Selective Removal of Cr (VI) and Cr (III) in Aqueous Solution by Surface Modified Activated Carbon
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서지정보
ㆍ발행기관 : 한국탄소학회
ㆍ수록지정보 : Carbon Letters / 9권 / 1호
ㆍ저자명 : Jeong-Min Lee, Min-Il Kim, Young-Seak Lee
ㆍ저자명 : Jeong-Min Lee, Min-Il Kim, Young-Seak Lee
목차
1. Introduction2. Experimental
3. Results and discussion
4. Conclusions
5. References
한국어 초록
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) adsorptionand 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