toxic waste Articles

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An Introduction to Bioremediation and its Applications

by HPI Processes, Inc.  (Aug. 31, 2016)

A variety of toxic chemicals, metals, and effluents are created and used in industrial processes. These elements need to be degraded to ensure that they do not harm the environment when disposed. A specialized process and equipment are required to perform this task. This is where bioremediation comes in. What is Bioremediation, and what are its ...

GWT Electrocoagulation Wastewater Treatment – An Application To Sustainably Reuse Textile Wastewater

by Genesis Water Technologies, Inc  (Sep. 20, 2016)

The textile industry is a water consumption intensive industry. Water is utilized for cleaning the raw material, and for the different steps in the textile dyeing process. Due to the effects of water scarcity and stricter environmental regulations, the cost of fresh water utilization has increased worldwide. In addition, the textile industry is ...

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 ...

Plasma Methods for Technology Processing of Toxical Industrial Wastes

Experimental study of thermal neutralization of some toxic chlorine and bromine industrial wastes, as well as of pesticides with a expired term of validity was carried out in the three-jet plasma reactor . Different physical-chemical methods were used for analysis of products of waste processing. It was shown that plasma technology provides ...

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) ...

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 ...

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, ...

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 ...

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 ...

Daphnia magna wastewater toxicity assays: an interlaboratory study

by Inderscience Publishers  (Nov. 8, 2007)

In order to protect aquatic life, many acute and short-term chronic whole effluent toxicity (WET) tests have been employed for assessment of the toxicity of wastewater. Toxicity tests using biological responses to measure effects provide valuable information about the significance of chemical contamination. The response of an organism to ...

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

by IWA Publishing  (Oct. 19, 2012)

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). ...

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 ...

Sources and levels of potentially toxic elements in the biodegradable fraction of autoclaved non-segregated household waste and its compost/digestate

by SAGE Publications  (Oct. 1, 2008)

Waste that reflected the average UK composition of household waste was treated by autoclaving at the three set pressure/temperature levels of 2.7 bar/130 °C, 6.2 bar/160 °C and 15.5 bar/200 °C. The biodegradable fraction of the autoclaved household waste ('floc') was manually separated by screening and underwent characterization for its Cd, Cr, ...

Assessment of the physicochemical parameters and heavy metals toxicity of leachates from municipal solid waste open dumpsite

by Center for Environment and Energy Research & Studies (CEERS)  (Apr. 1, 2008)

Heavy metals and physicochemical characteristics of the different sites of the municipal solid waste dumpsite at Olusosun Landfill, Lagos, Nigeria, were investigated. The dormant site of the landfill has the potential of being a source of immediate environmental risk compared to the active and abandoned site, with the active site exhibiting ...

Background Concentrations of 18 Air Toxics for North America

by Air & Waste Management Association (A&WMA)  (Jan. 1, 2006)

ABSTRACT Of the 188 hazardous air pollutants, or 'air toxics,' identified by the U.S. Clean Air Act, 18 were targeted as the most important in a 10-city pilot study conducted in 2001 and 2002 as part of the National Air Toxics Trend Sites Program. This paper describes the pilot study. The U.S. Clean Air Act identifies 188 hazardous air ...

Need a swifter, safer way to mop up toxic waste? Blue goo may do.

by METIS Scientific  (Dec. 7, 2011)

Scouring radioactive waste usually means just that. Scrub with soap and water, pails and brushes. Repeat. If it sounds messy, it is—and dangerous too for those exposed to dust and contaminated wastewater.  Hawaii-based CBI Polymers says it's come up with a better way to clean up nuclear waste. The firm's blue goo may not look ...

It is time for changes in the analysis of whole effluent toxicity data

by John Wiley & Sons, Ltd.  (Nov. 18, 2011)

The whole effluent toxicity (WET) program in the United States, Canada, and other countries typically requires multi concentration testing of effluents. While multiconcentration testing of chemicals is desirable for regulatory and scientific reasons, we believe this requirement is not as efficient for evaluating effluent compliance in a WET ...

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