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Column filled with Fe-GAC and GAC to remove both As(V) and Fe(III)

비소와 철 동시제거를 위한 Fe-GAC와 GAC로 충진된 컬럼

Lee, Yong-Soo;Do, Si-Hyun;Hong, Seong-Ho
이용수;도시현;홍성호

  • Received : 2015.12.03
  • Accepted : 2016.02.04
  • Published : 2016.02.28

Abstract

First of all, Fe or/and Mn immobilized granular activated carbons (Fe-GAC, Mn-GAC, (Fe, Mn)-GAC) were synthesized and tested to remove arsenate (As(V)). The results in batch test indicated that Fe-GAC removed As(V) effectively, even though the surface area of Fe-GAC was reduced largely. Moreover, adsorption isotherm test indicated that the experimental data fit well with Langmuir model and the maximum adsorption capacity ($q_{max}$) of Fe-GAC for As(V) was $3.49mg\;g^{-1}$, which was higher than GAC ($2.24mg\;g^{-1}$). In column test, the simulated water, which consisted of As(V), Fe(III), Mn(II) and Ca(II) in tap water, was used. Fe-GAC column with 1 hr of pre-washing time treated As(V) effectively while GAC column removed Fe(III) better than Fe-GAC column. Moreover, the increasing pre-washing time from 1 to 9 hour in Fe-GAC column enhanced Fe(III) removal with little negative impact of As(V) removal. Mostly, the column filled with Fe-GAC and GAC (i.e. the mass ratio of Fe-GAC:GAC = 2:8) showed the higher treatability of both As(V) and Fe(III), even it operated with 1 hr pre-washing time.

Keywords

Adsorption;Arsenate;Fe-GAC;Fe-GAC + GAC column;Iron

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Acknowledgement

Supported by : (사)국경 없는 과학기술자회, 한국연구재단