toxic waste Articles

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Chromium toxicity

by Valahia University  (Aug. 17, 2007)

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 ...

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

by Inderscience Publishers  (Jun. 2, 2014)

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 ...

Eco-toxicity of oily wastes containing TENORM

by Inderscience Publishers  (Aug. 5, 2014)

Oily wastes are considered as one of the most hazardous waste types. Additionally to petroleum components, they can contain radioactive elements. This study aimed to estimate the toxicity of four raw and two treated waste samples obtained from petroleum production yard. Eight elutriate bioassays using plants ( Raphanus sativus and algae ...

Toxic and Hazardous Materials in Electronics

by Five Winds International L.P.  (Jan. 1, 2002)

Untitled Document Introduction In October 2000 Environment Canada released a report called Information Technology (IT) and Telecommunications (Telecom) ...

The environmental pyramid: a new way to deal with solid toxic waste

by Inderscience Publishers  (Jun. 4, 2008)

Our society produces large volumes of solid waste, including toxic chemical waste. For toxic solids, the current disposal practice is to dump them into isolated, lined pits, and cover them with a water-impermeable layer with a soil layer on top. Such waste deposits require 'eternal' control and monitoring, because they eventually do leak, ...

Mercury recovery from industrial waste and toxic residues of natural gas drilling

by econ industries GmbH  (Oct. 12, 2009)

econ's client in the east of Germany is one of the few specialised companies in Europe for the treatment of mercury contaminated waste. Typical input material for this type of treatment is sludge from the natural gas industry or other residues from chemical processes, i.e. contaminated filter cake from waste water treat-ment. Among their most ...

Assessment of Acute Toxicity to Treatment Plants

by Challenge Technology  (Jan. 1, 2003)

Assessment of Acute Toxicity to Treatment Plants Situations often occur where rapid assessment of potential toxicity to a treatment process is needed, for example, when hauled wastes are discharged to treatment plants. In these cases, the test wastewater is added in various ratios to a mixed liquor suspension along with an organic substrate that ...

Toxicity management: it's a bug's life

by Strathkelvin Instruments Ltd.  (Sep. 1, 2002)

Untitled Document Most biological treatment plants that accept industrial wastewaters expirience problems from time to time with ...

The true toxicity of combined pollutants in freshwater

by European Commission, Environment DG  (Sep. 29, 2008)

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 ...

Effects of climate change on the toxicity of soils polluted by metal mine wastes to Enchytraeus crypticus

by John Wiley & Sons, Ltd.  (Nov. 13, 2014)

The present study aimed to assess the effects of climate change on the toxicity of metal‐polluted soils. Bioassays with Enchytraeus crypticus were performed in soils polluted by mine wastes (mine tailing, forest and watercourse) and under different combinations of temperature (20 and 25 °C) and soil moisture content (50 and 30% of the soil ...

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