...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Metal-catalyzed reduction of N-nitrosodimethylamine with hydrogen in water
【24h】

Metal-catalyzed reduction of N-nitrosodimethylamine with hydrogen in water

机译：水中氢金属催化还原N-亚硝基二甲胺

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

There is considerable need for the rapid destruction of N-nitrosodimethylamine (NDMA) in water because current alternative treatment methods are relatively inefficient. Powdered metal catalysts in conjunction with hydrogen gas showed notable potential for rapid destruction of N-nitrosodimethylamine (NDMA) in water. Palladium, copper-enhanced palladium, and nickel catalysts showed significant efficacy for NDMA reduction, with observed half-lives on the order of hours using 10 mg L-1 catalyst metal. Other catalysts were screened because of their well-documented efficacy for reduction of halogenated hydrocarbons, including zerovalent iron, nickel-enhanced iron, nickel, and manganese. Starting with 100 Ag L-1 NDMA, a level observed at multiple field sites, pseudo-first-order kinetics were observed for all catalysts tested. No reaction intermediates were observed in any experiment; the amine group of NDMA was cleaved and reduced to dimethylamine with carbon balance in excess of 97%. Reductive catalysis may prove an efficient technology for mitigating the health risk posed by NDMA; this study provides the foundation for mechanistic and longevity research.
机译：由于当前的替代处理方法效率相对较低，因此迫切需要快速消灭水中的N-亚硝基二甲胺（NDMA）。粉末金属催化剂与氢气一起显示出在水中快速破坏N-亚硝基二甲胺（NDMA）的显着潜力。钯，铜增强钯和镍催化剂显示出显着的NDMA还原功效，使用10 mg L-1催化剂金属观察到的半衰期约为数小时。筛选出其他催化剂是因为它们的文献记载有很好的还原卤代烃的功效，包括零价铁，镍增强铁，镍和锰。从100 Ag L-1 NDMA开始（在多个现场观察到的水平），对所有测试的催化剂观察到伪一级动力学。在任何实验中均未观察到反应中间体。 NDMA的胺基被裂解并还原为二甲胺，碳平衡超过97％。还原催化可能被证明是减轻NDMA造成健康风险的有效技术。该研究为机理和寿命研究提供了基础。

著录项

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