양이온 물질로 오염된 지하수 정화를 위한 반응벽체 개발 : 제올라이트의 적용성 평가

  • 이승학 (서울대학교 공과대학 지구환경시스템공학부) ;
  • 이재원 (서울대학교 공과대학 지구환경시스템공학부) ;
  • 김시현 (한라산업주식회사) ;
  • 박준범 (서울대학교 공과대학 지구환경시스템공학부) ;
  • 박상권 (동국대학교 공과대학 기계화학공학부)
  • 발행 : 2001.09.01

초록

Batch test and column test were performed to develop the design factors for PRBs against the contaminated groundwater by ammonium and lead. Clinoptilolite, one of the natural zeolites having excellent cation exchange capacity(CEC), was chosen as the reactive material through the ion-exchange mechanism. In the batch test, the reactivity of Clinoptilolite to ammonium and lead was examined with varying the particle size of Clinoptilolite. The nit weight of Clinoptilolite showed removal efficiencies of 65 % against the ammonium and 98% against lead. The effect of particle size of Clinoptilolite was not noticeable. In the column test, the permeability was examined using flexible-wall permeameters with varying the particle size of Clinoptilolite. When the washed Clinoptilolite having the diameter of 0.42-0.85 nm was mixed with Jumunjin sands in 20:80 ratio (w/w), the highest permeability of 2$\times$10$^{-3}$ -7 x 10$^{-4}$ cm/s was achieved. The reactivity and the strength property of the mixed material were investigated using fixed wall column having 8 sampling ports on the wall and the direct shear test, respectively. Clinoptilolite was found to be a suitable material for PRBs against the contaminated groundwater with ammonium and/or heavy metals.

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