Trophic Transfer and Transformation of CeO2 Nanoparticles along a Terrestrial Food. Chain: Influence of Exposure Routes
文献类型：期刊论文
| 作者 | Ding YY(丁雅韵) ; 张鹏(多); Zhang, ZY; Zhao, YL; Chai, ZF; Zheng, LR; Zhang, J; Luo, WH; Xie, CJ; Wang, GH
|
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2018 |
| 卷号 | 52期号:14页码:7921-7927 |
| ISSN号 | 0013-936X |
| DOI | 10.1021/acs.est.8b00596 |
| 文献子类 | Article |
| 英文摘要 | The trophic transfer and transformation of CeO2 nanoparticles (NPs) through a simulated terrestrial food chain were investigated using a radiotracer technique and X-ray absorption near edge structure (XANES). Radioactive (CeO2)-Ce-141 NPs were applied to head lettuce (Lactuca sativa), treated via root exposure in its potting soil (5.5 or 11 mg/plant) for 30 days or foliar exposure (7.2 mg/plant, with half of the leaves treated and the other half not) for 7 days. Subsequently, two groups of land snails (Achatina fulica) were exposed to Ce-141 via either a direct (i.e., feeding on the lettuce leaves with Ce-141-contaminated surfaces) or an indirect/trophic (i.e., feeding on the lettuce leaves with systemically distributed Ce-141) route. To evaluate the influence of exposure routes, the Ce contents of the lettuce, snail tissues, and feces were determined by radioactivity measurements. The results show that both assimilation efficiencies (AEs) and food ingestion rates of Ce are greater for the trophic (indirect) exposure. The low AEs indicate that the CeO2 NPs ingested by snails were mostly excreted subsequently, and those that remained in the body were mainly concentrated in the digestive gland. XANES analysis shows that >85% of Ce was reduced to Ce(III) in the digestive gland under direct exposure, whereas Ce in the rest of the food chain (including feces) was largely in its original oxidized (IV) state. This study suggests that CeO2 NPs present in the environment may be taken up by producers and transferred to consumers along food chains and trophic transfer may affect food safety. |
| 电子版国际标准刊号 | 1520-5851 |
| WOS关键词 | CERIUM OXIDE NANOPARTICLES ; SOYBEAN GLYCINE-MAX ; CUCUMBER PLANTS ; PARTICLE-SIZE ; ENGINEERED NANOMATERIALS ; SILVER NANOPARTICLES ; ORGANIC-MATTER ; DIETARY UPTAKE ; BIOACCUMULATION ; BIOTRANSFORMATION |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000439397800038 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/286133]  |
| 专题 | 高能物理研究所_多学科研究中心 高能物理研究所_实验物理中心 |
| 通讯作者 | Zhang ZY(张智勇) |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Ding YY,Zhang P,Zhang, ZY,et al. Trophic Transfer and Transformation of CeO2 Nanoparticles along a Terrestrial Food. Chain: Influence of Exposure Routes[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2018,52(14):7921-7927. |
| APA | 丁雅韵.,张鹏.,Zhang, ZY.,Zhao, YL.,Chai, ZF.,...&张珺哲.(2018).Trophic Transfer and Transformation of CeO2 Nanoparticles along a Terrestrial Food. Chain: Influence of Exposure Routes.ENVIRONMENTAL SCIENCE & TECHNOLOGY,52(14),7921-7927. |
| MLA | 丁雅韵,et al."Trophic Transfer and Transformation of CeO2 Nanoparticles along a Terrestrial Food. Chain: Influence of Exposure Routes".ENVIRONMENTAL SCIENCE & TECHNOLOGY 52.14(2018):7921-7927. |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。