water toxicity Articles

  • How to investigate mercury in the oceans?

    Mercury is a highly toxic metal that affects the environment and can endanger people's health, as a powerful neurotoxin. The combustion of coal, waste and fuel are releasing hundreds of tons of heavy metal into the atmosphere annually, and its sediment enters to soil and water. Mercury measurements are part of the EU project "Global Mercury Observation System". The long-term goal of this ...


    By Lumex Instruments Group

  • 99% of Interceptor contamination remediated - Case study

    What is an Interceptor Tank? An interceptor tank is a trap used to filter out hydrocarbon pollutants from rainwater runoff. It is typically used in road construction and on petrol station forecourts to prevent fuel contamination of the water table via runoff. Petrol interceptors work on the premise that some hydrocarbons such as petrol and diesel float on the ...


    By Slick Solutions

  • Chromium toxicity

    Chromium, in the form of unidentified chromium compounds, occurs naturally in the earth’s crust and is widely distributed in air, water, soil, and food. Chromium (3+) is an essential trace element in humans. The general population is exposed to some chromium (6+) compounds, but the levels of exposure vary. Environmental exposure specifically to chromium(6+) compounds is difficult to quantify, ...


    By Valahia University

  • Evaluation of the test of significant toxicity for determining the toxicity of effluents and ambient water samples

    The test of significant toxicity (TST) is a hypothesis‐testing approach based on bioequivalence developed by the U.S. Environmental Protection Agency (U.S. EPA) for analyzing whole‐effluent toxicity (WET) and ambient toxicity data. The present study compares results of acute and chronic toxicity tests of effluent, storm‐water, and ambient (i.e., receiving‐water) samples using both the TST and ...


    By John Wiley & Sons, Ltd.

  • Whole Effluent Toxicity Testing

    What is Whole Effluent Toxicity (WET) testing? Whole Effluent Toxicity (WET) testing is an important component of the U.S. Environmental Protection Agency’s (USEPA’s) integrated approach for detecting and addressing toxicity in surface waters. The National Pollutant Discharge  Elimination System (NPDES) permit program, authorized by the Clean Water Act, controls water pollution by ...

  • Emphasis Shifting to Toxicity Reduction

    Untitled Document Under the Clean Water Act (CWA), the U.S. Environmental Protection Agency (EPA) established the National Pollutant ...


    By Calgon Carbon Corporation

  • The 'whole-effluent' toxicity approach

    The identification and quantification of effluent toxicity plays an important role in the evaluation of harmful impacts on the aquatic environment. The aim of this study was to demonstrate the advantages of using the 'whole-effluent' toxicity approach compared to prediction of toxicity using key toxic compounds. An underestimation of 'whole-effluent' toxicity was always observed using bacteria, ...


    By Inderscience Publishers

  • The possible toxic effects of lead

    Lead is a chemical element in the periodic table that has the symbol Pb (Latin: plumbum) and atomic number 82. A soft, heavy, toxic and malleable lead is bluish white when freshly cut but tarnishes to dull gray when exposed to air, very dense metal which is very soft, highly malleable, ductile, and a relatively poor conductor of electricity. It is odourless. It is highly resistant to corrosion ...


    By Valahia University

  • Toxic metal ions in water and their prevalence in Uttarakhand, India

    Developmental activities, geological reasons and mixing of industrial wastes are responsible for the deteriorating quality of surface and ground water in the Himalayan state of Uttarakhand. The drinking water sources of 13 districts of Uttarakhand have been assessed for the presence of four toxic metal ions (arsenic, cadmium, chromium and lead). The health aspects of the four metal ions have ...


    By IWA Publishing

  • Toxicity evaluation of polymeric ferric sulphate

    Toxicity evaluation of water treated with polymeric ferric sulphate (PFS), an aluminium-free coagulant, was conducted in this research. Six-week old male F344/N rats exposed to PFS-treated water for three months did not show any obvious pathology as observed histologically or in clinical chemistry compared to rats given tap water. There was no significant difference in body weight gain in the ...


    By Inderscience Publishers

  • Toxicity of fluoride to aquatic species and evaluation of toxicity modifying factors

    A study was performed to investigate the toxicity of fluoride to a variety of freshwater aquatic organisms and to establish whether water quality variables contribute substantively to modifying its toxicity. Water hardness, chloride and alkalinity were tested as possible toxicity modifying factors for fluoride using acute toxicity tests with Hyalella azteca and Oncorhynchus mykiss. Chloride ...


    By John Wiley & Sons, Ltd.

  • Assessment of toxicity of solid waste in landfill dumpsite by the toxicity characteristic leaching procedure

    The concentrations of Pb, Cd, Cr, Sb, Fe, Zn, Ca, Cu, Ag, Ba and Hg, present in solid wastes of Pallavaram municipality landfill dumpsite located in Chennai were determined and their toxicity was assessed using the toxicity characteristic leaching procedure (TCLP) developed by the US Environmental Protection Agency (USEPA). The TCLP method is a currently recognised international method for ...


    By Inderscience Publishers

  • A comparative study of perchlorate degradation in acute toxicity and chronic toxicity

    Since the discovery of perchlorate in water system, the public has been concerned about its human health effect. In practice it was reported that chronic exposure to perchlorate may lead to damage in thyroid hormone activity. This study introduced a method of perchlorate reduction, using autotrophic bacteria which utilise hydrogen as an electron donor. Two experiments were conducted to compare ...


    By IWA Publishing

  • The true toxicity of combined pollutants in freshwater

    Aquatic organisms are exposed to many stressors, including a variety of pollutants from human activities. New research suggests that commonly used models in toxicological studies can fail to adequately predict the range of effects of complex mixtures of chemicals in aquatic environments. Stress caused by combinations of man-made pollutants found in water systems can compound the effects of ...

  • Cadmium potentiates toxicity of cypermethrin in zebrafish

    Co‐occurrence of pesticides such as synthetic pyrethroids (SPs) and metals in aquatic ecosystems raises concerns over their combined ecological effects. Cypermethrin (CP), one of the top five SPs in use, has been extensively detected in surface water. Cadmium (Cd) has been recognized as one of the most toxic metals and is a common contaminant in the aquatic system. However, little information ...


    By John Wiley & Sons, Ltd.

  • AquaFinesse USA_Aquatic Toxicity Test Results.

    The recommended dose rate for Cool Puck is one 53gram puck for 20.000 L of water, wich translates to a theoretical maximum dose rate of 2.65 mg/L. All of the above (see page 2 PDF- schedule) toxicity results are greater than the recommended dose rate. C. dubia was the most sensitive organism to the product, with an acute effects level approximately 16-fold above the product's recommended dose ...


    By Special Water Europe B.V.

  • Indigenous people fight toxics in Arctic

    The fourth meeting of the United Nations Environment Programme’s Conference of the Parties of the Stockholm Convention on Persistent Organic Pollutants opened today in Geneva, Switzerland to discuss restricting and phasing out the world’s most dangerous chemicals. Representatives from Indigenous communities of the Arctic greeted the delegates with drumming and traditional songs to remind them of ...

  • Characterising and identifying toxicants in marine waters: a review of marine toxicity identification evaluations (TIEs)

    One impact of human activity is contamination of the world’s oceans with toxic pollutants. Marine toxicity identification evaluation (TIE) technology provides an approach for characterising and identifying the causes of toxicity in aqueous and sediment samples. This review describes the evolution and use of marine TIEs since their initial development approximately fifteen years ago. Currently, 30 ...


    By Inderscience Publishers

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