Hassoon Ali, Ahmed, Hadi Ghali Attia, and Farah Faisal Muhaisan. 2014. “Modification Of The Granular Activated Carbon And Its Effect On Removal Of Cr(VI) From Aqueous Solution In Batch And Fixed-Bed Systems”. Journal of Engineering and Sustainable Development 18 (1): 78-94. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/851.