PuSH - Publication Server of Helmholtz Zentrum München: Negligible effects of TiO2 nanoparticles at environmentally relevant concentrations on the translocation and accumulation of perfluorooctanoic acid and perfluorooctanesulfonate in hydroponically grown pumpkin seedlings (Cucurbita maxima x C. moschata).

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Xu, Z.* ; Tang, T.* ; Cheng, H.* ; Bao, Q.* ; Yu, J.* ; Zhang, C.* ; Wu, T.* ; Zhao, X.* ; Schramm, K.-W. ; Wang, Y.*

Negligible effects of TiO2 nanoparticles at environmentally relevant concentrations on the translocation and accumulation of perfluorooctanoic acid and perfluorooctanesulfonate in hydroponically grown pumpkin seedlings (Cucurbita maxima x C. moschata).

Sci. Total Environ. 686, 171-178 (2019)

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Titanium dioxide nanopartides (TiO2-NPs) are widely distributed in the environment. It has been demonstrated that TiO2-NPs could modify the environmental fate and bioavailability of organic pollutants, which affects ecological risks of TiO2-NPs and organic pollutants. In this study, the uptake, translocation and accumulation of perfluorooctanoic acid (PFOA) and perfluorooclanesulfonate (PFOS) in pumpkin plants was investigated in the presence of TiO2-NPs. We reported for the first lime the negligible effects of TiO2-NPs al environmentally relevant concentrations (0.05-5 mg/L) on the uptake and accumulation of PFOA and PFOS in hydroponically grown pumpkin seedlings regardless of root, stem and leaf. This phenomenon was independent of the initial concentrations of PFOA/PFOS and TiO2-NPs in the exposure solution. Also, seedling mass and contents of chlorophyll and anthocyanin were not affected by the co-exposure. Adsorption tests demonstrated the negligible adsorption of PFOA/PFOS on TiO2-NPs in the exposure solution. Moreover, uptake of PFOA/PFOS was insensitive to aquaporin inhibitor AgNO3 but significantly inhibited by niflumic acid (anion channel blocker) and 2,4-d initrophenol (metabolic inhibitor) whereas Ti concentration in root was not affected by niflumic acid and 2,4-din itrophenol but significantly decreased by AgNO3, indicating that transport of PFOA/PFOS and TiO2-NPs were via different routes into the pumpkin seedling. It was proposed that different pathways by which TiO2-NPs and PFOA/PFOS transported into the pumpkin seedling and negligible adsorption of PFOA/PFOS on TiO2-NPs contributed to the negligible effects of TiO2-NPs on the uptake, translocation and accumulation of PFOA/PFOS in pumpkin seedlings. In total, this work would improve our understanding of the ecological risks of TiO2-NPs in the environment.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Tio2 Nanoparticles ; Pumpkin Seedling ; Perfluoroalkyl Substances ; Uptake ; Accumulation; Titanium-dioxide Nanoparticles; Sulfonate Pfos; Surface Waters; Bioaccumulation; Toxicity; Nano-tio2; Zebrafish; Release; Bioconcentration; Chlorophyll

ISSN (print) / ISBN 0048-9697

e-ISSN 1879-1026

Journal Science of the Total Environment, The

Quellenangaben Volume: 686, Pages: 171-178

Publisher Elsevier

Publishing Place Radarweg 29, 1043 Nx Amsterdam, Netherlands

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) PPM-MEX-Molecular EXposomics (MEX)