Freezing facilitates the non-radical activation of peroxydisulfate by β-MnO2 for contaminants degradation - Xuanying Cai; Tiansheng Chen; Zhenhua Dai; Peiren Ding; Yinhao Dai; Peng Fan; Jihong Xu; Yuankui Sun; Xiaohong Guan (Journal of Water Process Engineering, 2025)