Simultaneous removal of Cr(VI) anions and metal cations by EDTA-crosslinking-chitosan/polypyrrole composites. - Shi, Yongli; Feng, Jie; Zhang, Zhaoxin; Cao, Ningning; Li, Jiahao; Li, Heping; Li, Linji; Hua, Quanxian; Ma, Qun; Zhang, Kai (Separation & Purification Technology, 2023)