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dc.contributor.authorZhao, Jianchen
dc.contributor.authorZhou, Yangjian
dc.contributor.authorLi, Chao
dc.contributor.authorXie, Qing
dc.contributor.authorChen, Jingwen
dc.contributor.authorChen, Guangchao
dc.contributor.authorPeijnenburg, Willie J G M
dc.contributor.authorZhang, Ya-Nan
dc.contributor.authorQu, Jiao
dc.date.accessioned2020-08-16T15:18:26Z
dc.date.available2020-08-16T15:18:26Z
dc.date.issued2020-04-10
dc.identifier.issn1879-1026
dc.identifier.pmid31931195
dc.identifier.doi10.1016/j.scitotenv.2019.136450
dc.identifier.urihttp://hdl.handle.net/10029/624095
dc.description.abstractSinglet oxygen (1O2) is capable of degrading organic contaminants and inducing cell damage and inactivation of viruses. It is mainly generated through the interaction of dissolved oxygen with excited triplet states of dissolved organic matter (DOM) in natural waters. The present study aims at revealing the underlying mechanism of 1O2 generation and providing a potential tool for predicting the quantum yield of 1O2 (Φ1O2) generation from DOM by constructing a quantitative structure-activity relationship (QSAR) model. The determined Φ1O2 values for the selected DOM-analogs range from (0.54 ± 0.23) × 10-2 to (62.03 ± 2.97) × 10-2. A QSAR model was constructed and was proved to have satisfactory goodness-of-fit and robustness. The QSAR model was successfully used to predict the Φ1O2 of Suwannee River fulvic acid. Mechanistic interpretation of the descriptors in the model showed that hydrophobicity, molecular complexity and the presence of carbonyl groups in DOM play crucial roles in the generation of 1O2 from DOM. The presence of other heteroatoms besides O, such as N and S, also affects the generation of 1O2. The results of this study provide valuable insights into the generation of 1O2 from DOM in sunlit natural waters.en_US
dc.language.isoenen_US
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectDissolved organic matteren_US
dc.subjectQuantitative structure-activity relationshipen_US
dc.subjectQuantum yielden_US
dc.subjectSinglet oxygenen_US
dc.titleDevelopment of a quantitative structure-activity relationship model for mechanistic interpretation and quantum yield prediction of singlet oxygen generation from dissolved organic matter.en_US
dc.typeArticleen_US
dc.identifier.journalSci Total Environ 2020; 712:136450en_US
dc.source.journaltitleThe Science of the total environment


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