• 한국환경과학회지
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• 제15권3호
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• pp.279-286
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• 2006

Electrokinetic technique was considered in removing arsenic from the abandoned mining tails. In order to estimate the removal characteristics of arsenic, the sequential extraction analysis and desorption experiment were carried out prior to the application of electrokientic process. The result of sequential extraction analysis indicated that the water soluble and exchangeable fraction, easily leachable to ground water, were very low as much as about 2.5% and the fraction except residual (38.3%), possibly extractable under very acidic or alkalic environment, was about 59%. In the result of desorption test using four different kinds of electrolytes, the mixture of citric acid and sodium dodecyl sulfate (SDS) showed the highest desorption efficiency as much as 77.3%. The removal efficiencies of arsenic from mining tailings by electrokinetic process under the different electrolyte environments were slightly low and resulted in the following order: citric acid + SDS (18.6%) > 0.1 $NHNO_3$ (8.1%) > HAc (7.4%) > Distilled water(6.6%). Also, arsenic in soil matrix was moved favorably in the direction of anodic rather than cathodic region, which is opposite trend with cationic metal ions generally existing in soil, because anionic form of arsenic is dominated in acidic soil caused by the movement of acid front form anode.

• 분석과학
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• 제25권6호
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• pp.429-434
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• 2012

본 연구는 안동호 퇴적물 중의 납 오염 기원을 조사하기 위해 안동호 퇴적물, 안동호 유역의 토양, 광미퇴적물 및 아연제련시설의 부산물 중의 납 동위원소를 분석하고 국내 외 결과와 비교하였다. 안동호 퇴적물 중의 $^{207}Pb/^{206}Pb$ 및 $^{208}Pb/^{206}Pb$는 $0.827{\pm}0.004$ 및 $2.041{\pm}0.015$로서 광미퇴적물의 $0.815{\pm}0.002$ 및 $2.016{\pm}0.006$와 유사한 값을 나타내었으며, 토양 중 $^{207}Pb/^{206}Pb$ 및 $^{208}Pb/^{206}Pb$는 0.756~0.881 및 1.872~2.187로 퇴적물 및 광미퇴적물에 비해 넓은 범위의 납 동위원소 분포를 나타냈다. 아연 광석의 $^{207}Pb/^{206}Pb$ 및 $^{208}Pb/^{206}Pb$는 0.816~0.956(평균 0.832), 2.029~2.219(평균 2.059)로서 비교적 넓은 범위의 동위원소 조성변화를 보였으며, 폐수 및 슬러지 중의 $^{207}Pb/^{206}Pb$ 및 $^{208}Pb/^{206}Pb$는 0.883~0.905(평균 0.887), 2.127~2.156(평균 2.133)로 나타났다. 안동호 퇴적물은 연화광산의 광상과 유사한 납 동위원소 분포특성을 보였으며, 광미퇴적물과 토양에 의한 혼합 특성을, 아연제련시설의 경우, 캐나다 및 호주 등으로부터 수입된 아연 광석에 의한 납 동위원소 분포와 유사한 분포 특성을 나타냈다.