Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-10T02:47:20.307Z Has data issue: false hasContentIssue false
  • English
  • Français

Cation and Anion Sorption Capability of Organophilic Bentonite

Published online by Cambridge University Press:  10 February 2011

J. Bors ,
St. Dultz  and
B. Riebe
J. Bors
Affiliation:
Center of Radiation Protection and Radioecology, University Hannover, Herrenhäuser Str. 2, D-30419 Hannover
St. Dultz
Affiliation:
Institute of Soil Science, University Hannover, Herrenhäuser Str. 2, D-30419 Hannover
B. Riebe
Affiliation:
Center of Radiation Protection and Radioecology, University Hannover, Herrenhäuser Str. 2, D-30419 Hannover
Get access

Abstract

Sorption experiments were performed with iodide, cesium and strontium ions on MX-80 Wyoming-bentonite treated with hexadecylpyridinium (HDPy+) in amounts equivalent to 0.2 - 4.0 times the cation exchange capacity (CEC) using 125I- 134Cs+ and 85Sr2+ as tracers. In HDPy-bentonite, iodide exhibited increasing adsorption, while cesium and strontium ions showed decreasing adsorption with increasing organophilicity. It was also found that the Cs+affinity to original and HDPy-bentonite was considerably higher than that of Sr2+ ions. HDPy+ uptake in increasing concentrations resulted in a pronounced expansion of the basal spacings (d002 reflex at 2.78 nm) and in a change of the negative particle surface charge to positive values.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 506: Symposium – Scientific Basis for Nuclear Waste Management XXI , 1997 , 297
Copyright
Copyright © Materials Research Society 1998

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

REFERENCES

[1] Karlsson, F., Sci Geol., Mémorie 87, 65–73 (1990).Google Scholar
[2] Bartl, U., Czurda, K.A., Appl. Clay Sci. 6, 195–214 (1991).Google Scholar
[3] Pusch, R., Karnland, O., Swedish Nuclear Fuel and Waste Management Co. 47 p, Report SKB-90-44, ISSN 0284-3757 (1990).Google Scholar
[4] Muurinen, A., PhD thesis, Univ. Helsinki, Finnland, VTT Publications 168 (1994).Google Scholar
[5] Lieser, K.H., Steinkopff, T.H., Radiochim. Acta 46, 49–55 (1989).Google Scholar
[6] Mortland, M.M., Shaobai, S., Boyd, S.A., Clays Clay Miner. 34, 581–585 (1986).Google Scholar
[7] Mortland, M.M., Adv. Agron. 22, 75–117 (1970).Google Scholar
[8] Xu, S., Boyd, S.A., Soil Sci. Soc.Am.J. 58, 1382–1391 (1994).Google Scholar
[9] Bors, J., Radiochim. Acta 51, 139–143 (1990).Google Scholar
[10] Bors, J., Radiochim. Acta 58/59, 235–238 (1992).Google Scholar
[11] Bors, J., Gomy, A., Appl. Clay Sci. 7, 245–250 (1992).Google Scholar
[12] Bors, J., Gomy, A., Dultz, St., Radiochim. Acta 66/67, 309–313 (1994).Google Scholar
[13] Mtiller-Vonmoos, M., Kahr, G., NTB 83–12, 1–15 (1983).Google Scholar
[14] Bors, J., Erten, H., Martens, R., Radiochim. Acta 53/53, 317–325 (1991).Google Scholar
[15] Sposito, G., in The thermodynamics of soil solutions, (Oxford Clar. Press, 1981).Google Scholar
[16] Greenland, D.J., Quirk, J.P., Clay Miner. 9, 484–499 (1962).Google Scholar
[17] Bors, J., Gomy, A., Dultz, St., Radiochim. Acta (1997), in press.Google Scholar
[18] Patzko, A., Proc. 7th EUROCLAY Conf. Dresden, 827–830 (1991).Google Scholar
[19] Holz, M., Sörensen, M., Ber. Bunsenges. Phys. Chem. 96, 1441–1447 (1992).Google Scholar
[20] Lagaly, G., in Clays: Controlling the environment, edited by Churchman, G.J., Fitzpatrick, R.W., Eggleton, R.A. (Proc. 10th Int. Clay Conference, CSIRO Bookshop, East Melbourn, 1995) pp. 137–144.Google Scholar
[21] C. De la Calle, Suquet, H., in Hydrous Phyllosilicates (Exclusive of Micas), edited by Baily, S.W. (Reviews in Mineralogy 19, Washington, DC., 1988) pp.455–496.Google Scholar