Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Transport of Colloids and Contaminant in Riverbank Filtration

강변여과에서 콜로이드 물질과 오염물의 거동에 관한 연구

  • Lee Sang-Il (Dept. of Civil and Environment Engrg., Dongguk Univ.) ;
  • Kim Dae-Hwan (Dept. of Civil and Environment Engrg., Dongguk Univ.) ;
  • Lee Sang-Sin (Dept. of Civil and Environment Engrg., Dongguk Univ.) ;
  • You Sang-Yeon (Dept. of Civil and Environment Engrg., Dongguk Univ.)
  • 이상일 (동국대학교 공과대학 토목환경공학과) ;
  • 김대환 (동국대학교 공과대학 토목환경공학과) ;
  • 이상신 (동국대학교 공과대학 토목환경공학과) ;
  • 유상연 (동국대학교 공과대학 토목환경공학과)
  • Published : 2006.06.01
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Abstract

Riverbank filtration is a natural process, using alluvial aquifers to remove contaminants and pathogens in river water for the production of drinking water. In Korea, most of the drinking water is supplied by surface water in-take. However, maintaining the quality of the drinking water becomes more and more difficult due to the increase of contamination. In riverbank filtration, the understanding of contaminant transport is an important task for the production of high quality drinking water and for the maintenance of facilities. In this paper, the transport behavior of hydrophobic organic contaminants is investigated when contaminants coexist with dissolved organic matter (DOM) and bacteria. In the developed model, the aquifer is thought of as a four phase system: two mobile colloidal phases, an aqueous phase, and a stationary solid matrix phase. The model equations are solved numerically for various situations. Results indicate that the presence of colloidal matters can enhance the mobility of contaminant significantly and that partitioning coefficients play an important role in the process.

강변여과는 강물을 강변의 충적대수층에 통과시켜 지층의 자체정화능력을 이용하여 오염물질을 상당량 저감시킨 후 양수하는 방식이다. 국내에서는 대부분의 원수를 지표수에서 취수하여 사용하고 있는 실정이나, 오염물질의 증가로 인하여 지표수를 원수로 사용하기가 점점 어려워지고 있다. 강변여과를 이용하여 양질의 원수를 확보하기 위해서는 오염물 이동에 관한 이해가 중요하다. 본 연구에서는 대수층에 용존성 유기물질(DOM)과 박테리아가 동시에 존재할 경우를 대상으로 대수층을 4상(four-phase: 흙입자, 물, 박테리아, 용존성 유기물질)으로 모델링하고, 이들의 물리, 화학, 생물학적 특성을 고려하여 물질의 거동을 기술하는 수학적 모델을 제시하였다. DOM과 박테리아와 같은 콜로이드성 물질은 오염물의 이동을 가속시키고, 평형 분배계수가 중요한 역할을 하는 인자인 것으로 나타났다.

Keywords

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