상하수도학회지 (Journal of Korean Society of Water and Wastewater)

  • 제34권6호
  • /
  • Pages.425-435
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  • 2020
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  • 1225-7672(pISSN)
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  • 2287-822X(eISSN)
대한상하수도학회 (The Korean Society of Water and Wastewater)
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활성탄 개질에 따른 표면 특성 변화가 2,4-dichlorophenol 흡착성능에 미치는 영향

Effects of chemical modification on surface characteristics and 2,4-dichlorophenol adsorption on activated carbon

  • An, Sun-Kyung (Department of Environmental Engineering, Konkuk University) ;
  • Song, Won-Jung (Department of Environmental Engineering, Konkuk University) ;
  • Park, Young-Min (Department of Environmental Engineering, Konkuk University) ;
  • Yang, Hyeon-A (Department of Environmental Engineering, Konkuk University) ;
  • Kweon, Ji-Hyang (Department of Environmental Engineering, Konkuk University)
  • 투고 : 2020.08.04
  • 심사 : 2020.11.08
  • 발행 : 2020.12.15
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초록

Numerous chemical modifications on activated carbon such as acidic conditioning, thermal treatment and metal impregnation have been investigated to enhance adsorption capacities of micropollutants in water treatment plants. In this study, chemical modification including acidic, alkaline treatment, and iron-impregnation was evaluated for adsorption of 2,4-dichlorophenol (2,4-DCP). For Fe-impregnation, three concentrations of ferric chloride solutions, i.e., 0.2 M, 0.4 M, and 0.8 M, were used and ion-exchange (MIX) of iron and subsequent thermal treatment (MTH) were also applied. Surface properties of the modified carbons were analyzed by active surface area, pore volume, three-dimensional images, and chemical characteristics. The acidic and alkaline treatment changed the pore structures but yielded little improvement of adsorption capacities. As Fe concentrations were increased during impregnation, the active adsorption areas were decreased and the compositional ratios of Fe were increased. Adsorption capacities of modified ACs were evaluated using Langmuir isotherm. The MIX modification was not efficient to enhance 2,4-DCP adsorption and the MES treatment showed increases in adsorption capacities of 2,4-DCP, compared to the original activated carbon. These results implied a possibility of chemical impregnation modification for improvement of adsorption of 2,4-DCP, if a proper modification procedure is sought.

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참고문헌

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