Lead Speciation and Bioavailability in Apatite-Amended Sediments

Figure 1

XANES spectra and LCF of preamendment Chopawamsic Creek sediment and the firing range source soil (Hillside Source). Plots C–E samples were collected and stored under anaerobic conditions. Plots C–E-Oxidized samples were collected under anaerobic conditions and exposed to atmospheric air for one week prior to analysis. Plot C was amended with 1.5% phosphorus, Plot D was unamended, and Plot E was amended with 3% phosphorus after the collection of these samples. LCF of the spectra are shown as red circles and Pb standards used in the fits are shown for comparison.