摘要
六氯苯(HCB)是环境中典型的持久性有机污染物(POPs)。土壤是HCB的主要贮存场所,研究土壤中HCB的迁移转化规律对揭示其环境效应有重要意义。本文从以下几方面综述了土壤中HCB的主要迁移转化过程:土壤中累积的HCB不断向大气挥发而造成空气污染;土壤对HCB的吸附影响其在环境中的迁移转化速率;HCB通过多种化学键与土壤形成结合残留,暂时降低其生物有效性;厌氧条件下,HCB可发生还原脱氯降解,使其毒性和持久性大大降低。本文最后展望了关于土壤中HCB迁移转化的下一步研究方向。
Hexachlorobenzene （HCB） is one of the persistent organic pollutants （POPs）. Soil is the mainly storage location for HCB, thus studying the transfer and transformation of HCB is meaningful, for elucidating its environmental effect. This article reviewed the mainly transfer and transformation processes of HCB in soils from the following aspects： the accumulative HCB in soils could volatilize into air continuously, and then lead to air pollution; the adsorption of HCB by soil had significant effect on its transfer and transformation rates; the bound residue of HCB formed by diverse chemical bonds with soils could decrease the bioavailability of HCB temporarily. HCB could be dechlorinated in anaerobic conditions and its toxicity and persistence could be hence highly decreased. Finally, the further study areas about the transfer and transformation of HCB were prospected.
出处
《土壤》
CAS
CSCD
北大核心
2014年第1期29-34,共6页
Soils
基金
国家自然科学基金项目(41201314
41001134)
土壤与农业可持续发展国家重点实验室开放课题项目(0812201227)资助
关键词
土壤
六氯苯
迁移
降解
Soils, Hexachlorobenzene, Transfer, Degradation
