Polystyrene microplastics enhance oxidative dissolution but suppress the aquatic acute toxicity of a commercial cadmium yellow pigment under simulated irradiation

Commercial cadmium yellow (CdS) pigment widely coexist with microplastics (MPs) in surface water, thus it is important to understand how MPs affect CdS pigment stability and toxicity under irradiation. Herein, the dissolution of CdS pigment (k = 0.118 h ) under irradiation was visibly increased to 0...

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Bibliographic Details
Published inJournal of hazardous materials Vol. 463; p. 132881
Main Authors Sun, Yonghao, Zhang, Jun, Jiang, Zhoujie, Wang, Yi, Duan, Peng, Min, Wei, Zhang, Weicheng
Format Journal Article
LanguageEnglish
Published Netherlands 05.02.2024
Subjects
Animals
Cadmium - toxicity
Humans
Microplastics - toxicity
Oxidative Stress
Plastics
Polystyrenes - metabolism
Polystyrenes - toxicity
Water
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - toxicity
Zebrafish - metabolism
Microplastics
Aquatic toxicity
CdS pigment
Oxidative dissolution
Reactive species
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Summary:Commercial cadmium yellow (CdS) pigment widely coexist with microplastics (MPs) in surface water, thus it is important to understand how MPs affect CdS pigment stability and toxicity under irradiation. Herein, the dissolution of CdS pigment (k = 0.118 h ) under irradiation was visibly increased to 0.144 h by polystyrene (PS) MPs, due to reactive species generation such as O , •OH and PS* , while O was unimportant to this process. The O , humic acid, photoaging status of PS MPs could promote PS MPs-related CdS pigment dissolution rate by modifying reactive species generation. However, the CO , PO and alkaline condition significantly decreased the dissolution rate to 0.091, 0.053 and 0.094 h , respectively, through modifying free Cd stability. Comparably, PS MPs-related CdS pigment dissolution was relatively slow in natural water samples (k = 0.075 h ). PS MPs at environmental concentration can also promote CdS pigment dissolution and Cd release, but suppress acute toxicity of CdS pigment to zebrafish larvae as increasing 10 h survival from 65% to 85% by adsorbing the Cd and decreasing Cd bioavailability. This study emphasized the environmental risks and human safety of CdS pigment should be carefully evaluated in the presence of PS MPs in aquatic environments.
Bibliography:ObjectType-Article-1
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ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2023.132881