Behaviour of cyanides in soil and groundwater : A review.
Most people associate the word cyanide with an extremely dangerous and fast-acting poison.
However, there are several cyanide species, of varying toxicity, depending on the source to cyanide contamination.
The most important cyanide compounds, as well as the most important sources of cyanide contamination in soils and groundwater are discussed.
Toxicological and analytical aspects of cyanide containing compounds are briefly touched.
The behaviour of cyanide compounds in soil and groundwater is governed by many interacting chemical and microbial processes.
Redox conditions and pH are of importance for the leaching and degradation of iron cyanide complexes.
Free cyanide is degraded under both aerobic and anaerobic conditions, while documentation of the degradability of iron cyanide complexes only exists under aerobic conditions.
The risk associated to the cyanide contained in the different types of sources is evaluated.
At gas work sites, where cyanide is mainly present as iron cyanide complexes, the risk for effects on humans from exposure to cyanide compounds seems to be of minor relevance.
Mots-clés Pascal : Article synthèse, Pollution sol, Pollution eau, Eau souterraine, Cyanure, Source pollution, Devenir polluant, Dégradation chimique, Dégradation biologique, Activité microbienne, Mécanisme réaction, Aérobiose, Anaérobiose, Toxicité, Homme, Ecotoxicologie, Impact environnement, Analyse risque
Mots-clés Pascal anglais : Review, Soil pollution, Water pollution, Ground water, Cyanides, Pollution source, Pollutant behavior, Chemical degradation, Biodegradation, Microbial activity, Reaction mechanism, Aerobiosis, Anaerobiosis, Toxicity, Human, Ecotoxicology, Environment impact, Risk analysis
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0516143
Code Inist : 001D16D02. Création : 18/05/2000.