Dagnew, T. . and Bantie, Z. . (2025) “Process optimization of Cr(VI) removal from aqueous solution using activated orange peel for treatment of tannery wastewater”, Ethiopian Journal of Science and Technology, 16(1), pp. 51–75. Available at: https://journals.bdu.edu.et/index.php/EJST/article/view/2891 (Accessed: 4February2026).