Research Article
Effects of Four Kinds of Oxide Nanoparticles on Proteins in Extracellular Polymeric Substances of Sludge
Table 3
Effects of NPs on EPS protein secondary structures in different EPS fractions.
| | EPS fractions | NPs | Secondary structures (%) | | Aggregated strands | β-Sheet | Random coli | α-Helix | 3-turn helix | Antiparallel β-sheet/aggregated strands | | 1610-1625 cm-1 | 1630-1640 cm-1 | 1640-1645 cm-1 | 1648-1657 cm-1 | 1659-1972 cm-1 | 1680-1695 cm-1 |
| | SEPS | Blank | 14.58% | 17.70% | 16.86% | 17.74% | 15.75% | 17.37% | | Al2O3 | 20.25% | 17.85% | 9.66% | 17.55% | 18.59% | 16.10% | | Fe3O4 | 19.32% | 17.19% | 12.06% | 21.08% | 18.18% | 12.17% | | ZnO | 17.83% | 13.34% | 13.84% | 15.14% | 24.48% | 15.37% | | TiO2 | 16.67% | 21.04% | 11.48% | 12.46% | 25.77% | 12.59% |
| | LB-EPS | Blank | 13.31% | 22.52% | 21.75% | 19.49% | 12.50% | 10.42% | | Al2O3 | 16.71% | 22.56% | 21.72% | 25.06% | 25.63% | 12.08% | | Fe3O4 | 19.30% | 18.13% | 9.74% | 24.58% | 12.67% | 13.08% | | ZnO | 16.18% | 14.63% | 13.64% | 15.42% | 25.14% | 11.89% | | TiO2 | 20.02% | 23.26% | 9.59% | 15.96% | 16.01% | 12.09% |
| | TB-EPS | Blank | 15.54% | 15.87% | 15.65% | 17.1% | 26.00% | 9.79% | | Al2O3 | 15.26% | 20.36% | 11.01% | 19.15% | 18.41% | 12.13% | | Fe3O4 | 11.40% | 23.67% | 11.40% | 26.68% | 14.30% | 10.53% | | ZnO | 14.85% | 13.11% | 14.25% | 16.07% | 27.91% | 13.80% | | TiO2 | 10.26% | 14.27% | 13.84% | 15.24% | 13.05% | 5.71% |
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