ABSTRACT
PCBs are considered as a potential class of persistent organic pollutants (POPs) and mainly found in sediments and soil. In spite of its restriction of use, PCBs are extensively used in various industrial applications. Because of their less stability and low level of bioavailability, PCBs can persist in our ecosystem for a longer period of time and significantly affect biotic community along with the whole environment. There are different kinds of techniques used for the degradation of PCBs, which includes microbial degradation, dehalogenation through chemical reagent, phytoremediation, electrokinetic remediation. Among all these methods, the degradation by using the genetic system in soil bacteria is more efficient and sustainable. The remediation of PCBs through bacteria is a less expensive and green strategy to reduce PCBs. The fate of PCBs in soil is only the correlation between various biological processes. Rhizosphere offers a significant ecological niche in order to increase the degradation process of PCBs through rhizobacteria. The bacterial oxidative enzymes are responsible for the degradation of PCBs and provide increased catalytic activities for highly persistent PCBs. This technique of remediation of PCBs is still in undeveloped stage and its modification is required for better remediation or complete removal of such kind of highly toxic contaminants from our environment.
