| 처리조건에 따른 중금속 이온의 안정화 거동 |
| 엄태호, 김유택 |
| 경기대학교 재료공학과 |
| Stabilization Behavior of Heavy Metal ions by Treatment Conditions |
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| ABSTRACT |
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Cation exchange capacity of clay, white clay and zeolite was measured by the adsorption test for 3 different heavy metal (Cd, Cr, Zn) standard solutions whose concentrations were varied by 10, 20, 30 ppm and pH were varied by 3, 5, 7, 9, respectively. The adsorption rate of Cd and Zn increased with increasing pH and slowly increased with increasing pH above pH 5. However, adsorption rate of Cr did not increase with increasing pH. Especially, Cr adsorption rate of the mixture of clay and white clay at pH 5 showed an half decrease compared to that at pH 3. The adsorption rate of mixed heavy metal solutions was in the order of Cd, Zn > Cr; however, the order was changed by Fe>Pb, Cu>Cr>Zn>Cd in case of Cu, Fe and Pb addition. |
| Key words:
Cation exchange capacity, Heavy metal adsorption, pH, Clay, White clay, Zeolite |
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