| Abstract |
| The heavy metal pollution of water around abandoned mines was observed in 2008. In that assessment, the highest concentrations of 88, 5, 116 and 244 ㎍/L of copper(Cu), cadmium(Cd), lead(Pb) and zinc(Zn), respectively, were found in water within 1km from the mine. Acrylic acid was graft polymerized onto plasma-treated cellulose filter papers to develop a sorbent capable of removing the heavy metals. The ability of the grafted sorbent to remove a mixture of Cu, Cd, Pb and Zn from synthetic mine-water samples was evaluated in batch test at a starting pH of 6.5. The sorbent dosage was set at 20g/L. The Freundlich isotherm model also explained the data. Three different grafting percentages of 42, 122 and 148 were used to evaluate the effect of grafting percentage on adsorption. The amount of metal adsorption decreased with increasing grafting percentage. The solid phase adsorption for the different grafting percentages decreased in the following order: Zn > Cu > (Cd = Pb). One gram of plasma-treated acrylic acid filter paper was capable of removing approximately 111, 39, 36 and 117㎍ of Cu, Cd, Pb and Zn, respectively. |
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| Key Words |
| Abandoned mine, Freundlich isotherm, Grafting, Metal removal, Oxygen plasma |
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