• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2004년도 임시총회 및 추계학술발표회
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• pp.195-198
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• 2004

This study applied EK method to remediate contaminated soil by heavy metal(Pb), tried to increase the efficiency of remediation using zeolite as enhanced EK remediation method to overcome the limit of traditional EK remediation method. Adsorption tests on Pb were conducted to apply the EK extraction and test conditions which contained the electrode reversal, operating time were established. After tests, lead-ions were transported into the specific position of zeolite by EK phenomena, then the immobilization of lead-ions at zeolite was developed. Based on these tests, the efficiency of remediation is different with its test conditions. In addition, the efficiency of remediation was improved dramatically by adding zeolite without electrode reversal and satisfied TCLP regulation of EPA in USA through the whole sample range. Finally, absorption and immobilization capacity of zeolite were proved its excellence and confirmed the possibility of application as enhanced EK remediation method.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 1998년도 공동 심포지엄 및 추계학술발표회
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• pp.41-47
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• 1998

The solvent flushing apparatus for soil remediation was manufactured. After the soil around nuclear facilities was sampled and was compulsorily contaminated by Co, the remediation characteristics by solvent flushing were analyzed. Meanwhile, one-dimensional solute transport within nonequilibrium sorption code was developed for modelling of the soil remediation, input parameters for modelling were measured by laboratory experiment. Experimental results are as follows : When water was used as a solvent, the higher was the hydraulic conductivity, the higher the efficiency of soil remediation was. When EDTA solution was used as a solvent, the soil remediation efficiency of EDTA solution showed higher than that of water.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2002년도 총회 및 춘계학술발표회
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• pp.34-37
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• 2002

In this study, electrochemical characteristics variation and removal efficiency with initial pH and mineral compositions during electrokinetic remediation of lead contaminated soils were investigated. Test results showed that heavy metal transportation affected by soil characteristics and electrochemical characteristics varied during electrokinetic remediation. Therefore, in the application of enhanced electrokinetic remediation technique to increase removal efficiency, discrete selection of enhanced technique with characteristics of targeted soil were needed.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2001년도 추계학술발표회
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• pp.151-154
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• 2001

To assess the remediation possibility of groundwater contaminated with MTBE, micellar solubilization by various surfactants was evaluated. Micellar solubilization is basic phenomena to apply micellar enhanced ultrafiltration for groundwater remediation contaminated with MTBE. Sodium dodecyl sulfate (SDS) shows the best removal efficiency among various nonionic, cationic and anionic surfactants. Molar ratio of SDS to MTBE was the most important factor for removal of MTBE using micellar solubilization. With the ratio of more than 13, the removal efficiency was saturated to 55%.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2004년도 임시총회 및 추계학술발표회
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• pp.199-202
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• 2004

In this study the field-scale tests were performed in which in-situ E/K remediation technologies were applied, and then the results were present. For traditional E/K remediation method the efficiency of remediation is not large, but the enhanced method with citric acid significantly increases the removal efficiency. Also EDTA, reported as a good enhancement agent for removal of heavy metals, is similar to that of citric acid. Therefore citric acid is preferred rather than EDTA in view of the cost on the contaminant removal per unit concentration.

• 방사성폐기물학회지
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• 제7권3호
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• pp.153-160
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• 2009

방사성 토양을 복원하기 위해 원자력시설 주변 부지의 수리지질 특성을 분석하여 국내 방사성 토양 복원에 적합한 수직형 동전기세정장치를 개발하였다. 또한, 이 수직형 동전기세정장치를 이용한 실험을 통해 원자력시설 주변 방사성토양을 복원하기 위한 최적 세정제를 선정하고 단기간에 높은 제거효율을 확보할 수 있는 최적제염조건들을 도출하였다. 초산을 세정제로 사용하였을 때 토양으로부터 코발트와 세슘의 제거효율이 가장 높으므로 동전기제염을 위한 최적 세정제로 초산을 선정하였다 동전기세정제염 시 세정제 주입량을 증가 시켰을 때 토양으로부터 코발트와 세슘의 제거효율은 평균 약 4.6% 제거효율이 증가했고 토양폐액 발생량도 동전기제염의 1.5배 인 2.4mL/g이었다. 동전기토양셀의 전압구배를 2배로 증가시켜 4 V/cm를 적용시켰을 때, 코발트와 세슘의 제거효율은 각각 98.9%와 96.7%로 평균 약 4.3% 제거효율이 증가했다. 그리고 세정제 농도를 0.01M로부터 0.05M로 증가시킨 후 제염실험 결과 코발트의 제거효율은 상승했지만 세슘의 제거효율은 감소하였다. 위 실험결과 개발한 수직형 동전기세정장치의 최적제염조건으로 제염시간은 20일 동안 초산 $0.01M{\sim}0.05M$을 세정제로 사용하여 동전기토양셀의 전압구배는 4 V/cm를 가하고, 2.4mL/g의 세정제를 주입하는 것이다.

• 한국지반신소재학회논문집
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• 제10권1호
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• pp.29-36
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• 2011

오염지반 복원을 목적으로 사용한 연직배수시스템의 적용성 평가를 위하여 영향 인자에 대한 지반공학적 특성을 기초로한 파일럿 규모의 실내 오염복원 실험시 오염물질의 복원 효율을 분석하였다. 또한, 도출된 결과를 바탕으로 유한요소 및 유한차분방법에 의한 수치해석을 수행하였으며, 해석시 적용된 물성값에 대한 매개변수를 평가하였다. 오염복원 모형실험과 수치해석에서 최소한계농도비를 기준으로 하여 오염복원율 해석 결과, 지반이 조밀한 경우 최소한계 농도비 도달시간이 더 길어지며, 지속시간에 따른 농도분포를 살펴보았을 때, 농도는 주입배수재를 중심으로 그 주변에서 더 빠르게 제거되고, 반면에 추출배수재 주변에서는 농도가 더 높게 나타남을 알 수 있었다.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2001년도 총회 및 춘계학술발표회
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• pp.226-229
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• 2001

For volume reduction of the wastewater generated on washing the soil contaminated with cobalt, recycling and reuse experiments of the wastewater were executed. Also. the soil remediation efficiency by repetitive washing with fresh citric acid was analyzed. The soil around TRIGA was sampled for the experiment. Results of recycling experiment by replacement-precipitation method were as follows. The remediation efficiency of 1st recycling wastewater was 97% and that of 2nd recycling wastewater was 94%. Also, To obtain remediation efficiency over than 90%, the 5th repetitive washing with fresh citric acid was needed.

• International journal of advanced smart convergence
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• 제9권1호
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• pp.19-28
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• 2020

We studied the on-site treatment of soil contaminated by heavy metals and petroleum was tested using relocatable soil washing equipment for greater remediation efficiency. Different combinations of pH and solid/liquid ratio were tested to determine the optimum balance, settling on values of 5 and 1:2, respectively. Next, soils containing Pb, Hg, and petroleum were further tested to assess the optimum number of washing cycles. The remediation efficiency of Pb and Hg in soil contaminated solely by heavy metals was 90.1% and 86.4% after three and two washings, respectively. The remediation efficiency of petroleum in soil contaminated solely by petroleum was 98.8% after one washing. When soil contaminated by both heavy metals and petroleum was cleaned, up to 91.0% of Pb, 86.9% of Hg, and 96.1% of petroleum was removed after two, one, and one washings, respectively. We conducted all remediation efficiencies and concentration reductions satisfied the standard threshold for soil contamination in South Korea.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2000년도 추계학술대회
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• pp.140-144
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• 2000

In treatment of contaminated ground by electrokinetic remediation, pH control is the main prolllem for enhancinfi remediation efficiency. In this study, analysed pH variation characteristics according to contaminant(Pb$^{2+}$) concentration and estimated remediation efficiency with organic acid to prevent precipitation in cathode due to hydroxide ion occurrence. Because most of transported Pb$^{2+}$ is precipitatecl according as pH is increased at specimen adjacent to cathode reservoir, little magnitude of Pb$^{2+}$ is flowed out of specimen.cimen.