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Quarterly Journal of Engineering Geology and Hydrogeology
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Quarterly Journal of Engineering Geology and Hydrogeology; 1976; v. 9; issue.1; p. 25-36;
DOI: 10.1144/GSL.QJEG.1976.009.01.02
© 1976 Geological Society of London

Article

Information on groundwater composition obtained from a laboratory study of sediment-water interaction

D. A. Spears

Department of Geology, University of Sheffield, , S1 3JD, England

The dissolution of some superficial sediments was studied experimentally to determine the sediment's influence on groundwater composition and also to check the previous findings based on analyses of the sediment and of the natural pore water from a site at Dunsforth, 21 km north-west of York. In the experiments Ca was dissolved from carbonates, Mg from dolomite and clay minerals, K and probably Na also from clay minerals and possibly feldspars. Higher concentrations of Ca, Mg and K were dissolved from unweathered sediments than from weathered, whereas the concentration of Na remained relatively constant. These conclusions are in agreement with those based on a study of the natural system and thus some of the reactions can be reproduced in the laboratory. Equilibrium was achieved relatively rapidly in the experiments. It is therefore claimed that relatively simple experimental work can provide meaningful information in studies of groundwater chemistry.




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D. A. Spears
Porewater composition in the unsaturated zone of the Chalk, with particular reference to nitrates
Quarterly Journal of Engineering Geology and Hydrogeology, 1979; 12: 97 - 105.
[Abstract] [PDF]