temporal variations of water quality in an artificial urban river receiving WWTP effluent in South China
Urban wastewater treatment plant (WWTP) effluent as reclaimed water provides an alternative water resource for urban rivers and effluent will pose a significant influence on the water quality of rivers. The objective of this study was to investigate the spatial and temporal variations of water quality in XZ River, an artificial urban river in Shenzhen city, Guangdong Province, China, after ...
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A novel PSB-EDI system for high ammonia wastewater treatment, biomass production and nitrogen resource recovery: PSB system
A novel process coupling photosynthetic bacteria (PSB) with electrodeionization (EDI) treatment was proposed to treat high ammonia wastewater and recover bio-resources and nitrogen. The first stage (PSB treatment) was used to degrade organic pollutants and accumulate biomass, while the second stage (EDI) was for nitrogen removal and recovery. The first stage was the focus in this study. The ...
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White Paper on chemicals and Stockholm Convention on persistent organic pollutants: perspectives for environmental risk management
The ever-growing attention to the environmental risk assessment of chemical substances has had considerable repercussions in the recent agreements reached within the European Union and on the international stage. In the conclusions on the European Commission's White Paper Strategy for a Future Chemicals Policy, the Council of the European Union recently referred to the need to include persistent, ...
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What is COD in water?
Chemical oxygen demand (COD) is a chemical method to measure the amount of reducing substances that need to be oxidized in a water sample. Oxygen equivalent of substances (usually organic) that can be oxidized by strong oxidants in wastewater, wastewater treatment plant effluent and contaminated water. In the study of river pollution and industrial wastewater properties and the operation and ...
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Fate of hydrocarbon pollutants in source and non-source control sustainable drainage systems
Sustainable drainage (SuDs) is an established method for managing runoff from developments, and source control is part of accepted design philosophy. However, there are limited studies into the contribution source control makes to pollutant removal, especially for roads. This study examines organic pollutants, total petroleum hydrocarbons (TPH) and polycyclic aromatic hydrocarbons (PAHs), in ...
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