...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Kinetics of C_(60) Fullerene Dispersion in Water Enhanced by Natural Organic Matter and Sunlight
【24h】

Kinetics of C_(60) Fullerene Dispersion in Water Enhanced by Natural Organic Matter and Sunlight

机译：天然有机物和阳光促进水中C_（60）富勒烯分散的动力学

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

The industrial-scale production of Buckminster fullerene C_(60) elicits concerns over its impact on human health and ecosystems because of the reported, albeit debatable, toxicity. Assessment of the overall environment risk requires a good estimate of the level of exposure and careful characterization of the physicochemical properties of C_(60) in natural aqueous environments. The reported study investigates the role of various environmental factors, i.e., ionic composition, natural organic matter (NOM), and light in dispersion of C_(60) in the aqueous phase by simple mixing.The presence of NOM greatly enhances C_(60) dispersion, and the dispersion process is further accelerated by sunlight. At typical NOM concentrations found in natural waters, C_(60) concentrations of a few to tens of milligrams per liter can occur within 10 days of mixing, regardless of its extremely low water solubility. The rate of dispersing decreases with the increase of ionic strength. However, calcium ions significantly increase C_(60)concentration in the aqueous phase. Results from UV/vis absorbance characterization strongly suggest that C_(60)may have been chemically modified when dispersed in an NOM solution in the presence of sunlight. This reaction pathway has significant implication on the fate, transport, and environmental impact of C_(60) fullerene.
机译：由于报道了尽管有争议的毒性，但工业上生产的小白菜富勒烯C_（60）引起了人们对它对人类健康和生态系统的影响的担忧。评估整体环境风险需要对暴露水平进行良好的估算，并仔细表征自然水环境中C_（60）的理化性质。通过简单的混合研究，研究了各种环境因素的作用，即离子组成，天然有机物（NOM）和光在C_（60）在水相中的分散中.NOM的存在大大增强了C_（60）分散，并且阳光进一步加速了分散过程。在天然水中发现的典型NOM浓度下，混合后10天之内C_（60）浓度可达每升几毫克至几十毫克，而不管其水溶性极低。分散速度随着离子强度的增加而降低。但是，钙离子显着增加了水相中的C_（60）浓度。 UV / vis吸光度表征的结果强烈表明，在有阳光的情况下将C_（60）分散在NOM溶液中时，可能已被化学修饰。此反应途径对C_（60）富勒烯的命运，运输和环境影响具有重要意义。

著录项

  • 来源
    《Environmental Science & Technology》 |2009年第10期|3574-3579|共6页
  • 作者

    QILIN LI; BIN XIE; YU SIK HWANG; YUANKAI XU;

  • 作者单位

    Department of Civil and Environmental Engineering, Rice University, Houston Texas 77005;

    Department of Civil and Environmental Engineering, Rice University, Houston Texas 77005;

    Department of Civil and Environmental Engineering, Rice University, Houston Texas 77005;

    Department of Chemical and Biomolecular Engineering, Rice University,Houston Texas 77005;

  • 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