Chromium(VI) Removal by Modified PVP-Coated Silica Gel
Publication: Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management
Volume 4, Issue 3
Abstract
This research involved the synthesizing of a reactive polymer, long alkyl quaternized poly(4-vinylpyridine) (PVP), and coating it onto the surface of silica gel to produce a granular sorbent to remove Cr(VI) from water. Batch experiments were conducted to determine the kinetics, sorption isotherm, pH effects, and desorption of the sorbed Cr(VI). The research demonstrated that the synthesized PVP-coated silica gel (referred to as coated gel) could successfully remove chromium(VI) from solution. The adsorption of Cr(VI) by the coated gel was strongly influenced by the pH. The maximum sorption occurred at about pH 4.5–5.5 under the test conditions. The removal efficiency was 100% when the initial Cr(VI) concentration was 2.5 mg/L, with 2.5 g/L of coated gel at pH 5.0. The concentrations of Cr(VI) had a pronounced effect on the rate of sorption. Compared with ion exchange, the sorption kinetics of Cr(VI) was fast (about 5 h). The equilibrium sorption data fitted the Langmuir isotherm model. Chromium adsorbed on the coated gel was easily recovered under certain conditions. A continuation of this work dealing with the effects of concentration of Cr(VI) and of other anions on the Cr(VI) removal by PVP-coated silica gel will be published in a subsequent issue.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Brower, J. B., Ryan, R. L., and Pazirandeh, M. (1997). “Comparison of ion-exchange resins and biosorbents for the removal of heavy metals from plating factory wastewater.” Envir. Sci. and Technol., 31(10), 2910–2914.
2.
Chanda, M., and Rempel, G. L. (1997). “Chromium(III) removal by epoxy-cross-linked poly(ethylenimine) used as gel-coat on silica.” Ind. and Engrg. Chem. Res., 36(6), 2184–2189.
3.
Chanda, M., and Rempel, G. L. (1993). “Poly(4-Vinylpyridine) gel-coated on silica. High capacity and fast kinetics in uranyl sulfate recovery.” Ind. and Engrg. Chem. Res., 32(4), 726–732.
4.
Chanda, M., and Rempel, G. L. (1994). “Quaternized poly(4-vinylpyridine) gel-coated on silica. Fast kinetics of diffusion-controlled sorption of organic sulfonates.” Ind. and Engrg. Chem. Res., 33(3), 623–630.
5.
Chen, C. (1994). “A new Cr(VI) adsorbing agent.” Huanjing Wuran Yu Fangzhi, 16(2), 27–28 (in Chinese).
6.
Ciavatta, C., Montecchio, D., and Sequi, P. (1992). “Applicazione di un test rapidoper la determinazione del potere ossidante del terreno nei confronti del cromo.” Acqua Aria., 9, 875–879 (in Italian).
7.
Clevenger, T., and Novak, J. T. (1983). “The recovery of metals from electroplating wastes using liquid-liquid extraction.” J. Water Pollution Control Fedn., 55(7), 984–989.
8.
Fraser, B. G., and Pritzker, M. D. (1994). “Removal and recovery of chromium from aqueous effluents.” Separation Sci. and Technol., 29(16), 2097–2116.
9.
Heary, L. E., and Ray, D. (1987). “Kinetics of Cr(III) oxidation to Cr(VI) by reaction with MnO2.” Envir. Sci. and Technol., 21, 1187–1193.
10.
Huang, C. P., and Wu, M. H. (1977). “The removal of chromium(VI) from dilute aqueous solution by activated carbon.” Water Res., 673–679.
11.
Macauley, E., and Hong, A. (1995). “Chelation extraction of lead from soil using pyridine-2,6-dicarboxylic acid.” J. Haz. Mat., 40, 257–270.
12.
Norvelle, N. R. (1992). “Removal of chromium from water.” Proc., 5th Annu. Haz. Water Mgmt. Conf., Sandia National Laboratory, Albuquerque, N.M.
13.
Ouki, S. K., and Neufeld, R. D. (1997). “Use of activated carbon for the recovery of chromium from industrial wastewater.” J. Chem. Technol. and Biotech., 70(1), 3–8.
14.
Patterson, J. W., and Passino, R. ( 1987). Metals separation and recovery. Metal speciation separation and recovery. Lewis, Chelsea, Mich.
15.
Petruzzelli, D., and Tiravanti, G. (1995). “Ion exchange process for chromium removal and recovery from tannery waster.” Ind. and Engr. Chem. Res., 34(8), 2612–2617.
16.
Santiago, I. ( 1995). “Removal of hexavalent chromium from water using tailored zeolites.” PhD dissertation, New Mexico State University, Las Cruces, N.M.
17.
Shen, H., and Wang, Y. T. (1995). “Hexavalent chromium removal in two-state bioreactor system.”J. Envir. Engrg., ASCE, 121(11), 798– 804.
18.
Snoeyink, V. L. ( 1990). “Adsorption of organic compounds.” Water quality and treatment, F. W. Pontius, ed., McGraw-Hill, New York.
19.
Streat, M. (1984). “Kinetics of slow diffusing species in ion exchangers.” React. Polym., 2, 79–91.
20.
Tiravanti, G., and Petruzzelli, D. (1996). “Low and non waste technologies for metals recovery by reactive polymers.” Waste Mgmt., 16(7), 597–605.
21.
Weber, W. J. (1972). Physicochemical processes for water quality control, Wiley, New York.
22.
U.S. EPA. (1980). “EPA control and treatment technology for the metal finishing industry.” Sulfide precipitation, EPA-625/8-80-003, Environmental Protection Agency, Cincinnati, Ohio.
Information & Authors
Information
Published In
Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management
Volume 4 • Issue 3 • July 2000
Pages: 105 - 110
History
Received: Mar 22, 2000
Published online: Jul 1, 2000
Published in print: Jul 2000
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.