Table S1 Peak assignment for ATR-FTIR spectra of unreacted NOM and NOM sorbed to minerals. Peak position (cm-1) Assignment Reference Heckman et al. (2011) and references C=O stretch of amides 1660−1642 therein Heckman et al. (2011), Chen et al. Asymmetric COO- stretch 1592−1582 (2014), and references therein Heckman et al. (2011) and references 1456 CH2 scissoring therein Heckman et al. (2011), Chen et al. Symmetric COO- stretch (2014), Chorover and Amistadi (2001), 1414−1404 and references therein Chen et al. (2014), and references 1390 stretch COO−metal therein stretch of polysaccharides, OH deformation of Heckman et al. (2011), Artz et al. C−O 1265−1264 COOH, stretching of phenolic OH (2008), and references therein C−O Chen et al. (2014), and references 1120 stretch of polysaccharides C−O therein Heckman et al. (2011), Chen et al. stretch of polysaccharides 1051−1041 C−O (2014), and references therein
Table S1 Peak assignment for ATR-FTIR spectra of unreacted NOM and NOM sorbed to minerals. Peak position (cm-1) Assignment Reference 1660−1642 C=O stretch of amides Heckman et al. (2011) and references therein 1592−1582 Asymmetric COO- stretch Heckman et al. (2011), Chen et al. (2014), and references therein 1456 CH2 scissoring Heckman et al. (2011) and references therein 1414−1404 Symmetric COO- stretch Heckman et al. (2011), Chen et al. (2014), Chorover and Amistadi (2001), and references therein 1390 COO−metal stretch Chen et al. (2014), and references therein 1265−1264 C−O stretch of polysaccharides, OH deformation of COOH, C−O stretching of phenolic OH Heckman et al. (2011), Artz et al. (2008), and references therein 1120 C−O stretch of polysaccharides Chen et al. (2014), and references therein 1051−1041 C−O stretch of polysaccharides Heckman et al. (2011), Chen et al. (2014), and references therein
12932_2018_51_MOESM1_ESM.docx