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Selective Removal of Cr (VI) and Cr (III) in Aqueous Solution bySurface Modified Activated Carbon

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2008, 9(1), pp.23-27
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General

Jeong-Min Lee 1 Young-Seak Lee 1 Min-Il Kim 1

1Chungnam National University

Candidate

ABSTRACT

The adsorption and reduction of Cr (VI) to Cr (III) by surface modified activated carbon (AC) in an aqueous solution wasstudied. The effects of surface modifications on the properties of the carbons were investigated by the analysis of specificsurface area, carbon surface pH, acid/base surface values and functional groups. In order to understand the Cr(VI) adsorptionand reduction ratio from Cr(VI) to Cr(III), the Cr adsorption capacity of AC was also measured and discussed by usinginductively coupled plasma and UV spectrophotometer. The modifications bring about substantial variation in the chemicalproperties whereas the physical properties such as specific surface area, pore volume and pore size distribution nearly were(N1-AC and N2-AC) were recorded on 98.2, 99.7 and 100%. Cr(III) reduction efficiency of R-AC increased largely from0.4% to 28.3% compared to N1-AC and N2-AC.

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