中文摘要：

多氯联苯（PCBs）是一类持久性有机污染物（POPs），因氯原子取代位置和数量的不同共有209种同系物。近年来，土壤中的PCBs污染问题已引起人们的广泛关注。由于PCBs具有高分子稳定性、低水溶性和颗粒相高吸附势，土壤基质中PCBs的去除极其困难。此外，PCBs的高憎水性和亲脂性使之易于在动物体脂肪组织和母乳富集。生物修复技术是指利用生物有机体（绿色植物、微生物和动物）的作用将环境中污染物转化为无害或低毒产物的过程。生物修复技术具有成本低、高效和环境安全等特征，被认为是可替代传统的土壤污染修复技术的最佳选择之一。因此，通过综述国内外土壤PCBs污染现状和健康效应，以及土壤PCBs污染的生物修复最新研究进展和相关修复机理，对微生物修复、植物修复和蚯蚓修复目前存在的问题和后续研究方向进行了讨论及展望，以期为今后生物修复PCBs污染土壤提供有益参考。

英文摘要：

Polychlorinated biphenyls（PCBs） are a class of persistent organic pollutants （POPs） and there are 209 PCB congeners identified as a function of chlorine numbers and position. In recent years, the pollution of PCBs in soils has aroused people＇s wide concern. PCBs are extremely hard to remove from soil matrix due to their high molecular stability, low solubility in water and high tendency to adsorb on partic- ulate phase. In addition, their high hydrophobicity and lipophilicity make them susceptible to be accumulated in adipose tissue and breast milk of animals.Bioremediation.is the process of converting the environmental contaminants into harmless or less toxic products by use of bi- ological organisms（ green plants, microorganisms and animals ）. Bioremediation, with the characteristics of low cost, high efficiency and high environmental safety, has been deemed asone of the most optimal alternative choices for traditional remediation of soil pollution. Therefore, the paper reviews the current pollution status and health effect of PCBs, the recent research progress on bioremediation of soil polluted by PCBs and relative mechanisms. Finally, the existing problems and future research directions of microbial remediation, phytoremediation and vermiremediation are discussed and prospected in the paper so as to provide useful references for bioremediation of soil contaminated by PCBs in the future.