Environmentally relevant concentrations of microplastic exhibits negligible impacts on thiacloprid dissipation and enzyme activity in soil

Environmental Research
Zhenlan XuLingxiangyu Li

Abstract

Microplastics (MPs) as a type of emerging contaminant in the environment have attracted extensive attentions in recent years, and understanding the impacts of MPs on soil biodiversity and functioning are thus increasingly urgent. Nevertheless, few studies were performed to investigate potential effects of MPs on decay of soil organic pollutants in particular pesticides and enzyme activities. Herein, three types of MPs including polystyrene fragments (PS-50) and polyvinyl chloride beads (PVC-42000 and PVC-10) were added to soil at environmentally relevant concentrations (0.2 and 1.0%) to study their impacts on dissipation of thiacloprid and activities of urease, acid phosphatase, invertase and catalase. MPs exhibited negligible impacts on thiacloprid dissipation regardless of MPs type and content, being probably attributed to the unaltered bioavailability of thiacloprid in soil even after an addition of MPs, which was documented by using the hydroxypropyl-β- cyclodextrin (HPCD) extraction method. Batch sorption experiments also exhibited the comparable adsorption capacity of thiacloprid to soil with and without MPs, along with Kf valuses of 3.44-3.77. Besides, MPs exerted negligible effects on enzyme activities of soil. Taken to...Continue Reading

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Citations

Jul 8, 2021·Journal of Hazardous Materials·Evgenios AgathokleousEdward J Calabrese
Aug 11, 2021·The Science of the Total Environment·Haobo YaXin Wang
Aug 30, 2021·Environmental Pollution·Eduardo Antonio Lozano-HernándezFélix Augusto Hernández-Guzmán

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