• Title, Summary, Keyword: Soil Remediation

Search Result 746, Processing Time 0.056 seconds

Remediation of Soils Contaminated with Co by Solvent Flushing Method (코발트 오염토양에 대한 Solvent Flushing방법에 의한 제염)

  • 김계남;원휘준;김희연;이병직;오원진
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
    • /
    • /
    • pp.41-47
    • /
    • 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.

  • PDF

PERSPECTIVE AND TREND OF CURRENT RESEARCH ON GREEN REMEDIATION IN SOUTH KOREA

  • Park, Jun-Boum
    • Proceedings of the Korean Geotechical Society Conference
    • /
    • /
    • pp.117-124
    • /
    • 2010
  • In the field of soil and groundwater remediation, sustainability was merged into remediation process and green remediation was initiated within the concept of sustainable development. Green remediation was defined and has been already applied to the remediation fields in U.S. In the case of Europe, green remediation has been evaluated for the application of green technology in the remediation industry and they especially defined sustainable remediation following idea of sustainable development. Although green and sustainable remediation is global trends, there are only a few cases about application of green remediation in South Korea. It is needed to develop soil and groundwater remediation technology towards green remediation, considering "Green Growth" as policy direction in South Korea.

  • PDF

Improvement of Landfarming Applicability from Analysis of Case Studies (토양경작법의 사례 분석을 통한 적용방안 개선)

  • Kim, Jong-Won;Choi, Sang-Il;Yang, Jae-Kyu;Kim, Bo-Kyung
    • Journal of Soil and Groundwater Environment
    • /
    • v.15 no.1
    • /
    • pp.19-28
    • /
    • 2010
  • Considering six screen matrix to select an optimum remediation method for the Kunsan military base contaminated with petroleum oil, the following order was obtained: landfarming > biopile > soil washing > thermal desorption = incineration. When the landfarming method was applied for the remediation of 2,250 $m^3$ soil contaminated with petroleum oil ranging from 500 to 2,404 mg/kg as TPH, contamination level decreased below target concentration 450 mg/kg after 20~42 days depending on the initial contamination. From the evaluation of case studies of landfarming, it is suggested that ratty-truss or single-arch structure is suitable in the landfarming plant for the treatment of large-scale contaminated soil requiring long period of remediation. But, vinyl-house structure is suitable in the landfarming plant for the treatment of small-scale contaminated soil requiring short period of remediation. Therefore vinyl-house structure is recommended in the remediation of contaminated soil less than 5,000 $m^3$ requiring within 1 year of remediation period but ratty-truss or single-arch structure is recommended for the remediation of contaminated soil more than 5,000 $m^3$.

토질조건에 따른 납 오염토양의 Electrokinetic 정화 효율

  • 김병일;조용실;한상재;김수삼
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
    • /
    • /
    • pp.34-37
    • /
    • 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.

  • PDF

Remediation of Contaminated Soil with Organic Contaminants using Microemulsion (마이크로이멀젼을 이용한 유기오염물로 오염된 지반의 정화)

  • Park, Ki-Hong;Kwon, Oh-Jung;Park, Jun-Boum
    • Proceedings of the Korean Geotechical Society Conference
    • /
    • /
    • pp.597-604
    • /
    • 2003
  • In the soil washing process, the contaminants are usually removed by abrasion from soil particles using mechanical energy and water However, organic contaminants with low water solubility like polycyclic aromatic hydrocarbons (PAH) are remained on soil particles. Previous studies have shown that surfactant possessing amphipathic activity enhances the solubility of organic materials. For this reason solutions with surfactants have been used to improve removal of organic contaminants on soil washing process. But, in this manner, many problems were found like complete loss of surfactants and additional contamination by surfactant. The remediation method using microemulsion has been introduced to overcome these disadvantages. In this case, surfactants are recycled by phase separation of microemulsion after remediation. In microemulsion process, the surfactant will be recycled by phase separation of the microemulsion into a surfactant-rich aqueous phase and an oil phase after extraction. That is why remediation concept applying microemulsion as washing media has been Introduced. Suitable microemulsion have to be used in order to have the chance of refilling the soil after decontamination and to avoid any risk due to toxicity. The purpose of this research is to evaluate effect of microemulsion to remediation of contaminated soil. We performed test with various organic contaminants like Pyrene and BTEX, also compared efficiency of remediation in microemulsion process with soil washing

  • PDF

Application of Real-Time Monitoring System to In-Situ Soil Remediation Project (원위치 지반오염정화사업에서의 실시간 모니터링 시스템의 적용 사례)

  • Jung, Seung-Yong;Kim, Byung-Il;Han, Sang-Jae;Kim, Soo-Sam;Hong, Sang-Ki
    • Proceedings of the Korean Geotechical Society Conference
    • /
    • /
    • pp.1384-1389
    • /
    • 2005
  • A real-time monitoring system for in-situ soil remediation technologies is developed and then applied to electrokinetic remediation technique in the field trial tests during 150days. The developed system is consisted the controlled program based on internet web page, data logger, measurement instruments and so on. In the measured items there are pH, temperature, electrical current and potential, vacuum pressure. The results indicated that the system is successively applied to electrokinetic remediation technique, and further research considering economic view and multi purpose system for in-situ soil remediation technologies is needed.

  • PDF

계면활성제를 이용한 향상된 EK 정화 시 PAH의 제거

  • 김강호;한상재;김수삼
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
    • /
    • /
    • pp.127-130
    • /
    • 2001
  • This paper presented to phenanthrene removal of electrokinetic(EK) remediation and enhanced EK remediation with bench scale test. The experiments were carried out on mixture soil with phenanthrene as the test compound. The EK remediation experiments were conducted under controlled voltage. Surfactant solution was constantly supplied at the anode reservoir with constant concentration. Results showed that phenanthrene was removed little in EK remediation. Surfactant helped phenanthrene moving and cumulated in cathode region. Moving effect was increased with surfactant concentration.

  • PDF

Analysis of Effecting Parameters on Extraction of Soil Contaminants using Vertical Drains - Focusing on Soil and Contaminants Physical Properties (연직배수재에 의한 토양오염물질 추출에 미치는 영향인자 분석 - 토양 및 오염유체의 물성치를 중심으로)

  • Lee, Haeng-Woo;Chang, Pyoung-Wuck;Kang, Byung-Yoon;Kim, Hyun-Tae
    • Proceedings of the Korean Society of Agricultural Engineers Conference
    • /
    • /
    • pp.355-360
    • /
    • 2005
  • The properties of contaminants, contaminated soil, and the elapsed time are important factors to in-situ soil remediation. Gabr et. al. (1996) derived the solution equation of contaminant concentration ratio as initial one $(C/C_0)$ with time and spatial changes in contaminated area with vertical drains. The contaminant concentration ratio $(C/C_0)$ is analyzed with time and spatial changes as varying the effective diameter, porosity, shape factor, density of contaminated soil and temperature in ground and unit weight, viscosity of contaminants by using FLUSH1 model. Results from numerical analysis indicate that the most important factor to the in-situ soil remediation using vertical drains is the effective diameter of contaminated soil. It also shows that the viscosity of contaminants, porosity of soil, shape of soil, temperature in ground, unit weight of contaminants are, in order, affected to the soil remediation but density of soil is insignificant to the soil remediation.

  • PDF

Effects of Soil Remediation Methods on the Biological Properties of Soils (오염토양 정화공법이 토양의 생물학적 특성에 미치는 영향)

  • Yi, Yongmin;Kim, Gukjin;Sung, Kijune
    • Journal of Soil and Groundwater Environment
    • /
    • v.18 no.3
    • /
    • pp.73-81
    • /
    • 2013
  • Various remediation methods have been applied to clean soils contaminated with pollutants. They remove contaminants from the soils by utilizing physicochemical, biological, and thermal processes and can satisfy soil remediation standards within a limited time; however, they also have an effect on the biological functions of soils by changing soil properties. In this study, changes of the biological properties of soils before and after treatment with three frequently used remediation methods-soil washing, land farming, and thermal desorption-were monitored to investigate the effects of remediation methods on soil biological functions. Total microbial number and soil enzyme activities, germination rate and growth of Brassica juncea, biomass change of Eisenia andrei were examined the effects on soil microorganisms, plant, and soil organisms, respectively. After soil washing, the germination rate of Brassica juncea increased but the above-ground growth and total microbial number decreased. Dehydrogenase activity, germination rate and above-ground growth increased in both land farming and thermal desorption treated soil. Although the growth of Eisenia andrei in thermal desorption treated soil was higher than any other treatment, it was still lower than that in non-contaminated soil. These results show that the remediation processes used to clean contaminated soil also affect soil biological functions. To utilize the cleaned soil for healthy and more value-added purposes, soil improvement and process development are needed.