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2025 Vol.62, Issue 6 Preview Page

Research Paper

Evaluation of the Adsorption Characteristics of As(III) and As(V) using Coal Mine Drainage Sludge (CMDS)

폐석탄슬러지를 이용한 As(III) 및 As(V)제거를 위한 흡착특성 평가

Jung-Eun Kim1
,
Won-Hyun Ji2*
김 정은1
,
지 원현2*
1NeLab, Seoul, Korea
2Department of Energy & Climate Environment Fusion Technology, Hoseo University, Asan, Korea
1(재)환경기술정책연구원(NeLab)
2호서대학교 일반대학원 에너지기후환경융합기술학과
*Corresponding Author
31 December 2025. pp. 665-676
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Abstract

This study evaluated the potential of T-sludge, a coal-derived industrial by-product, for reuse as an adsorbent to remove arsenic species (As(III) and As(V)) from water. Isothermal and kinetic experiments were conducted to assess the effects of concentration, contact time, and pH. As(V) rapidly reached equilibrium at low concentrations, whereas As(III) exhibited slower adsorption but achieved higher uptake at elevated concentrations. The Langmuir isotherm model best fit the behavior of As(V), suggesting a strong adsorption affinity at low concentrations. The Dubinin–Radushkevich model further confirmed that both arsenic species were primarily removed through ion-exchange- based chemisorption. The kinetic results revealed that the pseudo-second-order model fit well across pH ranges, with As(V) demonstrating an initial adsorption rate 9.41 times higher than that of As(III), indicating faster removal. These results confirm T-sludge’s potential as a sustainable arsenic adsorbent and provide foundational data for practical water treatment applications.

Keywords
arsenic
arsenic adsorption
isotherm adsorption
kinetic model
adsorption mechanism

폐석탄슬러지(T-Sludge)를 흡착제로 이용한 등온흡착실험 및 동적흡착실험을 수행하였으며, 비소의 초기농도, 시간, pH조건에 따른 흡착 특성과 흡착 메커니즘을 분석하였다. 흡착실험결과 As(V)는 저농도에서 빠른 속도로 흡착 평형에 도달하였으며, As(III)는 느린 속도를 보이나 고농도 조건에서 더 높은 흡착량을 보이는 경향을 보였다. 등온흡착모델 결과, Langmuir모델이 가장 적합하며, 높은 흡착친화도를 나타내어 저농도에서 좋은 흡착 특성을 보였다. D-R모델결과 As(III)와 As(V) 모두 이온교환 기반의 화학흡착이 주요 메커니즘임을 확인하였다. 동적흡착실험결과, 유사 2차 반응 모델이 대부분의 pH 조건에서 높은 상관계수를 보였으며, 흡착반응속도를 잘 설명하였다. 특히 As(V)의 경우 As(III) 대비 초기흡착속도(h)가 약 9.41배 높아 빠른 제거 특성을 나타냈다. 이러한 결과는 T-Sludge가 비소 제거를 위한 재활용 흡착제로 활용 가능함을 보여주며, 향후 실제 수처리 공정 적용을 위한 기초자료로 활용될 수 있다.

키워드
비소
비소 흡착
등온 흡착
동적흡착모델
흡착 메커니즘
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Information
  • Publisher :The Korean Society of Mineral and Energy Resources Engineers
  • Publisher(Ko) :한국자원공학회
  • Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
  • Journal Title(Ko) :한국자원공학회지
  • Volume : 62
  • No :6
  • Pages :665-676
  • Received Date : 2025-09-29
  • Revised Date : 2025-11-03
  • Accepted Date : 2025-11-19
  • DOI :https://doi.org/10.32390/ksmer.2025.62.6.665
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