Radical chemistry, degradation mechanism and toxicity evolution of BPA in the UV/chlorine and UV/H2O2
Само за регистроване кориснике
2023
Аутори
Cao, YingYao, Jun
Šolević Knudsen, Tatjana
Pang, Wancheng
Zhu, Junjie
Liu, Bang
Li, Hao
Li, Miaomiao
Su, Jianchao
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
UV-assisted advanced oxidation processes (AOPs) are widely used and studied in degradation of bisphenol A (BPA). However, detailed information on their radical chemistry and degradation mechanisms is still lacking. In this study, degradation of BPA was comparatively evaluated to investigate the radical mechanisms, products and the toxicity variation in UV/chlorine and UV/H2O2 processes. In comparison with UV/H2O2, UV/chlorine had a higher BPA degradation efficiency and higher pH-dependency due to chlorination and the synergy of •OH and RCS. The •OH and Cl• played a pivotal role as the primary radicals in BPA degradation by UV/chlorine process at all pH investigated (6–8). The relative contributions of the secondary radicals ClO• gradually decreased with a variation of pH from 6 to 8 in this process. Presence of HCO3─ and HA inhibited BPA degradation to different extents in UV/chlorine process, while the effect of Cl─ could be neglected. According to the identified transformation produc...ts, chlorination (major), hydroxylation and breakage of the isopropylidene chain were BPA decomposition pathways in the UV/chlorine system. In the UV/H2O2 system, only hydroxylation (major) and breakage of the isopropylidene chain occurred. The toxicity analysis, based on the proposed degradation pathways, indicated that the generation of chlorinated products in the UV/chlorine system led to a higher toxicity of the resulting mixture than in the UV/H2O2 system. Although UV/chlorine has an excellent BPA degradation effect and it is cost-effective, the possible environmental risk should be carefully considered when UV/chlorine system is used to remove BPA in real waters.
Кључне речи:
Bisphenol A / UV/Chlorine / Reactive species / Degradation pathway / Toxicity analysisИзвор:
Chemosphere, 2023, 312, 137169-Издавач:
- Elsevier BV
Финансирање / пројекти:
- National Science Foundation of China (42230716)
- National Science Foundation of China (41720104007)
- Major National R & D Projects for Chinese Ministry of Science and Technology (2019YFC1803500)
- 111 Project (B21017)
- 2021 Graduate Innovation Fund Project of China University of Geosciences, Beijing (YB2021YC016)
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200026 (Универзитет у Београду, Институт за хемију, технологију и металургију - ИХТМ) (RS-MESTD-inst-2020-200026)
- International Joint Scientific and Technical Collaboration between the People's Republic of China and the Republic of Serbia as part of the Project Number 4–18
DOI: 10.1016/j.chemosphere.2022.137169
ISSN: 0045-6535
PubMed: 36402353
WoS: 000903529800004
Scopus: 2-s2.0-85142317899
Институција/група
IHTMTY - JOUR AU - Cao, Ying AU - Yao, Jun AU - Šolević Knudsen, Tatjana AU - Pang, Wancheng AU - Zhu, Junjie AU - Liu, Bang AU - Li, Hao AU - Li, Miaomiao AU - Su, Jianchao PY - 2023 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/5580 AB - UV-assisted advanced oxidation processes (AOPs) are widely used and studied in degradation of bisphenol A (BPA). However, detailed information on their radical chemistry and degradation mechanisms is still lacking. In this study, degradation of BPA was comparatively evaluated to investigate the radical mechanisms, products and the toxicity variation in UV/chlorine and UV/H2O2 processes. In comparison with UV/H2O2, UV/chlorine had a higher BPA degradation efficiency and higher pH-dependency due to chlorination and the synergy of •OH and RCS. The •OH and Cl• played a pivotal role as the primary radicals in BPA degradation by UV/chlorine process at all pH investigated (6–8). The relative contributions of the secondary radicals ClO• gradually decreased with a variation of pH from 6 to 8 in this process. Presence of HCO3─ and HA inhibited BPA degradation to different extents in UV/chlorine process, while the effect of Cl─ could be neglected. According to the identified transformation products, chlorination (major), hydroxylation and breakage of the isopropylidene chain were BPA decomposition pathways in the UV/chlorine system. In the UV/H2O2 system, only hydroxylation (major) and breakage of the isopropylidene chain occurred. The toxicity analysis, based on the proposed degradation pathways, indicated that the generation of chlorinated products in the UV/chlorine system led to a higher toxicity of the resulting mixture than in the UV/H2O2 system. Although UV/chlorine has an excellent BPA degradation effect and it is cost-effective, the possible environmental risk should be carefully considered when UV/chlorine system is used to remove BPA in real waters. PB - Elsevier BV T2 - Chemosphere T1 - Radical chemistry, degradation mechanism and toxicity evolution of BPA in the UV/chlorine and UV/H2O2 VL - 312 SP - 137169 DO - 10.1016/j.chemosphere.2022.137169 ER -
@article{ author = "Cao, Ying and Yao, Jun and Šolević Knudsen, Tatjana and Pang, Wancheng and Zhu, Junjie and Liu, Bang and Li, Hao and Li, Miaomiao and Su, Jianchao", year = "2023", abstract = "UV-assisted advanced oxidation processes (AOPs) are widely used and studied in degradation of bisphenol A (BPA). However, detailed information on their radical chemistry and degradation mechanisms is still lacking. In this study, degradation of BPA was comparatively evaluated to investigate the radical mechanisms, products and the toxicity variation in UV/chlorine and UV/H2O2 processes. In comparison with UV/H2O2, UV/chlorine had a higher BPA degradation efficiency and higher pH-dependency due to chlorination and the synergy of •OH and RCS. The •OH and Cl• played a pivotal role as the primary radicals in BPA degradation by UV/chlorine process at all pH investigated (6–8). The relative contributions of the secondary radicals ClO• gradually decreased with a variation of pH from 6 to 8 in this process. Presence of HCO3─ and HA inhibited BPA degradation to different extents in UV/chlorine process, while the effect of Cl─ could be neglected. According to the identified transformation products, chlorination (major), hydroxylation and breakage of the isopropylidene chain were BPA decomposition pathways in the UV/chlorine system. In the UV/H2O2 system, only hydroxylation (major) and breakage of the isopropylidene chain occurred. The toxicity analysis, based on the proposed degradation pathways, indicated that the generation of chlorinated products in the UV/chlorine system led to a higher toxicity of the resulting mixture than in the UV/H2O2 system. Although UV/chlorine has an excellent BPA degradation effect and it is cost-effective, the possible environmental risk should be carefully considered when UV/chlorine system is used to remove BPA in real waters.", publisher = "Elsevier BV", journal = "Chemosphere", title = "Radical chemistry, degradation mechanism and toxicity evolution of BPA in the UV/chlorine and UV/H2O2", volume = "312", pages = "137169", doi = "10.1016/j.chemosphere.2022.137169" }
Cao, Y., Yao, J., Šolević Knudsen, T., Pang, W., Zhu, J., Liu, B., Li, H., Li, M.,& Su, J.. (2023). Radical chemistry, degradation mechanism and toxicity evolution of BPA in the UV/chlorine and UV/H2O2. in Chemosphere Elsevier BV., 312, 137169. https://doi.org/10.1016/j.chemosphere.2022.137169
Cao Y, Yao J, Šolević Knudsen T, Pang W, Zhu J, Liu B, Li H, Li M, Su J. Radical chemistry, degradation mechanism and toxicity evolution of BPA in the UV/chlorine and UV/H2O2. in Chemosphere. 2023;312:137169. doi:10.1016/j.chemosphere.2022.137169 .
Cao, Ying, Yao, Jun, Šolević Knudsen, Tatjana, Pang, Wancheng, Zhu, Junjie, Liu, Bang, Li, Hao, Li, Miaomiao, Su, Jianchao, "Radical chemistry, degradation mechanism and toxicity evolution of BPA in the UV/chlorine and UV/H2O2" in Chemosphere, 312 (2023):137169, https://doi.org/10.1016/j.chemosphere.2022.137169 . .