Efficient degradation of diclofenac by FeS2-Cu2S activated peroxymonosulfate: Performance and mechanism - Chaoyang Tang; Jingyu Liu; Yongyou Hu; Yan Liu; Yueyue Shi; Jianhua Cheng; Xiaoqiang Zhu; Guobin Wang; Jieyun Xie (Journal of Cleaner Production, 2025)