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. Author manuscript; available in PMC: 2022 Jan 15.
Published in final edited form as: Atmos Environ (1994). 2020 Oct 14;245:117988. doi: 10.1016/j.atmosenv.2020.117988

Figure 2.

Figure 2.

A. Iron K-edge XANES and EXAFS of ambient PM2.5 samples and their linear combination (LC) best fits (in red); see Fig. S1 for fit deconvolutions with individual reference spectra. B. Relative percentages of individual components determined from LC fits of XANES and EXAFS with reference spectra (normalized to 100%). Numerical fit results are given in Table 2. Abbreviations: Fer - ferrihydrite (am-Fe(OH)3); Hem - hematite (α-Fe2O3); Mag - magnetite (Fe3O4); Il/Sm – illite/smectite (Clay Minerals Society IMt-1); see Table S2 for details of reference compound spectra.