THE EXTENT OF PHOSPHORUS REDOX CHEMISTRY IN WEST CENTRAL FLORIDA WATERS: AN HPLC-ICP-MS STUDY
Thirty-two individual water samples were collected from six different bodies of freshwater in the Tampa Bay area between the months of November 2012 to March 2013. The freshwater samples collected were from river, spring and pond/swamp water locations. Two sampling sites were chosen at each location. At each site one, sample was collected from the waters surface and the second sample from the pore water. When depth was sufficient a third sample was obtained from the midpoint between the surface and pore water. Analytical results show that redox reactions of P occur in all freshwater samples collected and can successfully be identified by HPLC-ICP-MS analysis. From the limited data collected it is apparent that the amount of water circulation is related to the pH, type of phosphate and the amount of reduced P in the system. Additional samples must be collected in order to identify the processes controlling P speciation. Future samples must include pH measurements at each location and identification of bacterial communities should be considered.