Degradation of chloroquine phosphate by low-pressure ultraviolet/peroxyacetic acid: Performance, degradation pathway and mechanism studies
Peroxyacetic acid (PAA), as a potential disinfectant, can be used to drive an ultraviolet-based advanced oxidation process (UV-AOP) for water purification. In this study, low-pressure ultraviolet (LP-UV) was innovatively coupled with PAA to construct an LP-UV/PAA system for the degradation of chloro...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
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| Series: | Ecotoxicology and Environmental Safety |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651325009315 |
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| Summary: | Peroxyacetic acid (PAA), as a potential disinfectant, can be used to drive an ultraviolet-based advanced oxidation process (UV-AOP) for water purification. In this study, low-pressure ultraviolet (LP-UV) was innovatively coupled with PAA to construct an LP-UV/PAA system for the degradation of chloroquine phosphate (CQP), an antiviral drug that is widely present in the aqueous environment. The results showed that the system removed 99.89 % of CQP within 30 min, which was significantly better than single LP-UV or PAA treatment. The common natural substances in the actual water body, such as Cl−, Br− and HCO3−, etc., slightly promoted the degradation of CQP. The free radical quenching experiments confirmed that ·OH was the dominant active species in the CQP degradation process, and the secondary effects included CH3· and CH3COOO·. The system simultaneously demonstrated excellent sterilizing ability and disinfection by-product control, which indicated that it had the prospect of engineering application. This work not only deepens the theoretical understanding of the UV/PAA reaction pathway, but also provides an efficient and scalable technical solution for the treatment of CQP pollution in practical water treatment scenarios. |
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| ISSN: | 0147-6513 |