...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Science of the total environment >New insights on nanostructure of ordered mesoporous Fe-Mn bimetal oxides (OMFMs) by a novel inverse micelle method and their superior arsenic sequestration performance: Effect of calcination temperature and role of Fe/Mn oxides
【24h】

New insights on nanostructure of ordered mesoporous Fe-Mn bimetal oxides (OMFMs) by a novel inverse micelle method and their superior arsenic sequestration performance: Effect of calcination temperature and role of Fe/Mn oxides

机译：通过新型逆胶束法对有序中孔Fe-Mn二金属氧化物（OMFMS）的新见解及其优异的砷封存性能：煅烧温度和Fe / Mn氧化物的作用

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

A series of ordered mesoporous Fe-Mn bimetal oxides (OMFMs) were fabricated by using a novel inverse micelle method, and the texture, nanostructure and interface chemistry properties of OMFMs were closely correlated to the calcination temperature. Due to the amorphous regular inner-connected nanostructure and bimetallic synergistic effect, the obtained OMFMs exhibited superior arsenic sequestration performance than pure mesoporous Fe oxides (PMF)and Mn oxides (PMM). The optimum ratio of Fe/Mn and calcination temperature for arsenic removal was 3/1 and 350 °C (OMFM-3), and the maximum As(Ⅲ) and As(Ⅴ) adsorption capacities of OMFM-3 were 174.59 and 134.58 mg/g, respectively. Solution pH value negligibly affected the uptake of arsenic (ranged from 3.0 to 7.0), while SiO_3~(2-)/PO_4~(3-) ions and humic acid (HA) displayed significant inhibitory effect on arsenic removal by OMFM-3. According to the mechanism of arsenic removal, which simultaneously analyzed the arsenic redox transformation in aqueous phase and on solid phase interface, it was concluded that manganese oxides in OMFM-3 mainly played the role as a remarkable As(Ⅲ) oxidant in water, whereas iron oxides dominantly acted as an excellent arsenic species adsorbent. Finally, the prominent arsenic sequestration behavior and performance in surface water suggested that OMFM-3 could be a promising and hopeful candidate for arsenic-contaminated (especially As(Ⅲ)) surface water and groundwater remediation and treatment.
机译：通过使用新型逆胶束方法制造一系列有序的介孔Fe-Mn双金属氧化物（OMFMS），并且OMFMS的质地，纳米结构和界面化学性质与煅烧温度密切相关。由于无定形的常规内连接纳米结构和双金属协同效应，所获得的OMFMS表现出比纯介孔Fe氧化物（PMF）和Mn氧化物（PMM）的优异的砷封存性能。 Fe / Mn和钙化温度的最佳比率除去砷的除去为3/1和350℃（OMFM-3），最大值为（Ⅲ）和OMFM-3的吸附容量为174.59和134.58毫克/ g分别。溶液pH值可忽略地影响砷的摄取（范围为3.0至7.0），而SiO_3〜（2 - ）/ Po_4〜（3-）离子和腐殖酸（HA）对OMFM-3的砷除去显着的抑制作用。根据砷的方法，其同时分析了水相和固相界面中的砷氧化还原转化，得出结论，omfm-3中的锰氧化物主要在水中作为（Ⅲ）氧化剂的作用主要发挥作用，而氧化铁占优势砷物种吸附剂。最后，突出的砷封存行为和表面水中的性能表明，OMFM-3可能是砷污染的有前途和有希望的候选者（特别是（Ⅲ））地表水和地下水修复和治疗。

著录项

  • 来源
    《Science of the total environment》 |2021年第25期|143163.1-143163.11|共11页
  • 作者

    Jun Lu; Zhipan Wen; Yalei Zhang; Gang Cheng; Rui Xu; Xiaohu Gong; Xin Wang; Rong Chen;

  • 作者单位

    School of Chemistry and Environmental Engineering Wuhan Institute of Technology Wuhan 430205 People's Republic of China;

    School of Chemistry and Environmental Engineering Wuhan Institute of Technology Wuhan 430205 People's Republic of China;

    State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai 200092 People's Republic of China;

    School of Chemistry and Environmental Engineering Wuhan Institute of Technology Wuhan 430205 People's Republic of China;

    School of Chemistry and Environmental Engineering Wuhan Institute of Technology Wuhan 430205 People's Republic of China;

    School of Chemistry and Environmental Engineering Wuhan Institute of Technology Wuhan 430205 People's Republic of China;

    School of Chemistry and Environmental Engineering Wuhan Institute of Technology Wuhan 430205 People's Republic of China;

    School of Chemistry and Environmental Engineering Wuhan Institute of Technology Wuhan 430205 People's Republic of China;

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

    Mesoporous nanomaterials; Fe-Mn bimetal oxides; Arsenic; Redox transformation; Mechanism;

    机译：中孔纳米材料;Fe-Mn双金属氧化物;砷;氧化还原转化;机制;

相似文献

  • 外文文献
  • 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