The Role of Biochar in Reducing the Bioavailability and Migration of Persistent Organic Pollutants in Soil–Plant Systems: A Review - Ni Ni; Deyang Kong; Wenzhu Wu; Jian He; Zhengjun Shan; Juying Li; Yezhi Dou; Yueqing Zhang; Yang Song; Xin Jiang (Bulletin of Environmental Contamination and Toxicology, 2020)