The Impact of Dissolved Organic Matter on Photodegradation Rates, Byproduct Formations, and Degradation Pathways for Two Neonicotinoid Insecticides in Simulated River Waters

The following are available online at https://www.mdpi.com/article/10.3390/su16031181/s1, Table S1. Experimental design for imidacloprid and thiamethoxam study; Table S2. Parameters for LC-MS/MS Analysis; Table S3. Water quality parameters in various water experiments in light experiments; Table S4. Significance grouping for MIS DOM photodegradation concentration by time (h); Table S5. Significance grouping for MIS DOM photodegradation concentration by treatment (e.g., TEMPOL, NaN₃, and IPA); Table S6. Significance grouping for MIS DOM photodegradation removal rate by time (h); Table S7. Significance grouping for MIS DOM photodegradation removal rate by treatment (e.g., TEMPOL, NaN₃, and IPA); Table S8. Significance grouping for SUW DOM photodegradation concentration by time (h); Table S9. Significance grouping for SUW DOM photodegradation concentration by treatment (e.g., TEMPOL, NaN₃, and IPA); Table S10. Significance grouping for SUW DOM photodegradation removal rate by time (h); Table S11. Significance grouping for SUW DOM photodegradation removal rate by treatment (e.g., TEMPOL, NaN₃, and IPA); Table S12. Significance grouping for NP photodegradation concentration by time (h); Table S13. Significance grouping for NP photodegradation concentration by treatment (e.g., TEMPOL, NaN₃, and IPA); Table S14. Significance grouping for NP photodegradation removal rate by time (h); Table S15. Significance grouping for NP photodegradation removal rate by treatment (e.g., TEMPOL, NaN₃, and IPA); Table S16. Effects of isopropanol, NaN₃, and TEMPOL on the photodegradation kinetics of imidacloprid and thiamethoxam in simulated Mississippi DOM; Table S17. Effects of isopropanol, NaN₃, and TEMPOL on the photodegradation kinetics of imidacloprid and thiamethoxam in simulated Suwanee DOM; Table S18. Effects of isopropanol, NaN₃, and TEMPOL on the photodegradation kinetics of imidacloprid and thiamethoxam in simulated Nanopure water; Table S19. Significance grouping for MIS DOM byproduct concentration by treatment (e.g., TEMPOL, NaN₃, and IPA); Table S20. Significance grouping for SUW DOM byproduct concentration by treatment (e.g., TEMPOL, NaN₃, and IPA); Table S21. Significance grouping for Nanopure byproduct concentration by treatment (e.g., TEMPOL, NaN₃, and IPA); Figure S1. Phototransformation of parent and byproducts formed in Mississippi river DOM under simulated light for (A) thiamethoxam with TEMPOL (n = 3), (B) thiamethoxam with NaN₃ (n = 3), (C) thiamethoxam with IPA (n = 3), and (D) thiamethoxam without scavenging agents (n = 9); Figure S2. Phototransformation of parent and byproducts formed in Suwannee River DOM under simulated light for (A) thiamethoxam with TEMPOL (n = 3), (B) thiamethoxam with NaN₃ (n = 3), (C) thiamethoxam with IPA (n = 3), and (D) thiamethoxam without scavenging agents (n = 9); Figure S3. Phototransformation of parent and byproducts formed in Nanopure water under simulated light for (A) thiamethoxam with TEMPOL (n = 3), (B) thiamethoxam with NaN₃ (n = 3), (C) thiamethoxam with IPA (n = 3), and (D) thiamethoxam without scavenging agents (n = 9); Equations (S1)–(S12).