Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)
- 2000.11a
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- Pages.435-442
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- 2000
Development of Nutrients and Heavy Metals Removal Technology in Saturated Zone Using Zeolite
포화 지층내 영양염류 및 중금속의 제거를 위한 제올라이트의 적용인자 도출
Abstract
Batch test and column test were performed to develop the design factors for permeable reactive barriers(PRBs) against ammonium and heavy metals, Clinoptilolite, a kind of natural zeolites having excellent cation exchange capacity(CEC), was choosen for the reacting materials through the ion-exchange mechanism. In the batch test, the reactivity of clinoptilolite for ammonium, lead, and copper was examined varying the initial concentration of contaminants(ammonium: 20, 40, 80 ppm, heavy metals: 10, 20, 40 ppm) and the particle size of clinoptilolites(0-0.15, 0.42-0.85, 1-1.25 mm). The reactivity is increasing as the initial concentration decrease and particle size decrease. In the column test, the permeability and the reactivity of the specimens were examined using flexible-wall permeameter. Specimens were made of clinoptilolite and Jumunjin-sand with 20 : 80 weight ratio varying particle size of clinoptilolite. The maximum permeability(1
Keywords
- permeable reactive barriers;
- clinoptilolite;
- ion exchange;
- ammonium;
- heavy metal;
- flexible-wall permeameter