Water–Rock Geochemical Considerations for Aquifer Storage and Recovery: Florida Case Studies


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Water–Rock Geochemical Considerations for Aquifer Storage and Recovery: Florida Case Studies
Series Title:
Developments in Water Science
Arthur, J. D.
Dabous, A. A.
Cowart, J. B.
Publication Date:


serial ( sobekcm )


This chapter investigates the three aquifer storage and recovery (ASR) facilities in Southwest Florida to understand water–rock geochemical interactions during the ASR process. Mobilization of metals from the Floridan Aquifer System (FAS) matrix during ASR activities is apparent and is likely due to a complex interaction of geochemical processes. The chemically heterogeneous aquifer contains metal-rich phases in sufficient amounts to become mobilized by oxidation or other processes to yield concentrations in recovered waters that may exceed maximum contaminant levels (MCLs). Arsenian pyrite is among the sources of arsenic and other trace metals in the aquifer; however, preliminary sequential extraction studies and work by other researchers suggest that phases such as organics contain As and other metals. Moreover, organic material may contain uranium, which is also thought to be associated with carbonate minerals in the Suwannee Limestone. Water-quality data from more than 15 cycle tests from three ASR facilities in Southwestern Florida indicate significant mobilization of metals into stored and recovered water during ASR.
Original Version:
Developments in Water Science, Vol. 52 (2005).

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