多氯联苯(polychlorinatedbiphenyls,PCBs)是一组人工化学合成的氯代烃类化合物,为无色或淡黄色油状液体。PCBs难溶于水及有机溶剂,其最大特点是化学性质稳定,不易与酸、碱、氧化剂等作用,在环境中不易降解,以多种方式迁移,污染范围广。大气、土壤及农作物、雨水、海洋及海洋生 Polychlorinated biphenyls (PCBs) are a group of chemically synthesized chlorinated hydrocarbons that are colorless or light yellow oily liquids. PCBs are poorly soluble in water and organic solvents. The most prominent feature of PCBs is their stable chemical properties, which are not easy to react with acids, alkalis and oxidants. They are not easily degraded in the environment and migrate in various ways with a wide range of pollution. Atmosphere, soil and crops, rain, sea and marine life