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. 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. (2007b), with permission from the American Institute of Physics; copyright 2007. |