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- W1890484721 abstract "Engineered nanoparticles (NPs) and natural organic matter (NOM) in the environment may interact with background contaminants such as heavy metals and modify their bioavailability and toxicity. In the present study, the combined influences of 2 common NPs (TiO2 and CeO2) and humic acid (HA; as a model NOM) on Cu(II) phytotoxicity to rice were investigated by a 3-d root elongation assay performed on filter paper media. The results showed that the adsorption coefficients of bare TiO2 and CeO2 NPs (100 mg/L) toward Cu2+ are 2.65 and 4.37, respectively, at an initial concentration of 10 mg/L, suggesting that Cu(II) could be strongly adsorbed by NPs, whereas HA-coated TiO2 and CeO2 NPs further enhanced the adsorption coefficients to 4.37 and 6.85, respectively. In addition, compared with Cu-alone treatment, the addition of bare TiO2 and CeO2 NPs (1000 mg/L) increased the length of rice root by 32.5% and 39.0%, respectively; however, the presence of HA-coated TiO2 and CeO2 NPs increased the root length by 90.2% and 100.1%, respectively, which indicated that the mitigation effect of HA-coated NPs on Cu(II) phytotoxicity was more visible than that of bare NPs. The results demonstrated that coexistence of NPs and HA significantly alleviated Cu(II) phytotoxicity as a result of a decrease in bioavailable soluble Cu(II) concentration, which contributes to an understanding of the potential behavior of NPs in the environment. Environ Toxicol Chem 2015;34:1588–1596. © 2015 SETAC" @default.
- W1890484721 created "2016-06-24" @default.
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- W1890484721 date "2015-04-30" @default.
- W1890484721 modified "2023-09-22" @default.
- W1890484721 title "Mitigation of Cu(II) phytotoxicity to rice (<i>Oryza sativa</i>) in the presence of TiO<sub>2</sub>and CeO<sub>2</sub>nanoparticles combined with humic acid" @default.
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- W1890484721 doi "https://doi.org/10.1002/etc.2953" @default.
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