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다성분 반응 이동 모델링을 이용한 트리클로로에틸렌(TCE)으로 오염된 지하수에서의 자연저감 평가
진성욱,전성천,김락현,황현태,Jeen, Sung-Wook,Jun, Seong-Chun,Kim, Rak-Hyeon,Hwang, Hyoun-Tae 한국지하수토양환경학회 2016 지하수토양환경 Vol.21 No.6
To properly manage and remediate groundwater contaminated with chlorinated hydrocarbons such as trichloroethylene (TCE), it is necessary to assess natural attenuation processes of contaminants in the aquifer along with investigation of contamination history and aquifer characterization. This study evaluated natural attenuation processes of TCE at an industrial site in Korea by delineating hydrogeochemical characteristics along the flow path of contaminated groundwater, by calculating reaction rate constants for TCE and its degradation products, and by using geochemical and reactive transport modeling. The monitoring data showed that TCE tended to be transformed to cis-1,2-dichloroethene (cis-1,2-DCE) and further to vinyl chloride (VC) via microbial reductive dechlorination, although the degree was not too significant. According to our modeling results, the temporal and spatial distribution of the TCE plume suggested the dominant role of biodegradation in attenuation processes. This study can provide a useful method for assessing natural attenuation processes in the aquifer contaminated with chlorinated hydrocarbons and can be applied to other sites with similar hydrological, microbiological, and geochemical settings.
이성순(Seong-Sun Lee),전성천(Sung-Chun Jun),하승욱(Seung-Wook Ha),김예지(Ye Ji Kim),이서호(Seo-Ho Lee),이강근(Kang-Kun Lee) 대한지질학회 2021 대한지질학회 학술대회 Vol.2021 No.10
복잡한 부지 특성과 오염물의 정화/저감기술 수준, 비용 문제 등으로 인하여 오염부지 대부분 적절한 관리조치 없이 방치되고 있어 이에 대한 기술개발 및 적용이 시급하다. 특히, 오염확산 억제 및 정화기술이 동시에 적용 가능한 정화공법들에 대해 국내의 복잡한 수리지질학적 및 오염물의 물리·화학적 특성과 특히, 암반파쇄대 지하수 오염에 대해 적합한 정화설계 인자들을 제시하는 것이 중요한 과제로 대두되었다. 따라서, 본 연구는 복합 오염 추적 기법(열 간섭시험 기술, 다중동위원소 분석 기법, 다중 오염원 역추적 확률 모델링 기법, 단열대 선택성 경로 파악을 위한 수리간섭 시험 활용 기술, 복합 물질 추적자 연계 활용 기술)을 통해 고농도 유류 오염부지에 대해 수리적 개념모델을 구축하고, 오염물질 분포 파악을 위한 다중 추적자를 연계한 3차원 현장시험 기술을 개발하고, 이를 통해 암반대 특성에 따른 오염물 분포 및 거동 특성을 평가하는 것이다. 최종적으로 평가된 결과를 토대로 오염확산방지 요소기술을 확보하고, 암반 오염 정화에 적용되는 물리, 화학, 생물학적 정화공법의 현장 맞춤형 활성화 기술 도출에 활용하고자 한다.
이병선,명우호,오세봉,전성천,박길택,송성호,Lee, Byung Sun,Myoung, Wooho,Oh, Sebong,Jun, Seong-Chun,Piao, Jize,Song, Sung-Ho 한국지하수토양환경학회 2020 지하수토양환경 Vol.25 No.1
This study was conducted to examine an artificial recharge system, which was considered to be an alternative for securing additional groundwater resources in a high-density greenhouse region. An injection well with a depth of 14.0 m was placed in an alluvial plain of the zone. Eight monitoring wells were placed in a shape of dual circles around the injection well. Aquifer tests showed that the aquifer was comprised with high-permeable layer with hydraulic conductivities of 1.5×10<sup>-3</sup>~2.4×10<sup>-2</sup> cm/sec and storage coefficients of 0.07~0.10. A step injection test resulted in a specific groundwater-level rising (Sr/Q) values of 0.013~0.018 day/㎡ with 64~92% injection efficiencies. Results of the constant-rate injection test with an optimal injection rate of 100 ㎥/day demonstrated an enormous storage capacity of the alluvial aquifer during ten experimental days. To design an optimal recharge system for an artificial recharge, the high-permeable layer should be isolated by dual packers and suitable pressure should be applied to the injection well in order to store water. An anisotropy ratio of the alluvial aquifer was evaluated to be approximately 1.25 : 1 with an anisotropy angle of 71 degrees, indicating intervals among injection wells are almost the same.
안정동위원소 조성을 이용한 TCE 오염원 규명방법 소개
박영윤,이진용,나원종,김락현,최필성,전성천,Park, Youngyun,Lee, Jin-Yong,Na, Won Jong,Kim, Rak-Hyeon,Choi, Pil Sung,Jun, Seong-Chun 한국지하수토양환경학회 2013 지하수토양환경 Vol.18 No.3
This study was performed to summarize application of ${\delta}^{13}C$, ${\delta}^{37}Cl$ and ${\delta}D$ of trichloroethylene (TCE) to studies on environmental forensic field regarding identification of TCE sources and evaluation of contribution of TCE to groundwater using data collected from literatures. ${\delta}^{13}C$, ${\delta}^{37}Cl$ and ${\delta}D$ of TCE give some information regarding sources of TCE because they show specific value according to manufacturing method. Also, TCE do not show a significant isotopic fractionation owing to adsorption and dilution. The isotopic fractionation mainly occurs by biodegradation. In addition, isotopic fractionation factor for TCE is different according to a kind of microorganism participated in biodegradation. However, the isotopic data of TCE have to be applied with chemical compositions of TCE and other hydrogeologic factors because isotopic fractionation of TCE is influenced by various factors.