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dc.creatorPang, Wancheng
dc.creatorYao, Jun
dc.creatorŠolević Knudsen, Tatjana
dc.creatorCao, Ying
dc.creatorLiu, Bang
dc.creatorLi, Hao
dc.creatorLi, Miaomiao
dc.creatorZhu, Junjie
dc.date.accessioned2022-10-05T13:09:00Z
dc.date.available2022-10-05T13:09:00Z
dc.date.issued2023
dc.identifier.issn1385-8947
dc.identifier.urihttps://cer.ihtm.bg.ac.rs/handle/123456789/5331
dc.description.abstractThis work systematically studied the kinetics and mechanism of degradation of salicylhydroxamic acid (SHA), benzhydroxamic acid (BHA) and N-hydroxyphthalimide (NOP) by UVA-B/H2O2 and UVA-B/peroxodisulfate (PDS). UVA-B irradiation could induce a direct photolysis of SHA and dominated SHA destruction in both systems. BHA and NOP were effectively degraded via HO•- and SO4•−-mediated oxidation. UVA-B/PDS displayed a better degradation performance for HAAs investigated than UVA-B/H2O2. An acidic pH was more suitable for three HAAs removal in the UVA-B/H2O2 system. However, basic pH was more efficient for HAAs degradation in the UVA-B/PDS system. The degradation of BHA and NOP was predominantly driven by SO4•− at all pH levels used (5.0–9.0). The second-order rate constants for SHA, BHA and NOP reactions with HO• and SO4•− were calculated to be (4.16–5.22) × 109 M−1•s−1 and (1.19–7.22) × 109 M−1•s−1, respectively. Presence of various water constituents had different influence on HAA removal, with a enhancement in the presence of HCO3–, Fe2+ and Cu2+. When real waters were used as a background, dissolved organic carbon and Cl− were the main factors that consumed radicals and affected the degradation performance of HAAs. Analysis of the transformation products and density functional theory revealed that all of the investigated HAAs first generated amidated products but the formation mechanisms might have been different. HAAs degradation pathways mainly included hydrolysis, hydroxylation, decarboxylation and ring opening processes. Toxicity evaluation showed that the UV/AOP degradation of HAAs generated some transformation products with higher acute toxicity than the parent compounds.sr
dc.language.isoensr
dc.publisherElseviersr
dc.relationThe Major National R & D Projects for Chinese Ministry of Science and Technology, Grant (2019YFC1803500)sr
dc.relationThe National Science Foundation of China (41720104007)sr
dc.relation111 Project (B21017)sr
dc.relationThe Graduate Innovation Fund Project of China University of Geosciences, Beijing (YB2021YC016).sr
dc.relationinfo:eu-repo/grantAgreement/MESTD/inst-2020/200026/RS//sr
dc.relationThe International Joint Scientific and Technical Collaboration between the People’s Republic of China and the Republic of Serbia as part of the Project Number 4-18sr
dc.relation.isversionofhttps://cer.ihtm.bg.ac.rs/handle/123456789/5546
dc.rightsrestrictedAccesssr
dc.sourceChemical Engineering Journalsr
dc.subjectDegradation kineticssr
dc.subjectHydroxamic acidsr
dc.subjectHydroxyl and sulfate radicalsr
dc.subjectTransformation pathwaysr
dc.subjectUVA-B irradiationsr
dc.titleDegradation of three typical hydroxamic acids collectors via UVA-B activated H2O2 and persulfate: Kinetics, transformation pathway, DFT calculation and toxicity evaluationsr
dc.typearticlesr
dc.rights.licenseARRsr
dc.citation.volume451
dc.citation.spage138639
dc.citation.rankaM21~
dc.description.otherThe peer-reviewed version: [https://cer.ihtm.bg.ac.rs/handle/123456789/5546]
dc.identifier.doi10.1016/j.cej.2022.138639
dc.identifier.scopus2-s2.0-85136506655
dc.type.versionpublishedVersionsr


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