...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Arsenic(V) adsorption mechanism using kaolinite, montmorillonite and illite from aqueous medium
【24h】

Arsenic(V) adsorption mechanism using kaolinite, montmorillonite and illite from aqueous medium

机译：含水介质中高岭石，蒙脱石和伊利石对砷（V）的吸附机理

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

The present work investigates the adsorptive behavior of As(V) ions with kaolinite, montmorillonite and illite in aqueous medium as a function of As(V) concentration, pH, contact time and temperature. As(V) adsorption on studied clays were pH dependent and maximum adsorption were achieved in the pH range 2.0-5.0. The adsorption data gave good fits with Langmuir isotherm and yielded Langmuir monolayer capacity of 0.86, 0.64 and 0.52 mg As(V)/g of kaolinite, montmorillonite and illite, respectively. An increase in adsorption temperature resulted in a decrease in the amount of As(V) adsorbed. The results of leaching study showed that, kaolinite was very active clay constituent regarding both As(V) adsorption and mobility. The electrokinetic behavior of both the kaolinite and montmorillonite were modified in the presence of As(V). The shift in isoelectric point indicated that adsorption involves inner sphere surface complexation and strong specific ion adsorption. Kaolinite was successfully tested as an adsorbent for the removal of arsenic from two contaminated groundwater samples containing arsenic in the range 1.36-1.41 mg/L.
机译：本工作研究了As（V）离子与高岭石，蒙脱土和伊利石在水介质中的吸附行为，作为As（V）浓度，pH，接触时间和温度的函数。 As（V）在研究的粘土上的吸附取决于pH，在2.0-5.0的pH范围内可获得最大吸附。吸附数据与Langmuir等温线非常吻合，Langmuir单层容量分别为0.86、0.64和0.52 mg As（V）/ g高岭石，蒙脱石和伊利石。吸附温度的升高导致As（V）吸附量的减少。浸出研究结果表明，就As（V）吸附和迁移率而言，高岭石是非常活跃的粘土成分。在As（V）的存在下，高岭石和蒙脱石的电动行为都发生了改变。等电点的变化表明吸附涉及内球表面络合和强比离子吸附。高岭石已成功测试作为吸附剂，用于从两个受污染的地下水样品中去除砷，砷样品的含量在1.36-1.41 mg / L之间。

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