Adsorption Removal of Cr(VI) with Activated Carbon Prepared by Co-pyrolysis of Rice Straw and Sewage Sludge with ZnCl2 Activation. - Fan, Liangqian; Wan, Wenxin; Wang, Xianda; Cai, Jie; Chen, Fenghui; Chen, Wei; Ji, Lin; Luo, Hongbing; Cheng, Lin (Water, Air & Soil Pollution, 2019)