W-doping enhanced cobalt sulfide catalyzing PMS-mediated phenol degradation: Performance optimization, mechanism analysis and toxicity verification - Xinyu Qi; Yuanli Lu; Xiang Bai; Jing Sun; Tianshuo Liu; Shupeng Mi; Tingting Shen; Chen Wang; Qing Feng; Xiaoguo Shi; Qinglin Wang; Dao Xiao; et al. (Journal of Water Process Engineering, 2026)