Fig. 3
From: Impacts of hydrous manganese oxide on the retention and lability of dissolved organic matter
Carbon 1s NEXAFS spectra collected at a synchrotron-based scanning transmission X-ray microprobe for the unreacted DOM, HMO with initial C:Mn molar ratios of 0.46 and 2.5, and goethite with initial C:Fe molar ratios of 0.23 and 3.1. The aromatic (C=C), phenolic (C=C–O), and carboxylic (C=O) C peaks locations are shown for reference