• Natural Dissipation of Chlorinated Volatile Organic Compounds Released in Soil : Effect of Moisture Content and Carbon Source
  • Cho Chang-Hwan;Choi Sang-Il;
  • Environmental Management Corporation;Department of Environmental Engineering, Kwangwoon University;
  • 토양에 유출된 염소계 휘발성 유기물질의 자연저감 : 수분과 탄소원의 영향
  • 조장환;최상일;
  • 환경관리공단;광운대학교 환경공학과;
Abstract
This study was to evaluate sorption and biodegradation rate affecting the natural dissipation of chlorinated volatile organic compounds (CVOCs) in surface soil. To show the effect of sorption and biodegradation on the natural dissipation of 1,1,1-trichloroethane (TCA), trichloroethylene (TCE) and tetrachloroethylene (PCE), three types of vial experiments were employed; (1) sterilized, (2) non-sterilized, (3) non-sterilized/substrate enriched. Also three moisture contents was applied to find the moisture effect in each vial; (1) wilting point (12%, w/w), (2) field capacity (29%, w/w), (3) saturation (48%, w/w). The results suggested that keeping the soil moisture content at field capacity was desirable for TCA and TCE natural dissipation in the vial study.

본 연구에서는 토양에 유출된 염소계 휘발성 유기물질의 자연저감에 대한 흡착과 미생물분해의 영향을 알아보았다. 대표적인 염소계 휘발성 유기물질인 TCA (1,1,1-trichloroethane), TCE (trichloroethylene) 및 PCE (tetrachloro ethylene)의 자연저감율을 비교하기 위해 세가지 조건에서 바이얼 실험을 수행하였다; (1) 멸균, (2) 비멸균 그리고 (3) 비멸균/탄소원첨가. 또한 각각의 조건에서 수분함량에 의한 영향을 알아보기 위해 세 가지로 적용하였다; (1) wilting point (12%, w/w), (2) field capacity (29%, w/w), (3) saturation (48%, w/w). 100일 경과 후, TCA 및 TCE는 field capacity에서 미생물에 의한 자연저감이 상대적으로 활발히 일어났다. 비멸균/탄소원 첨가 토양은 멸균한 토양에 비해 유기물질의 제거율에서 현격한 차이를 나타내었다. PCE는 미생물 및 탄소원 첨가에 의한 영향을 보이지 않았다.

Keywords: Chlorinated volatile organic compounds;Sorption;Biodegradation;Natural dissipation;Moisture content;

Keywords: 염소계 휘발성 유기물질;흡착;미생물 분해;자연저감;수분함량;

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This Article

  • 2005; 10(3): 46-51

    Published on Jun 1, 2005