Synergistic visible-light photocatalysis and sulfite activation by iron-functionalized nitrogen-rich Enteromorpha prolifera biochar toward efficient tetracycline degradation - Shuhui An; Luchen Ai; Yijing Li; Dehui Xiao; Rongrong Han; Haonan Guo; Peng Ju; Houshen Li (Journal of Water Process Engineering, 2026)