Table 2 ATR-FTIR peaks identification for four biofouling species and associated bio-geochemical degradation areas on celadon glaze
Frequency (cm−1) | Peak assignment | Chemical origin | References |
|---|---|---|---|
3538–3328 | ν(N-H) of Amide A (proteins) | Proteinaxeous residues | |
3290–3257 | ν(O-H) form H2O | Adsorbed water | |
2922–2917 | νas(C-H) in methylene groups -CH2 | Organic bioflims | |
2852–2849 | νs(C-H) in methyl groups -CH3 | Microbial lipids | |
1686–1619 | ν(C=O) of Amide I | Proteins/enzymes | |
1558–1538 | δ(N-H)+ν(C-N) of Amide II | Degraded collagen | |
~1466, ~1457 | δ(C-H) (-CH2) scissoring | Aliphatic chains | |
1418–1402 | ν3(CO32−), νas | Calcite deposits | |
~1350, ~1348 | δ(N-H)+ν(C-N) of Amide III | Fibrous proteins | |
1107–1003 | ν(C-O) of polysaccharides; ν(P-O-C) in EPS ν(Si-O) | EPS and Silicon | |
~938, ~941 | νs(PO43−) | Biogenic phosphates | |
872–870 | γ(CO32−) out-of-plane bend, ν2 | Aragonite | |
796–772 | νs(Si-O-Si) of silicate | Silicate glaze matrix | |
685–602 | ν(S-S) in disulfides; ν(Fe-S) in iron sulfides | Bio-geochemical degradation products | |
532–531 | ν(M-O) metal-oxygen bonds | Bio-geochemical degradation products | |
455–420 | ν(S2−) sulfide lattice vibrations | Sulfide minerals | |
416–407 | ν(Fe(II)-S) metal-sulfur stretching | Iron Sulfide minerals |
