Abstract
The adsorption of copper, chromate, and arsenate (CCA)onto iron-oxide-coated sand (IOCS) was examined insingle-metal and mixed-metal systems. Copper andarsenate were strongly adsorbed or formed inner-spheresurface complexes with the IOCS surface while chromatewas weakly adsorbed or formed an outer-sphere surfacecomplex with the IOCS surface. Copper adsorption byIOCS slightly increased in the presence of arsenatebut was not affected by the presence of chromate. Arsenate adsorption was not affected by the presenceof copper and/or chromate. Chromate adsorptionincreased in the presence of copper by the combinationof electrostatic effects and possiblesurface-copper-chromate ternary complex formation. The presence of arsenate significantly decreasedchromate adsorption due to competition for adsorptionsites and electrostatic effects. Using inner-spheresurface complexation constants for copper and arsenateand outer-sphere surface complexation constants forchromate, the triple-layer model (TLM) was successfulin describing adsorption of copper, chromate, andarsenate in single-solute systems. The modelindicated that each metal uses a different number ofadsorption sites. For CCA metals-IOCS systems, theequilibrium constants determined from single-solutesystems were not able to predict adsorption frommulti-solute systems. The TLM does not currentlyaccount for the heterogeneity of oxide surface sitesand the formation of ternary complexes and/or solidphases that do not exist in single-solute systems.
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Ali, M. A. and Dzombak, D. A.: 1996, Environ. Sci. Technol. 30, 1061.
Anderson, M. A., Ferguson, J. F. and Gavis, J.: 1976, J. Colloid Interface Sci. 54, 391.
Aoki, T. and Munemori, M.: 1982, Water Res. 16, 793.
Azizian, M. F. and Nelson, P. O.: 1993, Iranian J. Sci. Technol. 17, 81.
Azizian, M. F. and Nelson, P. O.: 1997, 'Lead Adsorption, Chemically-Enhanced Desorption, and Equilibrium Modeling in an Iron-Oxide-Coated Sand and Synthetic Groundwater System', in E. A. Jenne (ed.), Adsorption of Metals by Geomedia, American Chemical Society Symposium Series, chapter 6, pp. 165–180.
Balistrieri, L. S. and Chao, T. T.: 1990, Geochimica et Cosmochimica Acta 54, 739.
Bates, E. R., Dean, P. V. and Klich, I.: 1992, J. Air Waste Manage. Assoc. 42, 724.
Benjamin, M. M.: 1983, Environ. Sci. Technol. 17, 686.
Benjamin, M. M. and Leckie, J. O.: 1981, J. Colloid Interface Sci. 83, 410.
Benjamin, M. M. and Bloom, N. S.: 1981, 'Effects of Strong Binding Adsorbates on Adsorption of Trace Metals on Amorphous Iron Oxyhydroxide', in P. H. Tewari (ed.), Adsorption from Aqueous Solutions, Plenum, New York, pp. 41–60.
Davis, J. A. and Leckie, J. O.: 1978, J. Colloid Interface Sci. 67, 90.
Dzombak, D. A. and Morel, F. M. M.: 1990, 'Surface Complexation Modeling', Wiley-Interscience.
Edwards, M. and Benjamin, M. M.: 1989, J.W.P.C.F. 61, 1523.
Goldberg, S.: 1986, Soil Sci. Soc. Am. J. 50, 1154.
Grossl, P. R., Sparks, D. L. and Ainsworth, C. C.: 1994, Environ. Sci. Technol. 28, 1422.
Gutzman, D. W. and Langford, C.: 1993, Environ. Sci. Technol. 27, 1388.
Herbelin, A. and Westall, J. C.: 1996, 'FITEQL: A Computer Program for the Determination of Chemical Equilibrium Constants from Experimental Data Version 3.2', Department of Chemistry, Oregon State University: Corvallis, OR, Report 96-01.
Hingston, F. J., Posner, A. M. and Quick, J. P.: 1971, Faraday Soc. 52, 334.
Kooner, Z. S.: 1992, Environ. Geol. Water Sci. 20, 205.
Lai, C. H., Lo, S. L. and Lin, C. P.: 1992, Water Sci. Technol. 30, 175.
McKenzie, R. M.: 1980, Aust. J. Soil Res. 18, 61.
Mesuere, K. and Fish, W.: 1992, Environ. Sci. Technol. 26, 2365.
Papelis, C. D., Hayes, K. F. and Leckie, J. O.: 1988, 'HYDRAQL: A Program for the Computation of Chemical Equilibrium Composition of Aqueous Batch Systems Including Complexation Modeling of Ion Adsorption at the Oxide/Solution Interface', Environmental Engineering and Science, Department of Civil Engineering, Stanford University, Stanford, CA.
Pierce, M. L. and Moore, C. B.: 1982, Water Research 16, 1247.
Rai, D., Zachara, J. M., Eary, L. E., Girvin, D. C., Moore, D. A., Resch, C. T, Sass, B. M. and Schmidt, R. L.: 1986, 'Chromium Reactions in Geological Materials', Interim Report EPRI EA 5741, E.P.R.I., Palo Alto, Calif.
Rose, A. W. and Bianchi-Mosquera, G. C.: 1993, Economic Geology 88, 1226.
Stroes-Gascoyne S., Kramer, J. R. and Snodgrass, W. J.: 1986, Environ. Sci. Technol. 20, 1047.
Westall, J. C. and Hohl, H.: 1980, Advan. Colloid Interface Sci. 12, 265.
Zachara J. M., Ainsworth, C. C., Cowan, C. E. and Resch, C. T.: 1989, Soil Sci. Soc. Am. J. 53, 418.
Zachara, J. M., Girvin, D. C., Schmidt, R. L. and Resch, C. T.: 1987, Environ. Sci. Technol. 21, 589.
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Khaodhiar, S., Azizian, M.F., Osathaphan, K. et al. Copper, Chromium, and Arsenic Adsorption and Equilibrium Modeling in An Iron-Oxide-Coated Sand, Background Electrolyte System. Water, Air, & Soil Pollution 119, 105–120 (2000). https://doi.org/10.1023/A:1005109325539
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DOI: https://doi.org/10.1023/A:1005109325539