Enhanced degradation of sulfonamides by copper and cuprous oxides activated ferrate (VI) synergistically: Mechanism and applicability - Linsheng Liu; Yishun Wang; Yudan Zhang; Ping Chen; Dezhu Liu; Mengyang Niu; Junle Jian; Zihong Xu; Siling Zhang; Wenying Lv; Guoguang Liu (Journal of Environmental Chemical Engineering, 2024)