• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2003년도 International Symposium
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• pp.28-57
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• 2003

Germany as a densely populated and heavily industrialised country has a long and broad experience in handling contaminated sites. With this presentation we want to describe some main aspects of the soil protection policies and the remediation of contaminated sites in Germany. Due to the history of working on contaminated sites in Germany the Federal Soil Protection Act came into force in 1998. A lot of programmes and network in Germany and in Europe, funded by the State or the European Union, helped developing new measures and techniques for remediation and also for implementing regulations for the involved authorities. Questions like 'who is responsible？' and 'who has to pay for measurements and the remediation？' became more and more important. In the near future there will be an official European Soil Protection Policy (is expected in June 2004). Besides the contaminated sites also other soil protection policies as 'Reducing the land consumption' are pursued and an indicator is developed.and an indicator is developed.

• Nuclear Engineering and Technology
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• 제54권6호
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• pp.2244-2252
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• 2022

Based on GIS technologies, a decision support system (GIDSS) has been developed to remediate agricultural lands in the Bryansk region (Russia) contaminated by ¹³⁷Cs after the accident at the Chernobyl nuclear power plant. GIDSS is a multilevel system consisting of basic, information and computational layers. GIDSS allows justifying a targeted approach for the remediation of agricultural lands belonging to agricultural enterprises for the production that meets the established radiological requirements for the content of radionuclides. Evaluation of the effectiveness of alternative remediation technologies and the selection of optimal measures were carried out at the level of elementary plots using radiological criteria. The introduction of GIDSS will enable agricultural producers in the south-western districts of the Bryansk region to conduct radiation-safe agro-industrial production in radioactively contaminated areas, which will help improve the socio-economic situation of the region and return it to normal living conditions.

• 한국지하수토양환경학회지:지하수토양환경
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• 제16권5호
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• pp.24-30
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• 2011

Tidal flats which are ecologically sensitive, are hard to remediate once they are contaminated by oil spill accidents. Traditional oil remediation measures focus on removal efficiency, and their improper implementation can adversely affect crude oil contaminated coastal areas and greatly disrupt the structure and functions of crude oil contaminated tidal flats. In this study, the oil degradation due to the implementation of remediation measures naturally enhanced using air and natural oil sorbents was evaluated in the lower strata of tidal flats. The effects of air and natural oil sorbents on oil degradation for two concentration levels (< 500 ppm and > 500 ppm) were tested at artificially contaminated tidal flats. Fifty days after these treatments, the natural oil sorbent treatment showed the lowest total petroleum hydrocarbon (TPH) concentration ($4.46{\pm}1.47%$) at the low concentration level, whereas both air and natural oil sorbent treatments showed high degradation efficiencies at the high concentration level ($29.30{\pm}4.39%$). Although the phosphatase activity decreased for all treatments, there was no significant difference between the decreases for the different treatments; on the other hand, B-glucosidase activities were high for both air and natural oil sorbent treatments. Although degradation efficiencies decreased as the concentration increased, the air provision and natural oil sorbent treatment could be an effective ecological restoration measure for oil contaminated tidal flats while minimizing the environmental impact of the remediation efforts.

• Journal of Ecology and Environment
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• 제36권1호
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• pp.89-94
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• 2013

Diatoms have become an integral part of the UK's freshwater monitoring strategy over the past two decades, mostly in response to increasingly stringent European Union (EU) legislation. The use of diatoms is based on strong correlations between diatom assemblages and environmental variables, and from knowledge of the "expected" (= "reference") state of each river. The nationwide overview of the ecological health of rivers this gives allows those stretches of rivers which fail to meet EU criteria to be identified. This, in turn, allows appropriate remediation measures to be planned. Because diatom assemblages vary in space and time, even within a single water body, effective use of diatoms requires a consistent approach in order to minimise uncertainty. This includes the use of methods which comply with European Standards, a training and accreditation scheme for analysts, and a suite of quality assurance methods. Those aspects of uncertainty that cannot be readily controlled have been quantified and all estimates of ecological status are accompanied by the appropriate "confidence of class" and "risk of misclassification". This, in turn, helps planners prioritise those locations which are most likely to benefit from remediation.

• Geomechanics and Engineering
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• 제38권5호
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• pp.455-466
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• 2024

Ground collapse may occur around the tunnel when the cavity caused by groundwater runoff cannot resist the surcharge load. Any cavities or subsidence must be managed to avoid dangerous situations by stabilizing the ground through appropriate remedial measures. Trench and trenchless grouting methods can generally be used for the cavity restoration. The trench method is difficult to properly control the injection range and may cause environmental problems due to grout leakage and damages to the adjacent structures due to grouting pressure. In this study, Membrane-grouting method (MGM) is proposed, which, can be an appropriate trenchless grouting method that fills the void tightly and effectively controls the injection range. This method can be an alternative to eliminating the influence of adjacent structures and environmental pollution by inserting a membrane into the cavity and filling the membrane with grout. The membrane blocks the outflow of grout. In addition, it is easy to control the injection pressure to avoid heaving failure. This paper investigates the principle and application of the MGM using a theoretical method, model test and numerical analysis.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1993년도 지반.환경 매립에 관한 학술발표회 논문집
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• pp.28-44
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• 1993

Remediation actions in uncontrolled landfill site should be conducted after the investigation of contamination status and potential health risk or damage. Based on the above, proper control measures should be established and operated. Also continuous monitoring should be followed. In this study, the status of ground water contamination around Nanji Landfill Site was investigated. Monitoring wells were installed around the landfill and ground water was sampled once a month and analyzed. Water quality of each monitoring well was different depending on the horizontal and vertical distance from the landfill, and the seasonal leachate characteristics were not significantly changed because percolating water stayed long time in the deep waste layer. It was predicted that major multivalent cations were mainly precipitated as metal carbonate form, and chemical mass balances (CMBs) could be applied for the apportionment of leachate contamination to ground water quality of surrounding areas of Nanji Landfill. Parameters required to estimate pollutant flux to the receptor near landfill were listed and discussion to get these parameters was made. Finally, based on the above data, control measures of ground water contamination were suggested and discussed.

• 한국토양비료학회지
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• 제46권2호
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• pp.73-80
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• 2013

Due to the fact that possible risk associated with soil-crop-food chain transfer, metal contamination in croplands has become a major topic of wide concern. Accumulation of toxic metals in edible parts of crops grown in contaminated soils has been reported from number of crops including rice, soybean, wheat, maize, and vegetables. Therefore, in order to ensure food safety, measures are needed to be taken in mitigating metal pollution and subsequent uptake by crop plants. Present paper critically reviewed some of the cost effective remediation techniques used in minimizing metal uptake by crops grown in contaminated soils. Liming with different materials such as limestone ($CaCO_3$), burnt lime (CaO), slaked lime [$Ca(OH)_2$], dolomite [$CaMg(CO_3)_2$], and slag ($CaSiO_3$) has been widely used because they could elevate soil pH rendering metals less-bioavailable for plant uptake. Zn fertilization, use of organic amendments, crop rotation and water management are among the other techniques successfully employed in reducing metal uptake by crop plants. However, irrespectively the mitigating measure used, heterogeneous accumulation of metals in different crop species is often reported. The inconsistency might be attributed to the genetic makeup of the crops for selective uptake, their morphological characteristics, position of edible parts on the plants in respect of their distance from roots, crop management practices, the season and to the soil characteristics. However, a sound conclusion in this regard can only be made when more scientific evidence is available on case-specific researches, in particular from long-term field trials which included risks and benefits analysis also for various remediation practices.

• Journal of Radiation Protection and Research
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• 제33권1호
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• pp.27-34
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• 2008

국내 환경을 고려하여 개발된 도시환경 방사능오염 평가모델 METRO-K (${\underline{M}}odel$ for ${\underline{E}}stimates$ the ${\underline{T}}ransient$ Behavior of ${\underline{R}}adi{\underline{O}}active$ Materials in the ${\underline{K}}orean$ Urban Environment)는 IAEA (${\underline{I}}nternational$ ${\underline{A}}tomic$ ${\underline{E}}nergy$ ${\underline{A}}gency$) 주관 국제공동 연구프로그램 EMRAS (${\underline{E}}nvironmental$ ${\underline{M}}odelling$ for ${\underline{RA}}diation$ ${\underline{S}}afety$)의 도시환경 방사능오염평가 분과에서 체르노빌 원전사고로 오염된 Pripyat 지역과 가상 방사능테러로 인한 오염 시나리오의 평가에 참여해 오고 있다. 본 논문에서는 EMRAS 프로그램의 일환으로 수행된 Pripyat 지역에 대한 METRO-K의 평가 결과를 제시하였고 다른 모델의 예측값과 비교, 논의함으로써 만일의 도시환경 방사능오염시 대응행위 결정지원을 위한 동 모델의 실용성을 고찰하였다. METRO-K를 사용한 평가결과에서 방사성물질의 오염 후 신속한 대응행위는 무엇보다 중요하다는 것을 알 수 있었다. EMRAS 프로그램에 참여한 각기 다른 모델로 평가된 예측값의 차이는 1) 모델의 수학적 구조와 관련 변수값, 2) 모델에 반영된 피폭경로, 3) 피폭영향을 주는 오염표면의 종류, 표면의 넓이 등과 같은 평가에 대한 가정, 4) 각기 다른 문헌으로부터 선택된 대응행위 관련인자의 적용값 등의 차이에 기인하였다. METRO-K을 사용하여 EMRAS 프로그램에서 요구하는 다양한 오염 시나리오에 대해 대부분의 결과를 제출하여 상호 비교되었으며, 이를 통해 METRO-K는 만일의 도시환경 방사능오염으로 인한 대응행위 결정지원에 유용한 도구가 될 수 있음을 확인하였다.

• 자원환경지질
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• 제53권4호
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• pp.441-477
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• 2020

매년 다량 발생되고 있는 정화토가 적절하게 재이용 또는 재활용되지 못하고 반출 처리장에 적치되어 또 다른 환경적 이슈가 되고 있다. 이에 본 논문에서는 이러한 정화토의 재이용 및 재활용을 활성화하기 위하여 필요한 정화토의 토양 질 회복 기술에 대한 연구 및 개발 동향을 조사하였다. 이를 위해 먼저 정화기술별 토양 특성의 변화 양상을 살펴보고, 정화공정에 따른 토양 질의 열화 특성을 파악하였다. 뿐만 아니라 정화토 재이용 및 재활용을 위한 정책적 관련 사항들을 정리하고, 향후 필요한 연구들에 대하여 제안하였다. 본 논문은 국내외 관련 문헌들을 검색하여 작성하였다. 키워드 검색을 통하여 정화기술별 토양 특성의 변화와 토양 개량 및 회복 기술과 연관된 문헌을 조사하였으며, 본문에서는 주로 최근에 발표된 문헌들을 바탕으로 논의하였다. 뿐만 아니라, 제 1, 2차 토양보전기본계획을 참고하여 정화토 재이용 및 재활용과 관련된 정책적 사항들을 정리하였다. 현재까지 국내에서 가장 많이 적용된 토양경작, 토양세척, 열탈착 등을 대상으로 정화공정에 따른 토양의 특성 변화를 정리한 결과, 적용하는 정화기술에 따라서 매우 상이하게 나타나는 것으로 조사되었다. 특히 정화공정을 거치면서 토양 질이 열화되는 양상이 정화기술에 따라서 다르게 나타났다. 토양 개량 및 회복 기술은 크게 무기 개량제, 유기 개량제, 생물학적 개량제 등의 제제를 이용한 방법들로 구분할 수 있으며, 각 개량제에는 다양한 물질들이 활용되고 있고, 각 물질에 따라 개선 또는 향상되는 토양의 특성이 달랐다. 하지만, 각 정화기술별 열화되는 토양 질 회복을 위한 연구들은 현재까지 활발하게 수행되지 않은 것으로 조사되었다. 제 2차 토양보전기본계획에서는 정화토의 품질인증제, 목표관리제 등과 같은 정책적 방안이 명시되어 있음으로써 향후 정화토의 재이용 및 재활용이 촉진될 수 있을 것으로 예상된다. 정화토의 재이용 및 재활용을 위해서는 적용된 정화기술과 미래 용도를 고려한 공공활용성을 담보한 회복 기술들이 개발되어야 할 것으로 판단된다. 이와 더불어 제 2차 토양보전기본계획에서 제시한 정화토의 적극적 활용을 위해서는 이를 뒷받침할 수 있는 구체적이고 세부적인 정책 추진 방안이 마련되어야 할 것이다.

• 지질공학
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• 제25권1호
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• pp.115-129
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• 2015

대단면 터널 입구부의 대절토 사면은 불안정한 응력분포 및 소성변형 가능성으로 인해 잠재적 취약부로 인식되고 있다. 본 사례연구에는 대단면 터널 갱구부 대절토 사면의 강우 후 유실사고 및 원인규명, 복구공법을 분석하여 제시하였다. 대상 현장은 46 mm의 강우 후 암반의 불연속면을 따라 대규모 평면파괴가 발생하였으며, 상부 절토사면의 불안정을 야기하였다. 지질조사 및 매핑 자료 분석 결과, 붕괴 원인은 풍화된 암반의 불연속면에 협재된 충전물과 지반 포화로 인한 절리면 연화(softening)로 판단되었다. 알칼리 장석이 풍부한 화강편마암은 풍화에 취약한 것으로 나타났다. 침하량 계측자료 분석 결과, 붕괴 직전에 급격한 변위량 증가를 관찰하였으며, 향후 사면 계측관리에 활용할 수 있을 것으로 판단된다. 응급복구 대책으로 콘크리트 공동충전 및 외부로부터 압성토 채움을 성공적으로 시행하였다. 항구복구 대책으로 사면부에는 격자블럭 및 지중 앵커 시스템을, 터널 측벽부에는 추가 락볼트 보강 및 그라우팅 공법을 성공적으로 적용하였다. 한계평형해석과 평사투영해석을 통해 원 사면의 불안정성과 보강방법의 유효성을 확인하였다. 본 사례연구는 향후 유사한 대절토 사면에 귀중한 참고자료로 활용될 것으로 기대된다.