Abstract
The water-rock interactions following an artificial recharge of effluents into a calcareous sandstone aquifer were studied in the Soil Aquifer Treatment (SAT) system of the Shafdan sewage reclamation plant, Israel, and in laboratory column experiments. The Shafdan SAT system is based on rapid infiltration of secondary effluents into the Israeli Coastal Aquifer and their recovery, for reuse in irrigation, after a residence time of a few months within the aquifer. A set of laboratory column experiments was designed to simulate the geochemical evolution of the effluents during their flow in the aquifer. Both, experimental and field observations indicate that the main water-rock interactions altering the chemical composition of cations in the effluents are cation exchange and CaCO3 dissolution. The initial cation exchange includes massive adsorption of Na+, K+ and Mg2+ and desorption of Ca2+. CaCO3 dissolution caused constant increase of the Ca2+ concentrations in the groundwater by 1–2 meq⋅L-1.
Original language | English |
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Title of host publication | Water-Rock Interaction |
Publisher | CRC Press |
Pages | 249-252 |
Number of pages | 4 |
ISBN (Electronic) | 9781439862995 |
ISBN (Print) | 9780415604260 |
State | Published - 1 Jan 2010 |
Bibliographical note
Publisher Copyright:© 2010 Taylor & Francis Group, London.