Carbonaceous materials mediate redox reactions of chlorinated hydrocarbons in aqueous solution: environmental implications

摘要

Carbonaceous materials (e.g.,activated carbon,black carbon,and biochars) are often added to contaminated soils and sediments to sequester organic contaminants in situ.It has been argued that this approach is an effective measure to reduce the bioavailability and thus the risks of contaminants in soils and sediments.While it is often assumed that contaminants sorbed to carbonaceous materials are inert and non-labile,several studies have indicated that carbonaceous sorbents can mediate,or even catalyze,environmentally relevant reactions of organic contaminants.If the strong sorption of organic contaminants to carbonaceous materials can be coupled with the further reduction of sorbed contaminants,then the risks of contaminants in soils/sediments can be further reduced.