Gebrearegay A, Tesfaye M, Gizaw A. Fixed-Bed Column Cr(VI) Removal by Acid-Modified Cordia africana Sawdust from Synthetic and Industrial Wastewater. EJSSD [Internet]. 1Aug.2026 [cited 2Aug.2026];13(2):71-7. Available from: https://ejssd.astu.edu.et/index.php/EJSSD/article/view/1278