فهرس المقالات bio adsorbent حرية الوصول المقاله صفحة الملخص نص كامل 1 - Review and Modelling of Hexavalent Chromium Removal Efficiency of Bio-Sorption and Activated Carbon for Waste Water Treatment Desalegn Akuma Abraham Bayu Temesgen Amibo 10.30495/ijm2c.2021.684819