...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Stability of Citrate, PVP, and PEG Coated Silver Nanoparticles in Ecotoxicology Media
【24h】

Stability of Citrate, PVP, and PEG Coated Silver Nanoparticles in Ecotoxicology Media

机译：柠檬酸盐，PVP和PEG包覆的银纳米颗粒在生态毒理学介质中的稳定性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Silver nanoparticles (AgNPs) are present in the environment and a number of ecotoxicology studies have shown that AgNPs might be highly toxic, Nevertheless, there are little data on their stability in toxicology media. This is an important issue as such dynamic changes affect exposure dose and the nature of the toxicant studied and have a direct impact on all (eco)toxicology data. In this study, monodisperse citrate, PVP, and PEG coated AgNPs with a core size of approximately 10 nm were synthesized and characterized; their behavior was examined in standard OECD media used for Daphnia sp. acute and chronic tests (in the absence of Daphnia). Surface plasmon resonance, size, aggregation, and shape were monitored over 21 days,comparable to a chronic exposure period. Charge stabilized particles (citrate) were more unstable than sterically stabilized particles. Replacement of chloride in the media (due to concerns over chloride-silver interactions) with either nitrate or sulfate resulted in increased shape and dissolution changes. PVP-stabilized NPs in a 10-fold diluted OECD media (chloride present) were found to be the most stable, with only small losses in total concentration over 21 days, and no shape,aggregation, or dissolution changes observed and arerecommended for exposure studies.
机译：银纳米颗粒（AgNPs）存在于环境中，许多生态毒理学研究表明，AgNPs可能具有高毒性，尽管如此，关于其在毒理学介质中稳定性的数据很少。这是一个重要的问题，因为这种动态变化会影响暴露剂量和所研究毒物的性质，并直接影响所有（生态）毒理学数据。在这项研究中，合成并表征了单分散柠檬酸盐，PVP和PEG包被的AgNP，其核心尺寸约为10 nm。在用于水蚤的标准OECD介质中检查了它们的行为。急性和慢性检查（在没有水蚤的情况下）。与慢性暴露期相比，在21天内监测了表面等离子体共振，大小，聚集和形状。电荷稳定的颗粒（柠檬酸盐）比空间稳定的颗粒更不稳定。用硝酸盐或硫酸盐代替介质中的氯离子（由于担心氯离子与银离子的相互作用）会导致形状和溶解度增加。经PVP稳定的NP在10倍稀释的OECD介质（存在氯化物）中被发现是最稳定的，在21天的总浓度中损失很小，并且未观察到形状，聚集或溶出度变化，建议用于暴露研究。

著录项

  • 来源
    《Environmental Science & Technology》 |2012年第13期|p.7011-7017|共7页
  • 作者

    Mila Tejamaya; Isabella Roemer; Ruth C. Merrifield; Jamie R. Lead;

  • 作者单位

    School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT United Kingdom,School of Public Health, University of Indonesia, Kampus Baru Ul Depok 16424, Jawa Barat, Indonesia;

    School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT United Kingdom;

    School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT United Kingdom;

    School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT United Kingdom;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号