Transformation of ceria nanoparticles in cucumber plants is influenced by phosphate

Yukui Rui, Peng Zhang, Yanbei Zhang, Yuhui Ma, Xiao He, Xin Gui, Yuanyuan Li, Jing Zhang, Lirong Zheng, Shengqi Chu, Zhi Guo, Zhifang Chai, Yuliang Zhao, Zhiyong Zhang

Research output: Contribution to journalArticle

61 Scopus citations

Abstract

Transformation is a critical factor that affects the fate and toxicity of manufactured nanoparticles (NPs) in the environment and living organisms. This paper aims to investigate the effect of phosphate on the transformation of CeO2 NPs in hydroponic plants. Cucumber seedlings were treated with 2000 mg/L CeO2 NPs in nutrient solutions with or without adding phosphate (+P or –P) for 3 weeks. Large quantities of needle-like CePO4 was found outside the epidermis in the +P group. While in the –P group, CePO4 only existed in the intercellular spaces and vacuole of root cells. X-ray absorption near edge spectroscopy (XANES) indicates that content and percentage of Ce-carboxylates in the shoots of –P group (418 mg/kg, 67.5%) were much higher than those in the +P group (30.1 mg/kg, 21%). The results suggest that phosphate might influence the transformation process of CeO2 NPs in plants and subsequently their ultimate fate in the ecosystem.

Original languageEnglish (US)
Pages (from-to)8-14
Number of pages7
JournalEnvironmental Pollution
Volume198
DOIs
StatePublished - Mar 1 2015

Keywords

  • CeO
  • CePO
  • Nanoparticles
  • Plant
  • Transformation
  • Translocation

ASJC Scopus subject areas

  • Toxicology
  • Pollution
  • Health, Toxicology and Mutagenesis

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