Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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Degradation of TPHs, TCE, PCE, and BTEX Compounds for NAPLs Contaminated Marine Sediments Using In-Situ Air Sparging Combined with Vapor Extraction

증기추출법과 결합된 공기주입법을 이용한 비수용성액체 해양퇴적물의 TPHs, TCE, PCE 및 BTEX 정화

  • Lee, Jun-Ho (Department of Environmental Science and Engineering, Hankuk University of Foreign Studies) ;
  • Han, Sun-Hyang (Department of Environmental Science and Engineering, Hankuk University of Foreign Studies) ;
  • Park, Kap-Song (Department of Environmental Science and Engineering, Hankuk University of Foreign Studies)
  • 이준호 (한국외국어대학교 환경학과) ;
  • 한선향 (한국외국어대학교 환경학과) ;
  • 박갑성 (한국외국어대학교 환경학과)
  • Received : 2013.05.18
  • Accepted : 2013.10.06
  • Published : 2013.10.28
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Abstract

This study was carried out in order to determine the remediation of total petroleum hydrocarbons (TPHs), trichloroethylene (TCE), perchloroethylene (PCE), benzene, toluene, ethylbenzene and xylenes (BTEX) compounds for non-aqueous phase liquids (NAPLs) using in-situ air sparging (IAS) / vapor extraction (VE) with the marine sediments of Mandol, Hajeon, Sangam and Busan, South Korea. Surface sediment of Mandol area had sand characteristics (average particle size, 1.789 ${\Phi}$), and sandy silt characteristics (average particle size, 5.503 ${\Phi}$), respectively. Sangam surface sediment had silt characteristics (average particle size, 5.835 ${\Phi}$). Sediment characteristics before experiment in the Busan area showed clay characteristics (average particle size, 8.528 ${\Phi}$). TPHs level in the B1 column of Mandol, Hajeon, Sangam, and Busan sediments were 2,459, 6,712, 4,348, and 14,279 ppm. B2 (3 L/min) to B5 (5 L/min) columns reduced 99.5% to 100.0% of TCE and 93.2% to 100.0% of PCE. Removal rates of TCE, PCE, and BTEX are closely correlated (0.90-0.99) with particle sizes and organic carbon concentrations. However, TPHs (0.76) and benzene (0.71) showed the poorer but moderate correlations with the same parameters.

이 연구는 공기주입법(in-situ air sparging; IAS)이 결합된 증기추출법(vapor extraction; VE)을 이용한 실내 실험 연구로 비수용성액체 유기물(non-aqueous phase liquids; NAPLs)의 총유류계탄화수소(total petroleum hydrocarbons; TPHs), 트리클로에틸렌(trichloroethylene; TCE), 퍼클로로에틸렌(perchloroethylene; PCE), 벤젠(benzene), 톨루엔(toluene), 에틸벤젠(ethylbenzene) 및 크실렌(xylenes)을 제거하기 위한 목적으로 국내 만돌, 하전, 상암, 부산만내 해양 퇴적물들을 대상으로 실험 하였다. 만돌 퇴적물은 사질(sand; S) 특성(평균입도 1.789 ${\Phi}$), 하전은 모래실트(sandy Silt; sZ) 특성(평균입도 5.503 ${\Phi}$) 및 상암은 실트(Silt; Z) 특성(평균입도 5.835 ${\Phi}$)을 나타내었다. 그리고 부산지역 퇴적물은 점토(Clay; C) 특성(평균입도 8.528 ${\Phi}$)을 나타내었다. 48시간 동안 공기를 주입하지 않은 B1 (0 L/min) 컬럼에서 남아있는 TPHs는 만돌, 하전, 상암지역 및 부산지역 샘플퇴적물에서 각각 약 2,459, 6,712, 4,348, 14,279 ppm으로 분석 되었다. 그리고 만돌, 하전, 상암지역 및 부산지역 샘플퇴적물의 B2 (3 L/min)-B5 (5 L/min) 컬럼에서 TCE는 99.5-100.0% 제거되었으며, PCE는 93.2-100.0%까지 제거된 결과를 보였다. 입자크기에 따른 각 성분의 제거량과의 상관관계는 TCE, PCE, toluene, etylbenzene, xylene, BTEX에서 모두 0.90-0.99의 밀접한 상관계수를 보였다. 그러나 TPHs에서는 0.76, Benzene에서는 0.71의 낮은 상관계수를 보였다.

Keywords

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