Assessing Heavy Metal Contamination in Urban River Water: An Experimental Evaluation of Low-Cost Biochar Adsorption for Water Pollution Reduction. Libyan Open Univ J Appl Sci [Internet]. 2025 Dec. 28 [cited 2026 May 9];1(2):77-90. Available from: https://oujournals.ly/index.php/LOUJAS/article/view/245