• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 1998.11a
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• pp.19-26
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• 1998

토양과 지하수 오염은 오염원이나 그 정화 방법에 있어서 서로 밀접한 관계를 가지고 있으며, 수질오염이나 대기오염과 달리 일단 한번 오염이 되면 오염 정화과정이 매우 복잡하고 어려우면서도 비용이 많이 드는 특성을 갖고 있기 때문에 오염원의 형태에 따른 통합된 관리 및 효율적 정화기술의 적용이 무엇보다 필요하다. 따라서 표준화된 오염조사 절차 (Environmental Site Assessment)를 통해 대상부지를 조사한 후, 확인된 오염원의 정화를 위한 기술을 선정함에 있어 필요한, 오염원·대상부지 특성 및 사업환경에 따른 정화기술에 대해 설명하고, 토양 및 지하수 통합 정화기술의 적용 예를 들어 토양과 지하수를 통합·관리함이 필요함을 살펴보고자 한다.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 1999.10a
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• pp.99-102
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• 1999

본 연구에서는 대표적인 물리 화학적 토양정화방법인 토양세척기법의 효율증진을 위하여, Fe를 다량 함유한 고농도 윤활유 오염토양을 대상으로 알카리 용액과 산성용액의 세척효율을 비교 검토하고, 과산화수소의 첨가에 따른 세척효율의 향상효과를 알아보았다. 세척용제인 NaOH와 HCl를 이용하여 세척효율 검토 결과 NaOH를 이용한 경우에 약 60% 의 세척효율을 나타냈다. 또한 NaOH 농도에 따른 정화 효율은 각각 0.5% > 1% $\geq$ 2% 순서로 증가하였다. 기존의 세척효율을 향상시키기 위하여 과산화수소를 첨가하고 오염토양의 정화효율을 비교 검토한 결과 NaOH용액에서는 과산화수소의 농도가 증가할수록 정화효율이 증가하였으나 NaOH의 농도증가에 대해서는 큰 영향을 보이지 않았으며, NaOH 3%의 농도에서 과산화수소 1%를 첨가했을 때 85%의 정화효율을 나타냈다. 또한 과산화수소 주입시기에 따른 영향을 검토한 결과 세척 후 과산화수소를 주입한 경우에 정화효율이 높았다. 반면에 HCl의 경우는 HCl의 농도가 증가할수록 정화효율이 증가하였고, 세척하지 않고 과산화수소를 주입한 경우에 정화효율이 증가하였다. 고농도의 윤활유 오염토양의 세척효율을 증진시키기 위한 처리로서 과산화수소의 주입은 NaOH 상태에서 그 효율이 약 15%정도 증진되었으며, 일정시간에 이르면 정화효율이 평형에 도달하는 것을 알 수 있었다. HCl 상태에서는 25%의 정화효율이 증진되는 것을 알 수 있었다.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 1996.11a
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• pp.88-91
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• 1996

본 연구에서는 전기화학적 정화방법인 electrokinetic 정화기술을 이용하여 오염된 토양내에서 중금속을 제거하는 방안을 연구하였다. 이를 위하여 납을 혼합하여 오염시킨 점토시료에 대하여 정화가동시간, 공급전류, 오염농도를 다르게 하고 3가지의 향상기법을 적용시켜 정화실험을 실시하였다. 실험결과를 토대로 유입수 및 유출수의 PH, 오염토의 PH, 전기포텐셜, 유출수량, 전기 전도도 등 오염토의 물리화학적 성질변화를 구명하고 정화가동조건 및 향상기법적용에 따른 오염토내의 납 제거효과를 파악하였다. 본 연구를 통하여 electrokinetic 정화기술은 투수성이 낫은 점성토 토양내의 중금속을 제거하는데 매우 효과적인 것으로 판명되었다.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 1997.05a
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• pp.101-104
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• 1997

본 연구에서는 네덜란드에서 시행하고 있는 토양환경정책을 정리하고, 국내의 적용성에 대해서 검토해 보았다. 네덜란드의 토양환경관리의 목표점은 토양의 다기능성을 유지시키고자 한 것으로서 다기능성의 회복에 토양정화의 주목적이 있다. 네덜란드의 토양법체계는 토양보호법을 기점으로 주변에 환경관리법, 건축법등을 통해 토양환경의 보전을 하고 있으며, 공장지대나 주유소는 토양보호법의 테두리안에서 별도의 명령을 통해 관리되고 있다. 아울러 정화의 책임을 명확히 하였으며, 정화의 책임순서로는 오염원인자, 소유자, 권리행사자 순으로 되어 있으며. 정화는 오염자 스스로 정화를 하도록 유도하고 그렇지 않을 경우에는 정부가 돈을 투자하여 정화를 행하고 있다. 아울러 건축물을 짓고자 할 경우에는 토양에 관한 조사를 하도록 하고 있으며, 토지를 사고 파는 과정에서는 반드시 토양의 질에 관한 정보를 확인하도록 행하고 있다.

• Journal of Soil and Groundwater Environment
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• v.13 no.3
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• pp.59-66
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• 2008

A biological study was conducted to evaluate the enhancement of landfarming of soil contaminated with petroleum hydrocarbon (TPH) applying organic composite nutrients and a chemical oxidation during bioremediation. The target value of soil TPH after treatment was 500 mg/kg TPH. Addition of an organic compost and liquid swine manure for the removal of soil THP showed higher efficiency as 84.4% and 92.2% respectively than inorganic nutrients of 80.2%. In addition to the removal of non-biodegradable portion of residual hydrocarbons in soil, a chemical oxidation was applied during tailing period of the biological remediation, which showed high remediation efficiency as 98.1% compared with single bioremediation efficiency of 84.7%.

• Economic and Environmental Geology
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• v.53 no.4
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• pp.441-477
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• 2020

There have been raised other environmental issues related to remediated soils piled up in numerous carry-out processing facilities because a considerable quantity of them have been produced every year, but most of them have not been relevantly reused or recycled. Thus, this article reports the trend of researches on the development of techniques to restore the quality of remediated soils to activate their reuse and recycling. Firstly, the tendency of change in soil properties through remediation processes was looked over, and then the degradation of soil quality was characterized according to the type of remediation processes. Besides, the direction of policy to promote the reuse and recycling of remediated soils was introduced, and finally, the future works needed were suggested. This article was prepared based on the results of the survey of domestic and foreign literature. A number of literature were reviewed to scrutinize the change of soil properties due to remediation processes and diverse techniques for the amendment and restoration of remediated soils. Furthermore, the policies related to the reuse and recycling of remediated soils were arranged with the reference of the first and second versions of the Soil Conservation Master Plan of Korea. The literature survey focused on three kinds of remediation technologies, such as land farming, soil washing, and thermal desorption, which were most frequently used so far in Korea. The results indicate that the tendency of change in soil properties was significantly different depending on the type of remediation processes applied, and the degradation characteristics of soil quality were also totally different between them. The soil amendment and restoration can be categorized as three techniques depending on the type of substances used, such as inorganic, organic, and biological ones. Diverse individual materials have been used, and the soil properties improved or enhanced were dependent on the type of specific materials utilized. However, few studies on the restoration of soil qualities degraded during the remediation processes have not been carried out so far. The second Soil Conservation Master Plan states the quality certification and target management system of remediated soils, and it is expected that their reuse and recycling will be facilitated hereafter. With the consideration of the type of remediation processes implemented and public utility, the restoration technologies of remediated soils should be developed for the vitalization of their reuse and recycling. Besides, practical and specific measures should be taken to support the policy specified in the second Soil Conservation Master Plan and to promote reuse/recycling of remediated soils.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 1997.05a
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• pp.116-119
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• 1997

광산지 및 쓰레기매립지의 오염토양을 정화하는데 식물의 이용가능성을 평가하기 위하여 강원도, 경상북도 지역에 분포하는 17곳의 폐광산과 강원도에 분포하는 농촌형 일반 쓰레기매립지 6곳을 대상으로 광산지와 매립지의 토양 특성을 조사하고, 서식 식물종의 오염 물질 제거 능력과 개척종으로서의 가능성을 평가하였다. 광산지 토양의 경우 산성화가 진행된 곳이 많았고, 중금속함유량도 전국 토양의 평균함유량보다 훨씬 높게 나타났으나, 매립지의 경우 약알카리성 토양이 많았고, 광산지와 달리 중금속 오염의 우려는 없었다. 오염토양에 서식하는 쑥을 포함한 14종의 식물체중에서 오염토양정화기술에 이용 가능한 유용식물로 Aremisia princeps(쑥), Micanthus sinensis(억새), Oenanthera odorata(달맞이 꽃)등이 중금속의 흡수력과 지상부로의 이행력이 큰 식물종으로 나타나 phytoremediation에 있어서 개척종으로 이용가능할 것으로 판단되었다.

• Journal of Environmental Impact Assessment
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• v.32 no.2
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• pp.112-122
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• 2023

To restore the ecological function of contaminated soil and maximize the ecological services provided by the soil, besides the toxicity orrisk caused by pollutants, the functional aspects of the soil ecosystem should be considered. In this study, a method for evaluating the health of cleaned soil was presented, and the applicability of the proposed evaluation method was examined by applying it to soil treated with washing and landfarming. Productivity, habitat, water retention capacity, nutrient cycling, carbon retention capacity, and buffering capacity were used as soil health evaluation indicators. The results showed that the soil health was not completely recovered after remediation, and even in the case of the washed soil, the health was lower than before remediation. On the other hand, there was no significant change in soil quality due to oil pollution, but soil health deteriorated. Unlike the slightly improved soil quality after landfarming treatment, soil health was not completely restored. Therefore, the results of this study indicate that it is desirable to consider both soil quality and health when evaluating the remediation effect. The soil health evaluation method proposed in this study can be usefully utilized for the sustainable use of cleaned soil and to promote ecosystem services.

• Journal of Soil and Groundwater Environment
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• v.13 no.6
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• pp.17-22
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• 2008

The feasibility of acid-enhanced electrokinetic remediation on zinc and nickel-contaminated soil was investigated in the laboratory. Simple extraction efficiency using 1M HCl was 24% for Zn and 9% for Ni, as a result, the acid washing is not effective to remove Zn and Ni from the soil. The effiencey of normal electrokinetic treatment during 28 days was less than simple soil washing. Catholyte circulation with a strong acid enhanced dramatically the removal of Zn and Ni and pretreatment of soil with acid increased more the removal. Based on the result, acid-enhanced electrokinetic remediation is effective to remove Zn and Ni from the contaminated soil.

• Journal of the Korean GEO-environmental Society
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• v.13 no.3
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• pp.59-70
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• 2012

In this study, to select the best stabilizer for the heavy metals-contaminated soil from a smelter area during phytoremediation, a plant uptake experiment and a soil stabilization were simultaneously applied using Pteris multifida Poir. and five pre-screened stabilizers(zeolite, Mn dioxide, slag, Ca oxide, and magnetite). The extracted heavy metal was measured and compared using a 3 step sequential extraction for the soil samples. The growth rate of the plant was also evaluated. The stabilizers stabilized heavy metals in soil and reduced the extraction rate. Magnetite and calcium oxide showed better results than other stabilizers. The stabilizers enhanced the growth of the plant. All the heavy metals except for arsenic were concentrated in roots while arsenic was concentrated in leaves of the plant. It is concluded that the stabilizers can minimize the heavy metal release from the contaminated soil during phytoremediation and stimulated the growth of plant. These effects of stabilizers could compensate for some weak points of phytoremediation such as reaching of heavy metals by rainwater.