• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>African Journal of Biotechnology >Adsorption kinetics of cadmium and lead by chitosan
【24h】

Adsorption kinetics of cadmium and lead by chitosan

机译：壳聚糖对镉和铅的吸附动力学

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An evaluation of the kinetics and capacity of chitosan to trap lead and cadmium ions in aqueous solution was carried out at 25oC using concentration and contact time as parameters. The experiments were done as batch process. Our results show that the adsorption process is concentration-driven with high capacity of chitosan for the adsorption of these metal ions. The Infra red spectroscopic study on the chitosan and the metal-chitosan complexes reveal a metal coordination based on the observed characteristic band changes. At initial lead concentrations of 1000, 500, 400, 250 and 100 mg/L, the adsorbed lead ion concentrations are 557, 265, 218, 132 and 65 mg/L, respectively. However, for the cadmium, the adsorbed concentrations are 263, 165, 152, 78 and 45 mg/L, respectively at the same initial concentrations. The lead and cadmium adsorption kinetic behavior could not be described using the Langmuir isotherm over the whole concentration range but Freundlich isotherm conforms to the experimental data.
机译：在25oC下，以浓度和接触时间为参数，对壳聚糖捕获水溶液中铅和镉离子的动力学和能力进行了评估。实验是分批进行的。我们的结果表明，壳聚糖对这些金属离子的吸附能力高，其吸附过程受浓度驱动。壳聚糖和金属-壳聚糖配合物的红外光谱研究表明，基于观察到的特征谱带变化，金属配位。在初始铅浓度为1000、500、400、250和100 mg / L时，吸附的铅离子浓度分别为557、265、218、132和65 mg / L。但是，对于镉，在相同的初始浓度下，吸附浓度分别为263、165、152、78和45 mg / L。用Langmuir等温线无法描述整个浓度范围内的铅和镉吸附动力学行为，但Freundlich等温线符合实验数据。

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