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;
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.
Copper oxide-decorated porous carbons for carbon dioxide adsorption behaviors, Journal of Colloid and Interface Science, 2010, 342, 2, 575
Preparation and Characterization of Coal Tar Pitch-based Activated Carbon Fibers. II. Cu(II) and Ni(II) Adsorption in Activated Carbon Fibers during Physical Activation, Textile Science and Engineering, 2015, 52, 2, 97
Babel, S.; Kurniwan, T. A. Chemosphere 2004, 54, 951.
Richard, F. C.; Bourg, A. C. M. Water research 1991, 25, 807.
Rorrer, G. L. "Heavy metal ions, removal from wastewater", ed. R. A. Meyers, Wiley, New York, 1998, 2102.
Mohan, D.; Pittman, C. U. J. Hazard. Mater. B 2006, 137, 767.
Huang, C. P.; Wu, M. H. J. Water Pollut. Contr. Fed. 1975, 47, 2437.
Huang, C. P.; Wu, M. H. Water Res. 1977, 11, 673.
Huang, C. P.; Bowers, A. R. Prog. Water Technol. 1978, 10, 45.
Aggarwal, D.; Goyal, M.; Bansal, R. C. Carbon 1999, 37, 1989.
Hu, Z.; Lei, L.; Li, Y. ; Ni, Y. Sep. Purif. Technol. 2003, 31, 13.
Gonzalez, S. E.; Cordero, T.; Rodriguez, J.; Cotoruelo, L.; Rodriguez, J. J. Water Res. 2004, 38, 3043.
Rivera, U. J.; Sanchez, P. M. Water Res. 2003, 37, 3335.
Monser, L.; Adhoum, N. Sep. Purif. Technol. 2002, 26, 137.
Chu, K.H.; Hashim, M.A. J. Ind. Eng. Chem. 2003, 9, 163.
Brunauer, S.; Emmett, P. H.; Teller, E. J. Am. Chem. Soc. 1938, 60, 309.
Boehm, H. P. Carbon 2002, 40, 145.
Salame, I. I.; Bandosz, T. J. J. Colloid Interf. Sci. 1999, 210, 367.
APHA, "Standard methods for the examination of water and wastewater", Vol. 19, New york, 1995.
Castilla, C. M.; Ramon, M. V. L.; Marin, F. C. Carbon 2000, 38, 1995.