Adsorption of Mercury (II) Ions from Aqueous Solution by Activated Carbon Prepared from Morinda Citrifolia

Abstract

Mercury is one of the toxic contaminant in the environment and a major concerm in world wide.In this paper the use of morinda citrifolia bark as adsorbent for the removal of Hg(II) ions from aqueous solution in the batch system was studied . Acid treated activated carbon (AMC) was investigated for the removal of Hg(II) from aqueous solution as batch experiments by varying initial concentration, adsorbent dosage, pH, equilibrium time and temperature. A maximum removal of 92% was achieved with an initial Hg (II) concentration of 2 mg/L, pH -5 and adsorbent dose of 0.8 g/ L. The obtained experimental data were fitted to Langmuir and Freundlich equilibrium isotherm models. Both the models were found to provide a better fitting with coefficient of regression .