알럼 슬러지 기반 흡착제의 Zn 처리 특성 평가
Assessment on Zn Treatment Characteristics of Alum Sludge-based Adsorbent
- 주제(키워드) Zinc removal , Adsorption kinetics , Breakthrough point , pH adsorption edge , Surface precipitation
- 발행기관 한국지하수토양환경학회
- 발행년도 2025
- 총서유형 Journal
- KCI ID ART003180844
- 본문언어 한국어
초록/요약
Zinc present in mine drainage, wastewater, and contaminated groundwater is difficult to treat using conventional passivetreatment technologies. This study evaluated an alum sludge-based adsorbent through column and batch experiments,including adsorption kinetics, isotherms, and pH edge analysis. Over 341 days, the column experiment reduced Znconcentrations (4.6 – 6.4 mg/L) to below 1 mg/L within a 4-hour residence time, meeting effluent standards. The breakthroughpoint was observed at approximately 1,432 bed volumes, corresponding to 9 months of operation. The adsorbent increasedpH, likely due to the adsorption of H+ ions, and facilitated the precipitation of Zn as hydroxides on its surface. Even if thesurface precipitation effect was excluded, the maximum adsorption capacity was calculated to be 5.5 mg/g. Therefore, thisadsorbent, recycled from alum sludge, is expected to efficiently treat Zn in adsorption reactors and permeable reactivebarriers.
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