El-Wakil, A. , El-Maaty, W.A. and Awad, F.S. (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), pp. 51–71. doi:10.18034/abcjar.v3i1.32.