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Environmental Research
Volume 200, 2021, 111757

Bioremediation strategies with biochar for polychlorinated biphenyls (PCBs)-contaminated soils: A review

Soheil Valizadeha,1, Sang Soo Leeb,1, Kitae Baekc,1, Yong Jun Choia, Byong-Hun Jeond, Gwang Hoon Rheee, Kun-Yi Andrew Linf, Young-Kwon Parka

School of Environmental Engineering, University of Seoul, Seoul, 02504, Republic of Korea.

Abstract

Polychlorinated biphenyls (PCBs) are hazardous organic contaminants threatening human health and environmental safety due to their toxicity and carcinogenicity. Biochar (BC) is an eco-friendly carbonaceous material that can extensively be utilized for the remediation of PCBs-contaminated soils. In the last decade, many studies reported that BC is beneficial for soil quality enhancement and agricultural productivity based on its physicochemical characteristics. In this review, the potential of BC application in PCBs-contaminated soils is elaborated as biological strategies (e.g., bioremediation and phytoremediation) and specific mechanisms are also comprehensively demonstrated. Further, the synergy effects of BC application on PCBs-contaminated soils are discussed, in view of eco-friendly, beneficial, and productive aspects.

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