| 산업폐기물 중의 유해중금속의 환경친화적 안정화 처리(I) |
| 원종한, 안태호1, 최광휘, 최상흘, 손진군2, 심광보 |
한양대학교 세라믹공학과
1경기화학공업(주) 연구개발센터
2포항산업과학연구원 자원활용연구팀 |
| Environmentally Adaptive Stabilization of the Hazardous Heavy Metal Waste by Cementious Materials(I) |
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| ABSTRACT |
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The solidification/stabilization mechanism of each cementious material was investigated. It was found that when $C_3$S was hydrated , the Pb element could be transferred to the insoluble Ca[Pb(OH)$_3$.$H_2O$]$_2$and the Cr element to the CaCr $O_4$$H_2O$. The addition of heavy metal tends to delay the hydration until initial 7 days. The Pb element as also delayed the hydration and the Cr element was substituted for the ettringite. On the occasion of the hydration of $C_4$ $A_3$ $S^{S}$, the Pb and Cr ions were solidified/stabilized by the substitution into the ettringite and/or monosulfate. Leaching of the Pb, Cr and Zn elements in the solidified material was extremely little, indicating that heavy metals were effectively solidified/stabilized in the hydrated cementious materials. Solidification/stabilization of heavy metal ions in the industrial wastes such as the STS, BF and COREX sludge was investigated. In case of the mixing ratio of cement and slag was 3 : 7, leaching of hazardous heavy metal ions was very little, indications that the solidification and stabilization was very successful.l. |
| Key words:
Solidification and stabilization, $C_3$S, $C_3$A, $C_4$$A_3$S, Sludge |
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