A kinetic study of the CaCO3 precipitation reaction
1977; Elsevier BV; Volume: 1; Issue: 3 Linguagem: Inglês
10.1016/0378-3774(77)90004-x
ISSN1873-2283
AutoresJ. T. Gilmour, K.S. Shirk, James A. Ferguson, C. L. Griffis,
Tópico(s)Grouting, Rheology, and Soil Mechanics
ResumoIn order to develop water management practices which would minimize localized precipitation of Ca and Mg carbonates on Arkansas' rice fields, a description of the precipitation reaction was needed. Waters studied were prepared solutions which contained varying amounts of Ca(HCO3)2, Mg(HCO3)2 and/or MgCl2, and subterranean water samples collected in the field. These waters were monitored for Ca and Mg loss due to carbonate precipitation under unseeded, spontaneous conditions. The rate of Ca loss from solution was adequately described by first order kinetics where Ca was the rate determining ion. An empirical equation was developed which showed that the rate constant could be calculated from temperature and solution composition data. An evaluation of the rates of Ca and Mg loss from solution for the experimental periods studied showed that Mg losses were small when compared to Ca losses.
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