Adsorption and desorption of phosphate on limestone in experiments simulating seawater intrusion
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Material Information

Title:
Adsorption and desorption of phosphate on limestone in experiments simulating seawater intrusion
Series Title:
Applied Geochemistry
Creator:
Price, René M.
Savabi, M. Reza
Jolicoeur, Jean L.
Roy, Srikumar
Publisher:
Elsevier
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Phosphates -- Florida -- Key Largo
Adsorption (Biology) -- Florida -- Key Largo
Saltwater encroachment -- Florida -- Key Largo
Aquifers -- Florida -- Key Largo
Genre:
article
serial ( sobekcm )
Spatial Coverage:
Key Largo (Fla.)
Coordinates:
25.1167 x -80.4667

Notes

Abstract:
This study investigates the potential release of from carbonate aquifers exposed to seawater intrusion. Adsorption and desorption of in the presence of deionized water (DIW) and seawater were conducted on a large block of Pleistocene age limestone to simulate the effects of seawater intrusion into a coastal carbonate aquifer at the laboratory scale. The limestone showed strong adsorption of in DIW, while adsorption was significantly less in the presence of seawater. Dissolution of CaCO3 was found to prevent adsorption at salinities less than 30 psu. Adsorption of was limited at higher salinities (30–33 psu), due to competition with ions for adsorption sites. At a salinity3 precipitated. Concentrations of between 2 and 5 μmol/L were released by desorption when the limestone was exposed to seawater. The results of this study suggest that as seawater intrudes into an originally freshwater coastal aquifer, adsorbed may be released into the groundwater. Consequently, adsorbed is expected to be released from coastal carbonate aquifers world-wide as sea level continues to rise exposing more of the freshwater aquifer to seawater.
Citation/Reference:
Price, R.M., M.R. Savabi, J.L. Jolicoeur, S. Roy. 2010. Adsorption and desorption of phosphate on limestone in experiments simulating seawater intrusion. Applied Geochemistry 25(7): 1085-1091.

Record Information

Source Institution:
Florida International University
Rights Management:
Please contact the owning institution for licensing and permissions. It is the users responsibility to ensure use does not violate any third party rights.
Resource Identifier:
FI14082536