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Selective Removal of Cr (VI) and Cr (III) in Aqueous Solution by Surface Modified Activated Carbon
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  • Journal title : Carbon letters
  • Volume 9, Issue 1,  2008, pp.23-27
  • Publisher : Korean Carbon Society
  • DOI : 10.5714/CL.2008.9.1.023
 Title & Authors
Selective Removal of Cr (VI) and Cr (III) in Aqueous Solution by Surface Modified Activated Carbon
Lee, Jeong-Min; Kim, Min-Il; Lee, Young-Seak;
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 Abstract
The adsorption and reduction of Cr (VI) to Cr (III) by surface modified activated carbon (AC) in an aqueous solution was studied. The effects of surface modifications on the properties of the carbons were investigated by the analysis of specific surface area, carbon surface pH, acid/base surface values and functional groups. In order to understand the Cr(VI) adsorption and reduction ratio from Cr(VI) to Cr(III), the Cr adsorption capacity of AC was also measured and discussed by using inductively coupled plasma and UV spectrophotometer. The modifications bring about substantial variation in the chemical properties whereas the physical properties such as specific surface area, pore volume and pore size distribution nearly were not changed. Total Cr adsorption efficiency of as-received activated carbon (R-AC) and nitric acid treated activated carbon (N1-AC and N2-AC) were recorded on 98.2, 99.7 and 100%. Cr(III) reduction efficiency of R-AC increased largely from 0.4% to 28.3% compared to N1-AC and N2-AC.
 Keywords
Chromium;Adsorption;Surface modification;Functional group;Desorption;Activated carbon;
 Language
English
 Cited by
1.
콜타르피치 기반 활성탄소섬유의 제조 및 특성에 관한 연구. II. 물리적 활성화법에 의한 활성탄소섬유의 구리(II), 니켈(II) 흡착 특성,최보경;윤광의;서민강;박수진;

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