• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Surface Science >Removal of nitrobenzene by immobilized nanoscale zero-valent iron: Effect of clay support and efficiency optimization
【24h】

Removal of nitrobenzene by immobilized nanoscale zero-valent iron: Effect of clay support and efficiency optimization

机译：固定化的纳米零价铁去除硝基苯：粘土载体的作用和效率优化

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

In this study, natural clays were used as the support for nanoscale zero-valent iron (nZVI) to fulfill affordable and efficient decontamination materials. In comparison with the kaolinite (K) and montmorillonite (M) supported nZVI materials (K-nZVI and M-nZVI), Hangjin clay supported nZVI (HJ-nZVI) exhibited the best performance for nitrobenzene (NB) removal because of its favorable characteristics, such as higher specific surface area (SSA, 82.0 m(2) g(-1)), larger pore volume (0.1198 cm(3) g(-1)) and bigger average pore diameter (6.2 nm). The NB removal efficiency achieved by HJ-nZVI (93.2 +/- 2.8%) was much higher than these achieved by HJ clay alone (38.2 +/- 2.3%), nZVI alone (52.3 +/- 2.5%) and by the combined use of nZVI and HJ clay (70.2 +/- 1.3%). The superior performance of HJ-nZVI was associated with three aspects: the even distribution of nZVIs onto HJ clay, higher payload efficiency of nZVIs and the stronger adsorption capability of HJ clay support. Higher SSA, larger pore volume, favorable cation exchange capacity and structural negative charges all facilitated the payload of iron onto HJ clay. The adsorption process accelerated the reduction via increasing the local concentration of aqueous NB. The high efficiency of HJ-nZVI for decontamination warranted its promising prospect in remediation applications. (C) 2016 Elsevier B.V. All rights reserved.
机译：在这项研究中，天然粘土被用作纳米级零价铁（nZVI）的载体，以实现负担得起的高效去污材料。与高岭石（K）和蒙脱石（M）负载的nZVI材料（K-nZVI和M-nZVI）相比，杭锦粘土负载的nZVI（HJ-nZVI）由于具有良好的特性而表现出最佳的硝基苯（NB）去除性能。例如更高的比表面积（SSA，82.0 m（2）g（-1）），更大的孔体积（0.1198 cm（3）g（-1））和更大的平均孔径（6.2 nm）。 HJ-nZVI达到的NB去除效率（93.2 +/- 2.8％）远远高于HJ粘土单独获得的（38.2 +/- 2.3％），nZVI单独获得的（52.3 +/- 2.5％）以及联合使用的去除率使用nZVI和HJ粘土（70.2 +/- 1.3％）。 HJ-nZVI的优异性能与三个方面有关：nZVIs在HJ粘土上的均匀分布，nZVIs的有效负载效率更高以及HJ粘土载体的吸附能力更强。较高的SSA，较大的孔体积，有利的阳离子交换能力和结构性负电荷均促进了铁在HJ粘土上的有效负载。吸附过程通过增加NB水溶液的局部浓度来加速还原过程。 HJ-nZVI的高效率去污保证了其在修复应用中的广阔前景。 （C）2016 Elsevier B.V.保留所有权利。

著录项

  • 来源
    《Applied Surface Science》 |2016年第may1期|260-269|共10页
  • 作者

    Li Xiaoguang; Zhao Ying; Xi Beidou; Mao Xuhui; Gong Bin; Li Rui; Peng Xing; Liu Hongliang;

  • 作者单位

    Beijing Normal Univ, Sch Environm, Beijing 100875, Peoples R China|Chinese Res Inst Environm Sci, State Environm Protect Key Lab Simulat & Control, Beijing 100012, Peoples R China|Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China;

    Chinese Res Inst Environm Sci, State Environm Protect Key Lab Simulat & Control, Beijing 100012, Peoples R China|Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China;

    Chinese Res Inst Environm Sci, State Environm Protect Key Lab Simulat & Control, Beijing 100012, Peoples R China|Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China;

    Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China;

    Chinese Res Inst Environm Sci, State Environm Protect Key Lab Simulat & Control, Beijing 100012, Peoples R China|Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China;

    Chinese Res Inst Environm Sci, State Environm Protect Key Lab Simulat & Control, Beijing 100012, Peoples R China|Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China;

    Beijing Normal Univ, Sch Environm, Beijing 100875, Peoples R China|Chinese Res Inst Environm Sci, State Environm Protect Key Lab Simulat & Control, Beijing 100012, Peoples R China|Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China;

    Beijing Normal Univ, Sch Environm, Beijing 100875, Peoples R China|Chinese Res Inst Environm Sci, State Environm Protect Key Lab Simulat & Control, Beijing 100012, Peoples R China|Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nanoscale zero-valent iron; Clay; Nitrobenzene; Reduction; Support materials; Immobilization;

    机译：纳米零价铁粘土硝基苯还原载体材料固定化;

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