화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Applied Chemistry for Engineering, Vol.26, No.1, 92-98, February, 2015
Export Citation
활성탄소의 불소화가 크롬이온 흡착에 미치는 영향
Effects of the Fluorination of Activated Carbons on the Chromium Ion Adsorption
김민지, 정민정, 최석순1, 이영석†
  • 충남대학교 바이오응용화학과
  • 1세명대학교 바이오환경공학과
Min-Ji Kim, Min-Jung Jung, Suk Soon Choi1, and Young-Seak Lee†
  • Department of Applied Chemistry and Biological Engineering, Chungnam National University, Daejeon 305-764, Korea
  • 1Department of Biological and Environmental Engineering, Semyung University, Jecheon 390-711, Korea
E-mail:
초록
본 연구에서는 페놀계 활성탄소를 다양한 불소 분압(0.01∼0.03 MPa)으로 불소화를 실시하였으며, 불소화된 활성탄소의 6가 크롬 흡착 특성을 조사하였다. BET와 XPS 결과로부터, 불소화 처리된 활성탄소는 비표면적 및 총 기공부피가 각각 24.7, 58.8% 증가되었으며, 활성탄소 표면에 불소 관능기가 도입됨을 알 수 있었다. 불소 분압이 0.02 MPa일 때, 크롬이온 흡착에 최적화된 표면처리 조건임을 확인하였다. 또한, 초기농도 300 mg/L에서 98%의 제거효율을 나타내었으며, 이러한 결과는 미처리 활성탄소와 비교하여 약 3배 증가됨을 알 수 있었다. 한편, 불소화된 활성탄소의 크롬이온 흡착은 미처리 활성탄소와 대조적으로 30 min 이내에 완료되었으며, 이러한 현상은 페놀계 활성탄소의 표면에서 크롬 이온과의 친화성 증가에 의한 것으로 판단되었다.
In this study, phenol-based activated carbons (ACs) were fluorinated at various fluorine partial pressures (0.01∼0.03 MPa) and the Cr6+ ion adsorption of fluorinated ACs was investigated. According to BET and XPS results, the specific surface area and total pore volume of fluorinated ACs increased by 24.7 and 55.8%, respectively, and fluorine functional groups were introduced to AC surface. The most optimized condition of Cr6+ ion adsorption was confirmed at the fluorine partial pressure of 0.02 MPa. And also the removal efficiency of Cr6+ ion was up to 98% at 300 mg/L of the initial concentration, and these results showed an approximately three-fold increase compared to that of using untreated ACs. Furthermore, the Cr6+ ion adsorption of fluorinated ACs was completed in less than 30 min in contrast with untreated ACs, which was expected to be an increase of the affinity between Cr6+ ions and ACs surfaces by fluorination.
Keywords:Cr(Ⅵ);removal;adsorption;fluorination;activated carbon
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