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Figure 7
Mechanistic model describing HA precipitation versus fractionation under various pH conditions and following metal cation complexation. Signatures I–III correspond to spectra in Fig. 6[link]. Note that useful C 1s-NEXAFS spectra can only be derived from flocculated material and not from dissolved HA fractions (see text for details); figure reprinted from Rothe et al. (2007bBB23), with permission from the American Institute of Physics; copyright 2007.

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