Where Does the Transformation of Precipitated Ceria Nanoparticles in Hydroponic Plants Take Place?
Ma, YH; Zhang, P; Zhang, ZY; He, X; Zhang, JZ; Ding, YY; Zhang, J; Zheng, LR; Guo, Z; Zhang, LJ; Chai, ZF; Zhao, YL; Zhang, ZY (reprint author), Chinese Acad Sci, Inst High Energy Phys, Key Lab Biol Effects Nanomat & Nanosafety, Beijing 100049, Peoples R China.
2015
发表期刊ENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
卷号49期号:17页码:10667—10674
文章类型期刊文献
摘要Cerium oxide nanopartides (CeO2 NPs) have been found to be partly biotransformed from Ce(IV) to Ce(III) in plants, yet the transformation process and mechanism are not fully understood. Here, we try to clarify the specific site and necessary conditions for the transformation of precipitated CeO2 NPs in hydroponic cucumber plants. Three different treatment modes were adopted according to whether the NPs were incubated with roots all the time or not. Results showed that exposure modes significantly affect the translocation and transformation of CeO2 NPs. In the normal exposure mode, Ce was present as a Ce(IV) and Ce(III) mixture in the roots and shoots, and the proportion of Ce(III) in the shoots was enhanced obviously with the increase of exposure time. The results of short-time incubation and petiole exposure modes suggested that CeO2 NPs could not be reduced within a short incubation time (3 h) or be further reduced inside the plant tissues. It was deduced that root surfaces are the sites, and the physicochemical interaction between the NPs and root exudates at the nanobio interface is the necessary condition for the transformation of CeO2 NPs in plant systems. These results will contribute to understanding the transformation mechanism of CeO2 and other metal-based NPs and properly evaluate their ecological effects.
关键词Cucumber Cucumis-sativus X-ray-absorption Soybean Glycine-max Ceo2 Nanoparticles Oxide Nanoparticles Organic-matter Biotransformation Spectroscopy Speciation Toxicity
语种英语
WOS记录号WOS:000360773600047
引用统计
被引频次:23[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/25098
专题中科院上海应用物理研究所2011-2018年
通讯作者Zhang, ZY (reprint author), Chinese Acad Sci, Inst High Energy Phys, Key Lab Biol Effects Nanomat & Nanosafety, Beijing 100049, Peoples R China.
推荐引用方式
GB/T 7714
Ma, YH,Zhang, P,Zhang, ZY,et al. Where Does the Transformation of Precipitated Ceria Nanoparticles in Hydroponic Plants Take Place?[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2015,49(17):10667—10674.
APA Ma, YH.,Zhang, P.,Zhang, ZY.,He, X.,Zhang, JZ.,...&Zhang, ZY .(2015).Where Does the Transformation of Precipitated Ceria Nanoparticles in Hydroponic Plants Take Place?.ENVIRONMENTAL SCIENCE & TECHNOLOGY,49(17),10667—10674.
MLA Ma, YH,et al."Where Does the Transformation of Precipitated Ceria Nanoparticles in Hydroponic Plants Take Place?".ENVIRONMENTAL SCIENCE & TECHNOLOGY 49.17(2015):10667—10674.
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