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Groundwater geochemistry of short‐term aquifer thermal energy storage test cycles
Author(s) -
Holm Thomas R.,
Eisenreich Steven J.,
Rosenberg Heidi L.,
Holm Nancy P.
Publication year - 1987
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr023i006p01005
Subject(s) - aquifer , alkalinity , groundwater , calcite , geology , dissolved silica , environmental science , mineralogy , chemistry , dissolution , geotechnical engineering , organic chemistry
The changes in the concentrations of Ca, dissolved silica, and alkalinity of the recovery waters of four short‐term aquifer thermal energy storage test cycles with respect to the injection waters and the correlation of these concentrations with recovery water temperatures indicate that quartz and calcite dissolved during hot water storage. This hypothesis was supported by chemical equilibrium modeling and mass balance calculations. Magnesium concentrations were lower in recovery waters than in injection waters. Chemical equilibrium modeling indicated that a Mg silicate (talc) could have precipitated. Potassium concentrations correlated well with temperatures, probably because of ion exchange involving potassium feldspars in the aquifer.