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| 배지의 특성에 따른 토양미생물 활성이 Bio-electrokinetics에서 Pb와 Cu의 이동성에 미치는 영향 |
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김홍태, 이태룡 |
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| Effect of Activation of Soil Microbes on Electromigration according to the Characteristics of the Media of Pb and Cu by Bio-electrokinetics |
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Hong Tae Kim, Tae Ryong Lee |
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| Abstract |
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Electrokinetic has been considered a promising technology to remediate soils contaminated with toxic heavy metals. Several modifications have been studied to improve the remediation processes. In this study, bio-electrokinetic(BEK) process which stands for electrokinetic process combinded with activated soil bacteria was proposed and environmentally evaluated for enhancement of Pb and Cu migration rates by using culture media solution instead of the electrolyte solution. Five different types of the solutions for each phases were used at different culture media and electrolyte ratios (v/v) with 1:0, 0:1, 3:1, 1:1 and 1:3 for phase 1, 2, 3, 4 and 5, respectively. In addition, experiments were conducted for the ratios between soil microbes and electrolyte at 90% and 80%. In the experiments using electrolyte of containing ${NO_3}^-$, the concentrations of leed and copper in the soil at section-1 is relatively lower than that of section-6 since heavy metal components moves from the cathode electrode to the anode electrode. Also the migration rate of lead and copper is high at phase 3. In the experiments using electrolyte of containing ${NO_2}^-$, the migration rate of lead and copper is relatively lower than that of using electrolyte of containing ${NO_3}^-$. Overall results demonstrated that the heavy metal removal efficiency using electrolyte of containing ${NO_3}^-$ is higher than that of using electrolyte of containing ${NO_2}^-$. |
| Key Words:
Bio-Electrokinetics; Lead; Copper; migration; culture media; nitrate electrolyte |
| 요지 |
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유해한 중금속으로 오염된 토양을 정화하기 위하여 고려된 유망한 기술은 동전기정화법이다. 정화 과정을 개선하기 위하여 몇가지를 수정하여 연구하게 되었다. 본 연구에서는 중금속으로 오염된 지역의 토양 및 지하수에 동전기적 기술을 사용하고 배양된 금속환원 미생물과 영양분을 주입하여 토양 내의 토착 미생물을 활성화하여 납과 구리의 이동도를 상승시키는 것이 목표이며, 연구 결과 전체적으로 배양액 중 배양된 금속환원 미생물의 부피를 75%로 맞추었을 때 제거효율이 가장 크게 나오는 것을 확인했고, 배양액으로 ${NO_3}^-$를 사용하여 배양된 금속환원 미생물군의 중금속 제거 능력이 다소 뛰어남을 알 수 있었으며, 기존의 동전기법과 비교하여 이동도가 60~70% 상승함을 확인하였다. |
| 핵심용어:
생물 동전기정화법; 납; 구리; 이동도; 배양; 질산염 전해액 |
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