Lithium recovery from clay lithium deposits using ammonium persulfate: Process and mechanism study - Zhixiang Li; Luxiang Ma; Weiqing Lai; Jiacheng Li; Chunxi Hai; Yanxia Sun; Shengde Dong; Xin He; Qi Xu; Yuan Zhou; Xiwei Qin; Yuliang Ma (Chemical Engineering Journal, 2026)