A critical review : General toxicity and environmental fate of three aqueous cyanide ions and associated ligands.
Cyanides are'priority pollutants'under the Clean Water Act.
A number of Superfund sites, particularly mining and minerals processing sites, have released cyanide wastes to the environment.
Free cyanide is present in water from the dissolution of compounds such as sodium cyanate, potassium cyanide, and hydrogen cyanide.
The toxicity and fate of cyanide breakdown products, either during treatment or during natural degradation, is poorly understood.
Aqueous species of particular concern are cyanate (CNO-), thiocyanate (SCN-), and cyanogen chloride (CNCl-).
The toxicity of these compounds to aquatic life is highly variable depending on environmental conditions, including physicochemical and microbial influences.
Information pertaining to aquatic plant uptake of these cyanide ligands could not be located in the literature, while only a few studies addressing terrestrial plant uptake of cyanide (and only in the form of NaCN) could he found.
In order to adequately evaluate the environmental fate and associated toxicity to higher plants and animals, further studies need to be conducted.
Mots-clés Pascal : Etats Unis, Amérique du Nord, Amérique, Pollution, Environnement, Cyanate, Thiocyanate, Cyanogène Chlorure, Industrie extractive, Devenir polluant, Toxicité, Impact environnement, Animal, Végétal, Ecotoxicologie, Dégradation biologique, Activité microbienne, Article synthèse
Mots-clés Pascal anglais : United States, North America, America, Pollution, Environment, Cyanates, Thiocyanates, Cyanogen Chlorides, Mining industry, Pollutant behavior, Toxicity, Environment impact, Animal, Vegetals, Ecotoxicology, Biodegradation, Microbial activity, Review
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0133908
Code Inist : 001D16E. Création : 16/11/1999.