• Title/Summary/Keyword: Coal-Based Activated Carbon

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Effect of Pore Structure Change on the Adsorption of NOM and THMs in Water Due to the Increase of Reactivation Number of Coal-based Activated Carbon (석탄계 활성탄의 재생 횟수 증가에 따른 세공 구조 변화가 수중의 NOM과 THM 흡착에 미치는 영향)

  • Son, Hee-Jong;Ryu, Dong-Choon;Jang, Seong-Ho
    • Journal of Korean Society of Environmental Engineers
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    • v.32 no.10
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    • pp.965-972
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    • 2010
  • The objective of this research was to evaluate for the changes of pore structures and adsorption capacities due to the increase the numbers of reactivation. The reactivated GAC had experienced three cycles of water treatment and thermal reactivation. The pore size distributions of virgin and reactivated GACs were very different. The virgin GAC was mostly microporous (< $15\;{\AA}$), with less mesopores ($20{\sim}100\;{\AA}$). The reactivated GACs was mostly mesoporous ($20{\sim}100\;{\AA}$), with less micropores (< $15\;{\AA}$). The specific surface area and total pore volume were reduced as the number of reactivation increased. The maximum adsorption capacity (X/M) of virgin GAC ($964.6\;{\mu}g/g$) for $CHCl_3$ was 2~3 times larger than 1st~3rd reactivated GAC ($255.6{\sim}399.5\;{\mu}g/g$). The maximum adsorption capacity (X/M) of virgin GAC (19.5 mg/g) for DOC (dissolved organic carbon) was equal to that of 1st~3rd reactivated GAC (18.0~18.7 mg/g).