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The effect of aqueous sulphate on basaltic glass dissolution rates

Published online by Cambridge University Press:  05 July 2018

T. K. Flaathen ,
E. H. Oelkers  and
S. Gislason
T. K. Flaathen*
Affiliation:
LMTG-Université de Toulouse-CNRS-IRD-OMP, 14 Avenues Edouard Belin, 31400 Toulouse, France
E. H. Oelkers
Affiliation:
LMTG-Université de Toulouse-CNRS-IRD-OMP, 14 Avenues Edouard Belin, 31400 Toulouse, France
S. Gislason
Affiliation:
Institute of Earth Sciences, University of Iceland, Sturlugata 7, 101 Reykjavík, Iceland
*
*E-mail: [email protected]
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Abstract

Steady-state dissolution rates of basaltic glass were measured in mixed-flow reactors at 50ºC at pH 3 and 4 as a function of aqueous sulphate concentration. Dissolution rates in the presence of 0.1 moles/kg SO42- were found to be ~3 times greater than those in corresponding SO42- free solutions. This rate increase is found to be approximately consistent with that calculated using a rate equation previously proposed by Gislason and Oelkers (2003). These results suggest that the addition of sulphate to injected CO2 may facilitate CO2 sequestration in basalts by accelerating basaltic glass dissolution rates thus more rapidly releasing aqueous Ca and Mg to solution.

Keywords

basaltic glassdissolution ratesCO2 sequestrationkineticsaqueous sulphate
Type
Research Article
Information
Mineralogical Magazine , Volume 72 , Issue 1 , February 2008 , pp. 39 - 41
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2008

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References

Gislason, S.R. and Oelkers, E., (2003) Mechanism, rates, and consequences of basaltic glass dissolution; II. An experimental study of the dissolution rates of basaltic glass as a function of pH and temperature. Geochimica et Cosmochimica Acta, 67, 3817–3832.CrossRefGoogle Scholar
Gislason, S.R., Gunnlaugsson, E., Broeker, W.S., Oelkers, E.H., Matter, J.M., Stefansson, A., Arnorsson, S., Bjornsson, G., Fridriksson, T. and Lackner, K. (2007) Permanent CO2 sequestration into basalt: the Hellisheidi, Iceland project. Geophysical Research Abstracts, 9, 07153. European Geosciences Union General Assembly 2007 Vienna, Austria.Google Scholar
Matter, J.M., Takahashi, T. and Goldberg, D. (2007) Experimental evaluation of in situ CO2-water-rock reactions during CO2 injection in basaltic rocks: Implications for geological CO2 sequestration. Geochemistry Geophysics Geosystems, 8, Q02001, doi:10.1029/2006GC001427.CrossRefGoogle Scholar
McGrail, B.P., Schaef, H.T., Ho, A.M., Chien, Y.J. and Dooley, J. (2006) Potential for carbon dioxide sequestration in flood basalts. Journal of Geophysical Research, 111, B12201, doi: 10.1029/ 2005JB004169.CrossRefGoogle Scholar
Oelkers, E.H. and Gislason, S.R. (2001) The mechanism, rates and consequences of basaltic glass dissolution: I. An experimental study of the dissolution rates of basaltic glass as a function of aqueous Al, Si and oxalic acid concentration at 25°C and pH = 3 and 11. Geochimica et Cosmochimica Acta, 65, 3671–3681.Google Scholar
Parkhurst, D.L. and Appelo, C.A.J. (1999) User's guide to PHREEQC (Version 2) — A computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations. USGS-Report 99–4259.Google Scholar
Wolff-Boenisch, D., Gislason, S.R. and Oelkers, E.H. (2004) The effect of fluoride on the dissolution rates of natural glasses at pH 4 and 25°C. Geochimica et Cosmochimica Acta, 68, 4571–4582.CrossRefGoogle Scholar