State Water Resources Research Institute Program
Project ID: 2006FL143B
Title: Evaluation of the Geochemical and Microbial Processes Controlling Arsenic Mobilization during Artificial Recharge (AR) and Aquifer Storage and Recovery (ASR)
Project Type: Research
Start Date: 3/01/2009
End Date: 2/28/2010
Congressional District: 6
Focus Categories: Hydrogeochemistry, Hydrology, Water Supply
Keywords: arsenic, ASR, water supply, geochemistry
Principal Investigator: Annable, Mike
Federal Funds: $ 16,000
Non-Federal Matching Funds: $ 32,000
Abstract: Due the growing demand on water resources within the State of Florida, alternative water supply and water storage technologies are becoming increasingly attractive to municipalities. Alternative water supply techniques such as Aquifer Storage and Recovery (ASR) and Artificial Recharge (AR) have the potential to provide much of the seasonal or long-term storage needed for many municipalities within areas of increased water demand. However, as with any engineered water supply process, these facilities must meet stringent Federal and State regulations to insure the protection of human health and the health of the environment.
Recently, facilities in southwest Florida utilizing the Suwannee Limestone of the Upper Floridan Aquifer for ASR have reported arsenic concentrations in recovered water at levels greater than 112 µg/L (Arthur et al., 2002). On January 23, 2006 the Maximum Contaminant Level for arsenic was lowered from 50 µg/L to 10 µg/L (FDEP: Chapter 62-550 F.A.C., Table 1). The mobilization of arsenic above the MCL has, therefore, become the primary regulatory issue restricting the development of these alternative water supply facilities.
This application presents a scope of work for conducting research that will further our understanding of the geochemical and microbial processes that control the mobilization of arsenic during artificial recharge. Additionally, this research will benefit our understanding of the fate and transport of arsenic mobilized during artificial recharge.