El-Wakil, A.M., W.M. Abou El-Maaty, and F. S. Awad. 2014. “Studies on Biosorption of Mercury (II) from Aqueous Solution on Nitric Acid Modified Activated Carbon Prepared from Water Hyacinth”. ABC Journal of Advanced Research 3 (1): 51-71. https://doi.org/10.18034/abcjar.v3i1.32.