Sulfur-doped cyanobacterial biochar-supported Co-Fe spinel oxide with enriched oxygen vacancies: overcoming redox and electron transfer limitations in Fenton-like sulfadiazine removal - Chen He; Yaling Dai; Jinwei Wang; Zhiguo Lin; Linxin Zhao; Fengzhi Jiang; Xia Luo; Siping Ji; Xiangjun Yang (Bioresource Technology, 2026)