Hostname: page-component-76fb5796d-qxdb6 Total loading time: 0 Render date: 2024-04-27T04:26:04.528Z Has data issue: false hasContentIssue false
  • English
  • Français

Comparison of Titration Methods Used in Characterization of Bentonite

Published online by Cambridge University Press:  20 February 2017

Rostislav Adam ,
Karel Štamberg  and
Barbora Drtinová
Rostislav Adam*
Affiliation:
Department of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 115 19 Prague 1, Czech Republic
Karel Štamberg
Affiliation:
Department of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 115 19 Prague 1, Czech Republic
Barbora Drtinová
Affiliation:
Department of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 115 19 Prague 1, Czech Republic
*
*(Email: Rostislav.Adam@fjfi.cvut.cz)
Get access

Abstract

Titration of bentonite, or clay materials in general, can be carried out in two ways, namely by semi-continuous method and batch method. This study compares these two methods, and, in addition, presents the results of two different evaluation and regression procedures used for fitting of experimental titration curves and for calculation of corresponding parameters. Bentonites B75 and S65, and montmorillonite SAz-1, were chosen for this study. Regarding the semi-continuous method, the technique developed by Wanner et al. was used. As for the batch method, two-week contact time for selected solid/liquid ratio 1 g per 250 ml was used on the base of preliminary experiments. The evaluation of result obtained using the batch method with back titration correction gave more relevant data, on the other hand, with the use of this method is connected a risk of solid phase dissolution. The chemical equilibrium model (i.e. non-electrostatic), incorporated into codes (I) PHREEQC + UCODE_2005, and (II) PDNLRG.fm (code package STAMB) + software FAMULUS, was used to the evaluation of the titration curves. The codes mentioned give only slightly different resulting values in the case of batch method.

Keywords

adsorptionenvironmentwaste management
Type
Articles
Information
MRS Advances , Volume 1 , Issue 61: Scientific Basis for Nuclear Waste Management XXXIX , 2016 , pp. 4035 - 4040
Copyright
Copyright © Materials Research Society 2017 

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

Wanner, H., Albisson, Y., Karnland, O., Wieland, E., Wersin, P. and Charlet, L., Radiochimica Acta 66/67, 157 (1994).Google Scholar
Baeyens, B., Bradbury, M.H., J. Cont. Hydrol. 27, 199 (1997).CrossRefGoogle Scholar
Tournassat, C., Greneche, J.M., Tisserand, D. and Charlet, L., J. Colloid and Interface Science 273, 224 (2004).Google Scholar
Filipská, H. and Štamberg, K., Acta Polytechnica 45, 11 (2005).CrossRefGoogle Scholar
Herbelin, A.L. and Westall, J.C., FITEQL – A computer program for determination of chemical equilibrium constants from experimental data, version 3.2, Report 96–01, Corvallis, Oregon, Department of Chemistry, Oregon State University (1996).Google Scholar
Brendler, V., RES3T – Rossendorf Expert System for Surface and Sorption Thermodynamics, 2nd Release from January 24, 2006. Forschungszentrum Rossendorf e.V., Institute for Radiochemistry, Dresden, Germany.Google Scholar
Lützenkirchen, J. (Ed.), Surface Complexation Modelling. Elsevier, Amsterdam, 2006, pp. 133-170.Google Scholar
Červinka, R. and Hanuláková, D., Research Report No. 14269/2013 (in Czech), ÚJV Řež, 2013.Google Scholar