Distribution, sources, and ecological risk assessment of HCHs and DDTs in water from a typical coal mining subsidence area in Huainan, China - Xiaoqing Chen; Liangmin Gao; Youbiao Hu; Leilei Luan; Rongrong Tong; Jinxin Zhang; Hui Wang; Xiaofang Zhou (Environmental Science and Pollution Research, 2022)