Abstract:

Organic chlorides ( OCs) are ubiquitous in aquatic environments,which pose a significant ecological risk. As some of them are persistent organic pollutants,more attention should be paid to their environmental behaviors and control strategies. In this paper,first,the sources of OCs are analyzed in terms of the discharge of chemical wastewater,the production and use of pesticides,the use and residue of polychlorinated biphenyl materials,the
generation of chlorination by-products,and the formation of dioxins from waste incineration,etc. Next,the pollution situations caused by OCs in water bodies,soils and sediments and the corresponding harm to human health and environment are summarized. Then,the approaches and principles concerning the safe transformation and control of OCs are reviewed in terms of biodegradation,adsorption and enrichment,supercritical catalytic reduction and resource utilization. Finally,the key issues for future studies on organic chloride degradation are discussed.

Key words: aquatic environment, organic chloride, persistent organic pollutant, pollution control