Author/Authors :
Bhakta، J.N نويسنده Department of Environmental Engineering, Faculty of Agriculture, Kochi University, B 200, Monobe, Nankoku, Kochi 783 8502, Japan , , Munekage، Y نويسنده Department of Environmental Engineering, Faculty of Agriculture, Kochi University, B 200, Monobe, Nankoku, Kochi 783 8502, Japan ,
Abstract :
The present investigation attempted to develop the ceramic adsorbent media in order
to remove the mercury from aqueous phase. Two ceramics, akadama volcanic ash soil-ceramic (A-
ceramic) and improved magnesium oxide impregnated akadama volcanic ash soil-ceramic (MA-
ceramic) were produced from raw akadama volcanic ash soil by heating process to determine the
Hg(II) adsorption capacity. Adsorption experiments of ceramics were performed as a function of
contact time, solution pH, adsorbent dosage and adsorbate concentration following the batch mode
operation. Results clearly revealed the adsorption capacity (265±8.5 µg/g) of MA-ceramic is
significantly higher (~12 times) than that of the A-ceramic material. The adsorption was largely pH
dependent and neutral pH was associated with higher mercury adsorption capacity in both ceramics.
MA-ceramic showed 94% and 86% desorption and resorption capacities, respectively.
