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.

1. 서 론
2. 실험 재료 및 방법
    2.1 활성탄 표면 개질 및 PFAS 용액 제조
    2.2 PFAS 제거 및 Cu 용출 실험
    2.3 분석 방법
3. 결과 및 고찰
    3.1 PFAS 제거효율 비교
    3.2 pH에 따른 PFAS 흡착능 비교
    3.3 반응속도 실험
4. 결론
사 사

• 신정우(상명대학교 건설, 환경, 의생명공학과) | Jeongwoo Shin (Department of Civil, Environmental, and Biomedical Engineering, Sangmyung University)
• 최상기(부산광역시 상수도사업본부 수질연구소) | Sangki Choi (Water Quality Institue, Busan Water Authority)
• 손희종(부산광역시 상수도사업본부 수질연구소) | Heejong Son (Water Quality Institue, Busan Water Authority)
• 안병렬(상명대학교 건설시스템공학과) | Byungryul An (Department of Civil Engineering, Sangmyung University) Corresponding author