K2CO3-modified graphene-like biochar as a sustainable peroxymonosulfate activator for tetracycline degradation: Insight into non-radical pathway and continuous-flow application - Qian Wang; Weigao Zhao; Meng Zhang; Suyun Chang; Dan Zhang; Jiangbo Huo; Anping Peng; Xinbo Zhang (Journal of Water Process Engineering, 2026)