Removal of mercury(Ⅱ) from aqueous phase using ceramic

摘要

Serious risk of mercury (Hg) contamination in aquatic environment is the impetus of the present investigation. The present study attempted to remove Hg from aqueous solution using clay-ceramic (C-ceramic) as an adsorbent media. Hg adsorption capacity of C-ceramic was performed by batch mode adsorption study with the function of solution pH, contact time, C-ceramic doses and Hg concentration. Obtained results were analyzed for adsorption kinetics. C-ceramic exhibited the equilibrium state of maximum Hg adsorption at 120 min contact period. The adsorption of Hg was largely increased with increasing pH. The Hg adsorption capacity showed a decreasing trend with increasing dose of C-ceramic, whereas a reverse response of adsorption capacity was pronounced with increasing Hg concentration at pH 9.03. Adsorption data was well described by the Langmuir and the Freundlich isotherm models. Results demonstrated the adsorption capacity of C-ceramic was -445 μg/g. It, therefore, can be concluded that C-ceramic might be a low-cost and environmentally sound adsorbent for the treatment of Hg contaminated effluents.