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Cheng, Xuhua; Wu, Jiao; Yu, Bingqing; Zhang, Min; Miao, Manhong; Mackey, Hamish; Li, Yao
Chemosphere (Oxford), September 2024, 2024-09-00, 20240901, Letnik: 363Journal Article
The presence of microplastics (MPs) products and particles in the environment can significantly impact the human body. Most MPs that enter the environment also enter the water cycle. During sunlight light irradiation (especially ultraviolet (UV) part) or UV disinfection, many of these MPs, particularly those rich in surface functional groups like thermoplastic polyurethanes (TPU), undergo physicochemical changes that can affect the formation of disinfection byproducts (DBPs). This study investigates the physicochemical changes of TPU in water after exposure to UV irradiation and incubation in the dark, as well as the formation of DBPs after chlorination. The results show that TPU undergo chain breakage, oxidation, and cross-linking when exposed to UV irradiation in an aqueous system. This leads to fragmentation into smaller particles, which facilitates the synthesis of DBPs. Subsequent research has demonstrated that the TPU leaching solution produces a significantly higher DBP content than the chlorination of TPU MPs, particularly at high concentrations of CHCl3. Therefore, it is important to give greater consideration to the soluble DBP precursors released by TPU. Display omitted •UV irradiation tends to oxidize MPs, making it less elastic and prone to breakage.•Chlorination of water containing TPU after UV irradiation produces excess DBP.•UV irradiation of TPU enhanced the release of DOM, thereby increased DBP formation.•The precursors of DBP come mainly from released DOM rather than the TPU themselves.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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