Research Article

Effects of Four Kinds of Oxide Nanoparticles on Proteins in Extracellular Polymeric Substances of Sludge

Figure 4

The 3D-EEMs of SEPS, LB-EPS, and TB-EPS before and after treatment with NPs: blank samples (a), Al2O3 NP-treated sludge (0.04 g/g TSS) (b), Fe3O4 NP-treated sludge (0.05 g/g TSS) (c), ZnO NP-treated sludge (0.05 g/g TSS) (d), TiO2 NP-treated sludge (0.03 g/g TSS) (e).