Pb-L_III XAFS and derived spectra of model compounds and representative PM and soil.

(A) XAFS spectra. Spectra are background-subtracted, normalized, k²-weighted, and plotted in k-space. (B) Derivatives of Pb-L_III XANES spectra of model compounds. Derivatives were taken of spectra that had been background-subtracted, normalized, and k²-weighted. (C) Radial distribution functions (RDF) derived from Fourier transforms of Pb-L_III XAFS spectra of model compounds. Distances are not corrected for phase shift during photo-electron backscattering. Aqueous Pb spectra adapted from Bargar [30].