Electro-activated potassium ferrate pretreatment for micropollutant removal and membrane fouling mitigation: Insight into oxidation and foulant structural changes - Qibin Xu; Qinglin Zhang; Weiping Sima; Henjun Tang; Jian Tan; Yi Liao; Jianwei Dong; Rui Miao; Le Han; Chun Zhao (Journal of Environmental Chemical Engineering, 2026)