• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Surface Science >Effective adsorption of Cr(VI) on mesoporous Fe-functionalized Akadama clay: Optimization, selectivity, and mechanism
【24h】

Effective adsorption of Cr(VI) on mesoporous Fe-functionalized Akadama clay: Optimization, selectivity, and mechanism

机译：Cr（VI）在介孔铁功能化的赤羽粘土上的有效吸附：优化，选择性和机理

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 Japanese volcanic soil, Akadama clay, was functionalized with metal salts (FeCl3, AlCl3, CaCl2, MgCl2, MnCl2) and tested for Cr(VI) removal from aqueous solution. FeCl3 was selected as the most efficient activation agent. To quantitatively investigate the independent or interactive contribution of influencing factors (solution pH, contact time, adsorbent dose, and initial concentration) to Cr(VI) adsorption onto Fe-functionalized AC (FFAC), factorial experimental design was applied. Results showed initial concentration contributed most to adsorption capacity of Cr(VI) (53.17%), followed by adsorbent dosage (45.15%), contact time (1.12%) and the interaction between adsorbent dosage and contact time (0.37%). The adsorption showed little dependence on solution pH from 2 to 8. Adsorption selectivity of Cr(VI) was evaluated through analyzing distribution coefficient, electrical double layer theory, as well as the valence and Pauling's ionic radii of co-existing anions (Cl-, SO42-, and PO43-). EDX and XPS analyses demonstrated the adsorption mechanism of Cr(VI) onto FFAC included electrostatic attraction, ligant exchange, and redox reaction. Improved treatment for tannery wastewater shows a potential application of FFAC as a cost-effective adsorbent for Cr(VI) removal. (C) 2015 Elsevier B.V. All rights reserved.
机译：用金属盐（FeCl3，AlCl3，CaCl2，MgCl2，MnCl2）对日本火山土壤赤羽粘土进行功能化，并测试从水溶液中去除的六价铬。 FeCl3被选为最有效的活化剂。为了定量研究影响因素（溶液pH值，接触时间，吸附剂剂量和初始浓度）对Cr（VI）吸附在铁功能化AC（FFAC）上的独立或交互作用，应用了析因实验设计。结果表明，初始浓度对Cr（VI）的吸附容量影响最大（53.17％），其次是吸附剂量（45.15％），接触时间（1.12％）以及吸附剂量和接触时间之间的相互作用（0.37％）。吸附对溶液pH在2至8之间几乎没有依赖性。通过分析分布系数，双电层理论以及共存阴离子（Cl-，的价和Pauling离子半径）评估了Cr（VI）的吸附选择性。 SO42-和PO43-）。 EDX和XPS分析表明Cr（VI）在FFAC上的吸附机理包括静电吸引，配体交换和氧化还原反应。对制革废水的改进处理表明，FFAC作为脱铬（VI）的经济有效吸附剂的潜在应用。 （C）2015 Elsevier B.V.保留所有权利。

著录项

  • 来源
    《Applied Surface Science》 |2015年第30期|128-136|共9页
  • 作者

    Ji Min; Su Xiao; Zhao Yingxin; Qi Wenfang; Wang Yue; Chen Guanyi; Zhang Zhenya;

  • 作者单位

    Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China;

    Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China;

    Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China|Univ Tsukuba, Grad Sch Life & Environm Sci, Tsukuba, Ibaraki 3058572, Japan;

    Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China;

    Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China;

    Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China;

    Univ Tsukuba, Grad Sch Life & Environm Sci, Tsukuba, Ibaraki 3058572, Japan;

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

    Fe-functionalized Akadama clay; Cr(VI) adsorption; Contribution; Selectivity; Mechanism;

    机译：铁功能化的赤羽粘土;Cr（VI）的吸附;贡献;选择性;机理;

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