Title Page
Contents
Abstract 8
1. Introduction 9
2. Experimental section 11
2.1. Instrumentation 11
2.2. Materials 11
2.3. Sample preparations 11
2.4. Experimental measurements 12
3. Results & Discussions 13
3.1. Results 13
3.2. Discussions 20
4. Conclusion 21
Reference 22
Supporting Information 26
Figure 1. Prepared Nile red PS sample. 13
Figure 2. Factors affecting photobleaching rate. 14
Figure 3. Commercial PS sample. 15
Figure 4. Photobleaching of pink PS from plastic spoon. 16
Figure 5. Photobleaching of blue PS from ice cream lid. 18
Figure 6. Photobleaching of microplastics in wastewater. 19
Figure S1. Raman spectra of PS particles corresponding to each point in figure 2. 26
Figure S2. Raman spectra measured at different wavelengths. (a) Nile Red dyed PS / 633 nm, (b) Pink PS / 633 nm, (c) Blue PS / 532 nm 27
Figure S3. Wastewater from plastic recycling facility. (a) Mechanical plastic recycling process, (b) Before pretreatment, (b) Sieving, (c) After pretreatment 27