• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Zero-valent iron nanoparticles with sustained high reductive activity for carbon tetrachloride dechlorination
【24h】

Zero-valent iron nanoparticles with sustained high reductive activity for carbon tetrachloride dechlorination

机译：零价铁纳米粒子，具有持续的高氯化碳脱氯的高温活性

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

Zero-Valent Iron nanoparticles (nZVI) have been extensively applied for the reduction of various recalcitrant organic contaminants, but their reactivity usually declines over time due to the formation of passive iron oxides. In this study we observed a sustained reactivity of nZVI for the dechlorination of carbon tetrachloride (CT) in water during several consecutive reaction cycles. The dechlorination rate constants increased substantially in Cycle 2, then remained at a high level over several consecutive cycles, and ultimately declined in Cycle 7. In the entire process, the solution pH increased only slightly from 7.0 to 7.8, which was different from other unbuffered nZVI reduction systems reported before. Characterization of the particle surface morphology and composition revealed an important role of Fe oxyhydroxide formation in self-buffering the solution pH and sustaining a high nZVI reactivity. Our study provides new knowledge on the nZVI dechlorination process and may offer implications for extending the lifetime of nZVI in wastewater treatment and environmental remediation applications.
机译：零价铁纳米粒子（NZVI）已被广泛应用于减少各种顽醋栗有机污染物，但由于形成被动氧化铁的形成，它们的反应性通常随着时间的推移而下降。在这项研究中，我们在几种连续的反应循环期间观察到NZVI在水中脱氯化物（CT）的脱氯的持续反应性。循环速率常数在循环2中大致增加，然后在几个连续循环中保持高水平，并最终在循环7中下降。在整个过程中，溶液pH仅略微增加7.0至7.8，这与其他无缓冲区不同NZVI减少系统之前报道。颗粒表面形态和组合物的表征揭示了Fe羟基氧化物形成在自缓冲溶液pH和维持高NZVI反应性中的重要作用。我们的研究为NZVI脱氯过程提供了新的知识，并可能提供对污水处理和环境修复应用中NZVI寿命的影响。

著录项

  • 来源
    《RSC Advances》 |2015年第67期|共8页
  • 作者

    Huo Ying-Chao; Li Wen-Wei; Min Di; Wang Dan-Dan; Liu Hou-Qi; Kong Qin; Lau Tai-Chu; Zeng Raymond J.;

  • 作者单位

    USTC CityU Adv Lab Environm Res &

    Technol Suzhou 215123 Peoples R China;

    Univ Sci &

    Technol China Dept Chem CAS Unban Pollutant Convers Hefei 230026 Peoples R China;

    Univ Sci &

    Technol China Dept Chem CAS Unban Pollutant Convers Hefei 230026 Peoples R China;

    USTC CityU Adv Lab Environm Res &

    Technol Suzhou 215123 Peoples R China;

    USTC CityU Adv Lab Environm Res &

    Technol Suzhou 215123 Peoples R China;

    USTC CityU Adv Lab Environm Res &

    Technol Suzhou 215123 Peoples R China;

    USTC CityU Adv Lab Environm Res &

    Technol Suzhou 215123 Peoples R China;

    USTC CityU Adv Lab Environm Res &

    Technol Suzhou 215123 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 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