Hostname: page-component-6587cd75c8-4pd2k Total loading time: 0 Render date: 2025-04-24T03:23:38.766Z Has data issue: false hasContentIssue false
  • English
  • Français

Iodide, caesium and strontium adsorption by organophilic vermiculite

Published online by Cambridge University Press:  09 July 2018

J. Bors ,
A. Gorny  and
S. Dultz
J. Bors
Affiliation:
Centre of Radiation Protection and Radioecology, Hannover University, Herrenhäuser Str. 2, D-30419 Hannover, Germany
A. Gorny
Affiliation:
Dahlemer Str. 4, D-30982 Pattensen, Germany
S. Dultz
Affiliation:
Institute of Soil Science, Hannover University, Herrenhäuser Str. 2, D-30419 Hannover, Germany
Get access Rights & Permissions [Opens in a new window]

Abstract

Distribution coefficients and isotherms for the adsorption of radioiodide, caesium and strontium ions (125I−, 134Cs+ and 85Sr2+) were determined in untreated vermiculite and in vermiculite treated with the chloride salt of hexadecylpyridinium (HDPy+). Experimental data reveal that some of the alkylammonium ions were incorporated as HDPyCl ion pairs into the vermiculite. The fraction of ion pairs adsorbed is reflected by an increase in distribution coefficients with increasing saturation levels. Consequently, a considerable part of the iodide adsorption could be attributed to an anion exchange process. At smaller amounts of Cs+ and Sr2+ adsorbed, distribution coefficients of the modified clay mineral are significantly reduced in comparison with the original material. These differences are less pronounced when greater amounts of cations are adsorbed. Generally, larger distribution coefficients were found for the Cs+ compared with the Sr2+ ion in the untreated and modified samples.

Type
Research Article
Information
Clay Minerals , Volume 32 , Issue 1 , March 1997 , pp. 21 - 28
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1997

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.)

Article purchase

Temporarily unavailable

References

Baeyens, B. & Bradbury, M.H. (1995) A quantitative mechanistic description of Ni, Zn and Ca sorption on Na-montmorillonite. PSI-Bericht Nr. 95-10, Würenlingen and Villigen, Switzerland.Google Scholar
Bors, J. (1990) Sorption of radioiodine in organo-clays and soils. Radiochim. Ada, 51, 139–143.Google Scholar
Bors, J. (1992) Sorption and desorption of radioiodine on organo-clays. Radiochim. Acta, 58/59, 235–238.Google Scholar
Bors, J. & Gorny, A. (1992) Studies on the interactions of HDPy-vermiculite with radioiodine. Appl. Clay Sci. 7, 245–250.Google Scholar
Bors, J., Gorny, A. & Dultz, S. (1995) Sorption of radioiodide on different particle size fractions of hexadecylpyridinium-clays. Proc. 10th Int. Clay Conf. Adelaide, 74-78.Google Scholar
Graf, v. Reichenbach, H. (1973) Exchange equilibria of interlayer cations in different particle size fractions of biotite and phlogopite. Proc. Int. Clay Conf. Madrid, 457-466.Google Scholar
Greenland, D.J. (1965) Interaction between clays and organic compounds in soils. Pt. 2. Adsorption of soil organic compounds and its effect on soil properties. Soils Fen. 28, 521–532.Google Scholar
Greenland, D.J. & Quirk, J.P. (1962) Adsorption of 1-nalkyl- pyridinium bromides by montmorillonite. Clay Miner. 9, 484–499.Google Scholar
Holz, M. & Sorensen, M. (1992) Direct detection of an attractive interaction between anions and hydrophobically hydrated unpolar groups. Ber. Bunsenges. Phys. Chem. 96, 1441–1447.Google Scholar
Jaynes, W.F. & Boyd, S.A. (1991) Clay mineral type and organic compound sorption by hexadecyltrimethylammonium- exchanged clays. Soil Sci. Soc. Am. J. 55, 43–48.Google Scholar
Kim, J.L. & Lang, H. (1983) Standardization of the batch experiment for the migration study of radionuclides in the geologic media. In: Proc. of the U.S. /FRG Bilateral Workshop Berlin, Munich, (Maas, K.E. & Huf, A., editors) Hahn-Meitner Institut fur Kernforschung, Berlin.Google Scholar
Lagaly, G. (1981) Characterization of clays by organic compounds. Clay Miner. 16, 1–21.Google Scholar
Lagaly, G. (1982) Layer charge heterogeneity in vermiculite. Clays Clay Miner. 30, 215–222.Google Scholar
Lagaly, G. (1995) Surface and interlayer reactions: bentonites as adsorbents. Proc. 10th Int. Clay Conf. Adelaide, 137-144.Google Scholar
Leinweber, P., Reuter, G. & Brozio, K. (1993) Cation exchange capacities of organo-mineral particle size fractions in soils from long term experiments. J. Soil Sci. 44, 111–119.Google Scholar
Lieser, K.H. & Steinkopff, T.H. (1989) Chemistry of radioactive iodine in the hydrosphere and in the geosphere. Radiochim. Acta, 46, 49–55.Google Scholar
Mortland, M.M. (1970) Clay-organic complexes and interactions. Adv. Agron. 22 , 75-117.Google Scholar
Mortland, M. M., Shaobai, S. & Boyd, S.A. (1986) Clayorganic complexes as adsorbents for phenol and chlorophenols. Clays Clay Miner. 34, 581–585.Google Scholar
Patzko, A. (1991) Ion exchange and molecular adsorption of a cation active surfactant on montmoriUonite. Proc. 7th Euroclay Conf. Dresden, 827-830.Google Scholar
Pesci, N. (1994) Einfluβ des Sr/K-Austausches auf die Struktur aufweitbarer Schichtsilikate. PhD thesis, Univ. Hannover, Germany.Google Scholar
Rausell-Colom, J.A. & Serratosa, J.M. (1987) Reactions of clays with organic substances. Pp. 371–422 in: Chemistry of Clays and Clay Minerals (Newman, A.C.D., editor) Mineralogical Society, London.Google Scholar
Theng, B.K.G. (1974) The Chemistry of Clay-Organic Reactions. Hilger, London.Google Scholar
Weiss, A. (1963) Mica-type layer silicates with alkylammonium ions. Clays Clay Miner., Monogr. No. 12, 10, 191–223.Google Scholar
Xu, S. & Boyd, S.T.A. (1994) Cation exchange chemistry of hexadecyltrimethylammonium in a subsoil containing vermiculite. Soil Sci. Soc Am. J. 58, 1382–1391.Google Scholar