Size-dependent transformation, uptake, and transportation of SeNPs in a wheat–soil system

Lihui LYU, Hanqi WANG, Ruifang LIU, Wenjing XING, Jiao LI, Yu Bon MAN, Fuyong WU

Research output: Contribution to journalArticlespeer-review

Abstract

Foliar application of selenium nanoparticles (SeNPs) has been used to enhance Se concentration in winter wheat, but soil application of SeNPs on Se uptake in the crop and their transformation in soil are still limited. This study investigated the effects of varying sizes (50, 100, 200 nm) and concentrations (0, 2, 5, 25, 100 mg kg−1) of chemical synthesized SeNPs in soil on uptake and accumulation of Se in the crop at maturity and related mechanisms. SeNPs not only posed very low toxic to plant growth, except for leaf, but also significantly enhanced grain Se concentration. Regardless of concentration of SeNPs added to soil, the transformation rate of the larger sized SeNPs (200 nm) in soil was significantly (p < 0.05) higher than that of the smaller one, which is mainly due to the latter was more easily adsorbed onto soil organic matter and reluctant to be oxidized. Significantly higher grain Se concentration under the larger sized SeNPs contributed to significantly higher transformation rate of SeNPs and concentration of available Se in soil. The present study showed that the larger sized SeNPs in soil had significant advantages including higher grain Se concentration and Se utilization efficiency for wheat Se biofortification. Copyright © 2021 Elsevier B.V. All rights reserved.
Original languageEnglish
Article number127323
JournalJournal of Hazardous Materials
Volume424
Issue numberPart A
Early online dateSep 2021
DOIs
Publication statusPublished - Feb 2022

Citation

Lyu, L., Wang, H., Liu, R., Xing, W., Li, J., Man, Y. B., & Wu, F. (2022). Size-dependent transformation, uptake, and transportation of SeNPs in a wheat–soil system. Journal of Hazardous Materials, 424(Part A). Retrieved from https://doi.org/10.1016/j.jhazmat.2021.127323

Keywords

  • Biofortification
  • Selenium nanoparticles
  • Winter wheat
  • Transformation
  • Particle size

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