Regulating nitrogen speciation via temperature/Fe2O3 synergy in freshwater sludge for enhanced peracetic acid (PAA) activation and emerging contaminants removal - Shanshan Liu; Danish Muhammad; Zizhe Keng; Peiyuan Chu; Yanqing Wu; Lingling Guo; Maya Zhang; Fei Wang; Jian Xu; Qiteng Zheng; Yunhui Zhang; Jianfeng Ye; et al. (Chemical Engineering Journal, 2025)