Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-26T07:57:57.539Z Has data issue: false hasContentIssue false
  • English
  • Français

Sorptive capacity of montmorillonite for hydroxy-Cr polymers and the mode of Cr complexation

Published online by Cambridge University Press:  09 July 2018

W. E. Dubbin  and
Tee Boon Goh
W. E. Dubbin
Affiliation:
Department of Soil Science, University of Manitoba, Winnipeg, ManitobaCanada
Tee Boon Goh
Affiliation:
Department of Soil Science, University of Manitoba, Winnipeg, ManitobaCanada
Get access Rights & Permissions [Opens in a new window]

Abstract

Separate montmorillonite suspensions were treated with CrCl3 to give seven Cr(III) concentrations. Each suspension was then titrated with 0.1 N NaOH to give a NaOH/Cr3+ molar ratio of 2.5. Montmorillonite was an effective sorbent for hydroxy-Cr species up to 1200 cmol(+)/kg; above that concentration, sorption continued, though less efficiently. However, N2-BET specific surfaces and cation exchange capacity measurements indicated that the montmorillonite could sorb significantly more than 1200 cmol(+)/kg. There was virtually no exchangeable Cr in any of the clays, suggesting that this element was covalently bonded to the siloxane surface. Infrared spectroscopy revealed a vibration at 1015–1020 cm–1 in the Cr clays which was not present in the control. This new absorption band was attributed to an attenuation of the Si–O a11 vibration caused by inner-sphere complexation of the interlayer Cr with the siloxane oxygen. Because Cr was strongly held and efficiently sorbed, montmorillonite was shown to be an effective sorbent for hydroxy-Cr polymers.

Type
Research Article
Information
Clay Minerals , Volume 30 , Issue 3 , September 1995 , pp. 175 - 185
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1995

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Asher, L.E. & Bar-Yosef, B. (1982) Effects of pyropho-sphate, EDTA, and DTPA on zinc sorption by montmorillonite. Soil Sci. Soc. Am. J. 46, 271–276.Google Scholar
Blatter, C.L. (1973) Hg–complex intergrades in smectite. Clays Clay Miner. 21, 261–263.CrossRefGoogle Scholar
Boyo, S.A., Mortland, M.M. & Chiou, C.T. (1988) Sorption characteristics of organic compounds on hexadecyltrimethylammonium-smectite. Soil Sci. Soc. Am. J. 52, 652–657.Google Scholar
Bmndley, G.W. & Yamanaka, S. (1979) A study of hydroxy-chromium montmorillonites and the form of the hydroxy-chromium polymers. Am. Miner. 64, 830–835.Google Scholar
Carr, R.M. (1985) Hydration states of interlamellar chromium ions in montmorillonite. Clays Clay Miner. 33, 357–361.Google Scholar
Carter, D.L., Mortland, M.M. & Kemper, W.D. (1986) Specific surface. Pp. 413—423 in: Methods of Soil Analysis, Part 1, 2nd ed., (Klute, A., editor). Agronomy Society of America and Soil Science Society of America, Madison, Wisconsin.Google Scholar
Cheslock-Fitzgerald, M.M. (1990) Trivalent and hex-avalent chromium, their reactions with minerals and potential phytotoxicity in soils. MSc thesis, Univ. Manitoba, Canada.Google Scholar
Cotton, F.A. & Wilkinson, G. (1988) Advanced Inorganic Chemistry: 5th ed., Wiley-Interscience, New York, 1455 pp.Google Scholar
Drljaca, A., Anderson, J.R., Spiccia, L. & Turney, T.W. (1992) Intercalation of montmorillonite with individual chromium (III) hydrolytic oligomers. Inorg. Chem. 31, 4894–4897.Google Scholar
Dubbin, W.E., Goh, T.B., Oscarson, D.W. & Hawthorne, F.C. (1994) Properties of hydroxy-A1 and -Cr interlayers in montmorillonite. Clays Clay Miner. 42, 331–336.Google Scholar
Egozy, Y. (1980) Adsorption of cadmium and cobalt on montmorillonite as a function of solution composition. Clays Clay Miner. 28, 311—317.Google Scholar
Farmer, V.C. (1974) The layer silicates. Pp. 331–363 in: The Infrared Spectra of Minerals, (Farmer, V.C., editor). Monograph No. 4, Mineralogical Society, London.Google Scholar
Griffen, R.A. & AU, A.K. (1977) Lead adsorption by montmorillonite using a competitive Langmuir equation. Soil Set Soc. Am. J. 41, 880–882.Google Scholar
Inskeep, W.P. & Baham, J. (1983) Competitive com-plexation of Cd(II) and Cu(II) by water-soluble organic ligands and Na-montmorillonite. Soil Sci. Soc. Am. J. 47, 1109–1115.Google Scholar
Jaynes, W.F. & Boyd, S.A. (1991) Hydrophobicity of siloxane surfaces in smectites as revealed by aromatic hydrocarbon adsorption from water. Clays Clay Miner. 39, 428–436.CrossRefGoogle Scholar
Jensen, W.B. (1978) The Lewis acid-base definitions: A status report. Chem. Rev. 78, 1–22.CrossRefGoogle Scholar
Lester, J.N. (1987) Heavy metals in wastewater and sludge treatment processes. Vol. I. Sources, Analysis, and Legislation. CRC Press, Boca Raton, FI.Google Scholar
Misono, M., Ochiai, E., Saito, Y. & Yoneda, Y. (1967) A new dual parameter scale for the strength of Lewis acids and bases with the evaluation of their softness. J. Inorg. Nucl. Chem. 29, 2685–2691.CrossRefGoogle Scholar
Rengasamy, P. & Oades, J.M. (1978) Interaction of monomeric and polymeric species of metal ions with clay surfaces. III. Alumininm(III) and chromium(III). Aust. J. Soil Res. 16, 53–66.Google Scholar
Rlch, C.I. (1961) Calcium determination for cation exchange capacity measurements. Soil Sci. 92, 226–231.Google Scholar
Sposito, G. (1984) The Surface Chemistry of Soils, Oxford Univ. Press, Oxford.Google Scholar
Van Bladel, R., Halen, H. & Cloos, P. (1993) Calcium-zinc and calcium-cadmium exchange in suspensions of various types of clays. Clay Miner. 28, 33—38.Google Scholar
Weast, R.C. (1976) CRC Handbook of Chemistry and Physics, 57th edition. CRC Press, Inc. Boca Raton, FI.Google Scholar