상하수도학회지 (Journal of Korean Society of Water and Wastewater)

  • 제38권4호
  • /
  • Pages.199-208
  • /
  • 2024
  • /
  • 1225-7672(pISSN)
  • /
  • 2287-822X(eISSN)
대한상하수도학회 (The Korean Society of Water and Wastewater)
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입상 활성탄 및 표면 개질 활성탄의 장·단사슬 PFCA와 PFSA 흡착 특성

The characteristics of long- and short- chain PFCA and PFSA adsorption on granular activated carbon and surface-modified granular activated carbon

  • 신정우 (상명대학교 건설.환경.의생명공학과) ;
  • 최상기 (부산광역시 상수도사업본부 수질연구소) ;
  • 손희종 (부산광역시 상수도사업본부 수질연구소) ;
  • 안병렬 (상명대학교 건설시스템공학과)
  • Jeongwoo Shin (Department of Civil, Environmental, and Biomedical Engineering, Sangmyung University) ;
  • Sangki Choi (Water Quality Institue, Busan Water Authority) ;
  • Heejong Son (Water Quality Institue, Busan Water Authority) ;
  • Byungryul An (Department of Civil Engineering, Sangmyung University)
  • 투고 : 2024.05.20
  • 심사 : 2024.06.12
  • 발행 : 2024.08.15
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초록

In this paper, the adsorption removal characteristic for 10 species of perfluoroalkyl and polyfluoroalkyl substances (PFAS) was investigated using GAC and modified GAC (GAC-Cu). After modification with Cu(II), the amount of copper was to 1.93 and 4.73 mg/g for GAC and GAC-Cu, respectively. The total amount of 10 species of PFAS per specific area was obtained to 0.548 and 0.612 ng/m2 for GAC and GAC-Cu, respectively. A series of batch test confirmed lower efficiency was observed with a smaller number of carbon chain length and the removal efficiency of PFCA (perfluoroalkyl carboxylic acids) was lower than that of PFSA (perfluoroalkyl sulfonic acids) with the same carbon chain length. Regarding the pH effect, the adsorption capacity was decreased with increase of pH due to the increase of electrostatic repulsion. According to pseudo first and second order (PFO and PSO) kinetic models, while the values of equilibrium uptake and time did not show significant difference, a difference in uptake was observed between 24-48h. Furthermore, based on correlation analysis, Log Kow and uptake have a high correlation with molecular weight (M.W.) and initial concentration, respectively. These results show that long-chain PFAS have higher removal efficiency due to their increased hydrophobicity.

키워드

과제정보

본 연구 성과는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구(No.2022R1A2C1092752)와 환경부 및 한국환경산업기술원의 2024년도 녹색융합전문인력양성 지원사업을 통해 수행된 연구임.

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