• 방사성폐기물학회지
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• 제6권1호
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• pp.1-9
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• 2008

투수성이 높은 토양에 대한 동전기세정 제염의 영향을 평가했다. 실험토양은 많은 모래를 함유하여 수리전도도가 높은 연구 원자로 주변부지로부터 채취했다. 세정용액의 방출속도는 제염시간 경과와 함께 감소했다. 시트릭산을 사용했을 때, 세정용액의 방출속도는 78.7 ml/day로 가장 빨랐다. 세정용액으로 초산을 사용하였을 때, 토양으로부터 코발트와 세슘의 제거효율은 가장 높은 값인 95.2%와 84.2%를 나타냈다. 동전기제염 시 발생된 토양 폐액부피는 토양세척제염시보다 1/20으로 감소했다. 반면에 동전기세정방법은 토양으로부터 코발트와 세슘 제거효율을 동전기방법 보다 각각 6%와 2%로 향상시켰다. 그러므로 동전기세정방법은 투수성이 높은 토양제염 시 좀 더 효과적이다.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2003년도 추계학술발표회
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• pp.302-305
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• 2003

The electrokinetic remediation tests for natural soil contaminated by lead are performed on unsaturated conditions, in which the degree of saturation is controlled through the changes in water content and the constant unit weight. At the degree of saturation of 70% the small acid range and electrical potential is developed. The changes in the water content are little above the saturation of 90%. But it is increased by 1.7 times at the degree of saturation of 70%. Finally, the efficiency of extraction is improved at 70% than 100%.

• 한국지하수토양환경학회지:지하수토양환경
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• 제15권5호
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• pp.1-7
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• 2010

Electrokinetic technology was applied to remediate Cu, Pb and As-contaminated paddy soil. Removal of metal is highly dependent on the processing fluid during electrokinetic treatment. Tap water, NaOH, $HNO_3$, $Na_2EDTA$, and citric acid were evaluated as the processing fluids to enhance metal removal. Cu and Pb were transported toward cathode, however, it did not removed from soil section, while 56.6% of As was removed at a acidic condition. The strong acidic condition with nitric acid as a processing fluid enhanced the desoprtion of As from soil surface. However, longer operation time is needed to get the higher removal of Cu and Pb, and the acidification of soil after electrokinetic treatment should be solved.

• Nuclear Engineering and Technology
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• 제34권1호
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• pp.1-8
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• 2002

After kaolin clay was artificially contaminated with Co$^{2+}$ ion, the remediation characteristics were analyzed by the electrokinetic method. Ethanoic buffer was injected in the soil column and $CH_3$COOH was continuously inputted to the cathode reservoir to restrain the pH increase. Since the pH of the cathode side of the soil column was 4.0 initially and increased to only 6.5 after remediation for 43.6 hours, precipitate, Co(OH)$_2$, was not formed in the column. The effluent rate increased with the passage of time and Co$^{2+}$ removal in the column at the initial time were mainly controlled by ion migration. 13.1% of the total amount of Co$^{2+}$ in the soil column was removed in 10 hours, 46.8% of the total Co$^{2+}$ in 20.8 hours, 71.7% of the total Co$^{2+}$ in 30.1 hours, and 94.6% of the total Co$^{2+}$ in 43.6 hours. Meanwhile, residual concentrations in the column calculated by the developed model were similar to those by experiment. experiment.

• 한국지하수토양환경학회지:지하수토양환경
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• 제13권6호
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• pp.17-22
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• 2008

산순환 동전기적 정화기술의 아연과 니켈로 오염된 토양의 정화 타당성을 조사하였다. 1M HCl을 활용한 토양세척에서 아연과 니켈의 제거율은 각각 24%와 9%였으며, 산세척은 이 토양을 정화하기에 적합하지 않았다. 일반적인 동전기 정화 방법으로 28일 동안 운전한 결과, 아연과 니켈의 제거율은 산세척보다도 낮았다. 강산으로 음극을 순환시켜주어 토양 전체의 pH를 산성으로 조절한 실험에서 아연과 니켈의 제거는 비약적으로 증가하였다. 또한 강산으로 전처리한 토양에서는 그 제거율이 보다 많이 증가하였다. 이러한 실험결과를 근거로 볼 때 산순환 동전기 정화는 아연과 니켈로 오염된 토양을 정화하는데 매우 효과적인 것으로 판단된다.

• 한국지하수토양환경학회지:지하수토양환경
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• 제8권1호
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• pp.1-8
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• 2003

본 연구에서는 동전기적 토양복원에 적합한 계면활성제를 선정하는 방법으로 세 가지 계면활성제, APG, Brij30, SDS를 대상으로 토양에 흡착되는 계면활성제의 양, phenanthrene에 대한 용해도, 생분해도 및 동전기적 토양정화 현상을 살펴보았다. Phenanthrene은 kaolinite에 최대 2,200 mg/kg dry soil까지 흡착되었으며, APG, Brij30, SDS는 토양 1kg당 각각 40, 7, 4g이 흡착되었다. Phenanthrene의 용출효율은 계면활성제에 대해서 Brij30＆gt;SDS＆gt;APG의 순서로 나타났으며, 생분해도는 APG＆gt;Brij30＆gt;SDS순서로 나타났다. 동전기 정화실험에서는, 세 가지 계면활성제 중에서 전기삼투 흐름이 가장 원활한 APG가 phenanthrene에 대해 높은 제거율을 나타냈다. 이로부터 동전기적 토양복원에 적용하기 위해서는 계면활성제의 유기오염물에 대한 용출효율보다는, 전기삼투 흐름을 원활하게 할 수 있는 계면활성제를 선택하는 것이 보다 중요한 요소임을 알 수 있었다.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2001년도 추계학술발표회
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• pp.191-194
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• 2001

The electrokinetic apparatus for remediation of the soil contaminated with Cs$^{+}$was designed. After kaolin clay was compulsorily contaminated by Cs$^{+}$ solution, the remediation characteristics by electrokinetic method were analyzed. After remediation experiment, the pH of the cathode side of the soil column was increased to 12.7 due to the generation of OH in cathode reservoir, but no hydroxide cesium form in the cathode side. Effluent rate from the cathode almost was constant and cesium concentration of effluent decreased with time passage. The 49% of a total of Cs$^{+}$ in the column was decontaminated for 0.4 day, the 72% of a total of Cs$^{+}$ in the column was decontaminated for 0.8 day, the 83% of a total of Cs$^{+}$ in the column was decontaminated for 1.2 days, the 89% of a total of Cs$^{+}$ in the column was decontaminated for 1.6 days, and the 93% of a total of Cs$^{+}$ in the column was decontaminated for 2.1 day Meanwhile, the predicted values of residual concentration by the developed model were quite similar to those obtained from experiments.m experiments.

• 대한자원환경지질학회:학술대회논문집
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• 대한자원환경지질학회 2007년도 춘계 지질과학기술 공동학술대회
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• pp.37-39
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• 2007

See Full Text

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2004년도 임시총회 및 추계학술발표회
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• pp.72-75
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• 2004

The potential of electrokinetic (EK) technology has been successfully demonstrated for the remediation of heavy metal contaminated fine-grained soils through laboratory scale and field application studies. Arsenic contamination in soil is a serious problem affecting both site use and groundwater quality. The EK technology was evaluated for the removal of arsenic from two soil samples: kaolinite clay artificially contaminated with arsenic and arsenic-bearing tailing soil taken from the Myungbong (MB) mining area. The effect of cathodic electrolyte on the process was investigated using three different types of electrolyte: deionized water (DIW), potassium phosphate (KH$_2$PO$_4$) and sodium hydroxide (NaOH). The result of experiments on the kaolinite clay shows that the potassium phosphate was most effective in extracting arsenic, probably resulting from anion exchange of arsenic species by phosphate. On the contrary, the sodium hydroxide seemed to be most efficient in removing arsenic from the tailing soil, and it is explained by the fact that sodium hydroxide increased the soil pH and accelerated ionic migration of arsenic species through increase in desorption and dissolution of arsenic species into pore water.

• 한국지하수토양환경학회지:지하수토양환경
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• 제12권3호
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• pp.23-28
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• 2007

동전기적 처리에 의한 무기 오염 물질의 이동 및 제거율을 조사하기 위해 일련의 흡착/탈착 실험 및 동전기 정화 실험을 실시하였다. 동전기적 효과로 인해 발생된 양극 부근에서의 탈착 현상 및 음극 부근에서의 침전 현상을 중금속으로 오염된 점토 시료의 흡착 및 탈착 특성과 비교하여 분석하였다. 제거 효율은 300 V/m의 전압구배로 약 4시간의 동전기적 처리 결과 80% 정도의 높은 제거 효율을 확인할 수 있었다.