Gửi tin nhắn: A highly efficient polyampholyte hydrogel sorbent based fixed-bed process for heavy metal removal in actual industrial effluent /Guiyin Zhou a , Jinming Luo b , Chengbin Liu a, * , Lin Chu a , Jianhong Ma c , Yanhong Tang d , Zebing Zeng a , Shenglian Luo a, **