Assessing Heavy Metal Contamination in Urban River Water: An Experimental Evaluation of Low-Cost Biochar Adsorption for Water Pollution Reduction. Libyan Open University Journal of Applied Sciences (LOUJAS), [S. l.], v. 1, n. 2, p. 77–90, 2025. DOI: 10.65422/loujas.v1i2.245. Disponível em: https://oujournals.ly/index.php/LOUJAS/article/view/245. Acesso em: 9 may. 2026.