Advancing water remediation through hydrochar supported photocatalysis: A comprehensive review of mechanisms, physicochemical properties, and process insights - Zhao Ying Chiow; Chin Wei Lai; Boon Hoong Ong; Ethan Dern Huang Kong; Jing Chang Chia; Irfan Anjum Badruddin; Amit Kumar; Chi-Ching Kuo (Journal of Water Process Engineering, 2026)