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• W4385651908 endingPage "122348" @default.
• W4385651908 startingPage "122348" @default.
• W4385651908 abstract "Microplastics (MPs) generated from daily life are commonly collected by urban sewage pipe networks and then transfer to sludge in wastewater treatment plants. Conventional biochemical treatment processes cannot degrade MPs effectively, causing an ecological risk via sludge land use. Wet air oxidation (WAO) is a promising sludge treatment technology with a strong ability to decompose complex organic matter, but its potential for the removal of MPs in sludge was unclear. In this study, three common MPs (polyethylene, polystyrene, and polyethylene terephthalate, which are called PEMPs, PSMPs, and PETMPs) were added into the sludge samples (1 g MP in 180 mL sludge), to test the effects of WAO on sludge and MPs. The results showed that WAO simultaneously degraded sludge and the PEMPs, and the two degradation processes were relatively independent when oxygen was supplied adequately. The dissolution of PSMPs and organic matter in sludge was not affected by each other, but the degradation rate was slowed down due to the interaction of ketones and benzene compounds. The hydrolysis of sludge and PETMPs was accelerated, while the hydrolyzed products such as terephthalic acid were oxidized without interfering with each other. No obvious MPs remained in the effluent, and volatile fatty acids (VFAs) were the main components, among which acetic acid accounted for 90%. When the sludge was treated with PEMPs, PSMPs, or PETMPs, the concentration of acetic acid finally accounted for 45%, 21%, and 18% of DOC. Overall, MPs can be degraded or even mineralized during sludge WAO, and humic acid derivatives, acetate, and other small molecules of alcohols, ketones, or aldehydes were the typical intermediates." @default.
• W4385651908 created "2023-08-09" @default.
• W4385651908 creator A5001014826 @default.
• W4385651908 creator A5032894412 @default.
• W4385651908 creator A5053275663 @default.
• W4385651908 date "2023-10-01" @default.
• W4385651908 modified "2023-10-17" @default.
• W4385651908 title "Simultaneous degradation of microplastics and sludge during wet air oxidation" @default.
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• W4385651908 doi "https://doi.org/10.1016/j.envpol.2023.122348" @default.
• W4385651908 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37562524" @default.
• W4385651908 hasPublicationYear "2023" @default.
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