From: The effect of pH and ionic strength on the adsorption of glyphosate onto ferrihydrite
FeHydr (cm−1) | GPS (cm−1) | Glyphosate adsorbed onto ferrihydrite (cm−1) | Tentative assignments | |||
---|---|---|---|---|---|---|
pH 2.0 | pH 4.0 | pH 5.0 | pH 6.0 | |||
1731b | C=O Stretching3 | |||||
1635a | Adsorbed or lattice water1, 2 | |||||
1604d | 1607d | 1605c | 1602d | C–O stretching6, 8 | ||
1556b | NH2+ deformation4 | |||||
1534d | 1528d | 1530c | 1530d | NH2+ deformation6−8 | ||
1481b | NH2+ DEFORMATION4 | |||||
1472a | Carbonate1, 2 | |||||
1444d | 1445d | 1452c | 1450d | NH2+ deformation7, 8 | ||
1432b | CH2 group4 | |||||
1420b | CO, OH group4 | |||||
1376d | 1380d | 1377c | 1382d | C–O stretching6 | ||
1345a | Carbonate1, 2 | |||||
1334b | CH2 deformation4 | |||||
1314d | 1318d | 1316c | 1320d | Carbon backbone coupled with C–O and P–O stretching6 | ||
1270d | 1268d | 1269c | 1268d | PO3H− group (P=O)4 | ||
1267b | PO3H− group (P=O)4 | |||||
1242b | CH2 group4 | |||||
1220b | P–OH4 | |||||
1200b | CO, OH group4 | |||||
1119a | 1123a | 1122a | 1121a | P–O stretching6, 7 | ||
1088b | PO3Stretching3, 4 | |||||
1077b | P–O-stretching, PO2(OH-) group5 | |||||
1076a | Carbonate1, 2 | |||||
1049a | 1049a | 1048a | 1048a | CCNC skeletal vibration7 | ||
1030b | CCNC skeletal vibration4 | |||||
987a | 981a | 983a | 980a | P-OFe stretching6 | ||
978b | Symmetric stretching P–O3, 5, CH2 group4 | |||||
909b | Stretching P–O5, CH2 deformation4, CCNC skeletal vibration4 | |||||
896a | Carbonate1, 2 | |||||
864b | COH deformation4 | |||||
828b | POH deformation4 |