From coconut shell to functional carbon: A review of thermochemical production, activation, and sustainability assessment of biochar - Marie Ganmo Koutchouo; Zhiliang Wu; Wenran Gao; Felix Mérimé Bkangmo Kontchouo; Yan Chen; Yuming Zhang; Zhongyuan Wang; Electo Eduardo Silva Lora; Shu Zhang (Journal of Environmental Chemical Engineering, 2026)