Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Adsorption Characteristics of Chromium Ion at Low Concentration Using Oxyfluorinated Activated Carbon Fibers

함산소불화 활성탄소섬유를 이용한 저농도 크롬이온의 흡착 특성

  • Kim, Min-Ji (Department of Applied Chemistry and Biological Engineering, Chungnam National University) ;
  • Jung, Min-Jung (Department of Applied Chemistry and Biological Engineering, Chungnam National University) ;
  • Choi, Suk Soon (Department of Biological and Environmental Engineering, Semyung University) ;
  • Lee, Young-Seak (Department of Applied Chemistry and Biological Engineering, Chungnam National University)
  • 김민지 (충남대학교 바이오응용화학과) ;
  • 정민정 (충남대학교 바이오응용화학과) ;
  • 최석순 (세명대학교 바이오환경공학과) ;
  • 이영석 (충남대학교 바이오응용화학과)
  • Received : 2015.04.07
  • Accepted : 2015.05.18
  • Published : 2015.08.10
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Abstract

In this work, activated carbon fibers (ACFs) were oxyfluorinated and their adsorption ability for the low concentration of hexavalent chromium in an aqueous solution was investigated. The pore structure and surface properties of ACFs were examined by BET and X-ray Photoelectron Spectroscopy (XPS), respectively. Due to the oxyfluorination treatment, the content of (C-O) bond on ACFs surface which influences the adsorption capacity for heavy metal ions increased largely, resulting that $Cr^{6+}$ adsorption equilibrium reached quickly within 10 min. In addition, the maximum removal efficiency at the initial $Cr^{6+}$ concentration of 20 ppm was observed, which is a 100% improvement compared to that of non-treated ACFs. These results suggest that the oxyfluorination of ACFs can be applied as a good surface treatment for the effective adsorption of the low concentration of $Cr^{6+}$.

본 연구에서는 활성탄소섬유(ACFs)에 함산소불화 표면처리를 수행하여 수용액상에 존재하는 저농도 $Cr^{6+}$ 이온의 흡착특성을 조사하였다. ACFs의 기공구조와 표면특성은 BET와 X선 광전자 분광기(XPS)를 통해 각각 확인하였다. ACFs의 함산소불화 처리는 ACFs의 표면에 중금속 흡착 능력에 영향을 미치는 C-O 결합의 비율을 크게 증가시켰으며, 그 결과 $Cr^{6+}$ 흡착이 10 min 이내에 빠르게 평형에 도달할 수 있었다. 또한 초기 $Cr^{6+}$ 농도 20 ppm에서 최대 $Cr^{6+}$ 제거효율은 미처리 ACFs와 비교하여 약 100% 증가하였다. 이러한 결과로부터 ACFs의 함산소불화 반응은 저농도 $Cr^{6+}$의 흡착을 위한 표면처리법으로 응용될 수 있을 것이다.

Keywords

References

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