Evaluation of Rice Husk Biochar Modified with Magnesium Oxide in Adsorbing Heavy Metals from Tannery Wastewater. Environmental Technology & Science Journal [Internet]. 2026 May 27 [cited 2026 Jun. 8];17(1):191-200. Available from: https://journal.futminna.edu.ng/index.php/etsj/article/view/250