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한국하천호수학회 / v.38, no.4, 2005년, pp.334-334 
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건조 가열처리가 청초호 퇴적물 중 중금속의 화학적 존재형태에 미치는 영향
( Effects of Drying and Heating on the Chemical Species of Heavy Metals in Lake Chungcho Sediments ) |
| 전상호;박길옥;김휘중;안혜정;김신희; 강원대학교 환경학과;강원대학교 환경학과;강원대학교 환경학과;남칼리포니아대학 약학부;오클라호마대학 식품영양학과;
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| 초 록 |
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| The chemical forms of Cd, Cu, Pb, and Zn were analysed by sequential extraction technique to evaluate the effects of drying and heating of dredged sediments from Lake Chungcho. The most abundant fraction of Cd, Cu, and Zn in the wet and untreated sediment was organic/sulfidic fraction that is stable in reducing environment such as the bottom condition of Lake Chungcho, while Pb dominated in residual function. This means that the source of Cd, Cu, and Zn in the Chungcho lake sediment is related to the organic degradation and Pb to the erosion from surrounding rocks. With drying and oxidation by dredging, heating treatment, and disposal of the lake sediment, the chemical forms of studied metals changed greatly from organic/sulfidic function to adsorbed and reducible fractions which are move labile in oxygenated environment. Organic/sulfidic fraction of Cd. Cu and Pb in the wet sediment was transformed with drying and heating treatments to the labile ones like adsorbed and reducible fraction, but Zn to carbonate and reducible fraction. Heating of the sediment at $320^{circ}C$ greatly increased the labile fraction of Cd and Cu, while that at $105^{circ}C$ for Pb and Zn. It is believed that the increase in labile forms of heavy metals in the sediments by drying and heating is caused by the contact with oxygen during drying and heating and by the increase of pH of the pore water at the expense of organic/sulfidic fraction. It is concluded that the drying and oxidation currently used in the treatment of dredged sediment can increase labile forms of heavy metals in the sediment, and the potential of the metal availability from the sediment. |
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| 키워드 |
| chemical form;sequential extraction;drying;heating treatment;labile form;metal pollution; |
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한국하천호수학회지 / v.38, no.4, 2005년, pp.334-334
한국하천호수학회
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200510102441897)
언어 : 한국어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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