• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Polymers and the Environment >Preparation, Characterization, and Rapid Adsorption of Hg2+ on Nanoscale Aramid-based Adsorbent
【24h】

Preparation, Characterization, and Rapid Adsorption of Hg2+ on Nanoscale Aramid-based Adsorbent

机译：Hg2 +在纳米芳纶基吸附剂上的制备，表征和快速吸附

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 nanaoscale aramid-based adsorbents were prepared by the functionalization of poly (p-phenylene terephthalamide) (PPTA) with different content of ethylenediamine (EDA). Their structures were characterized by field emission scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and elemental analysis. Metal ions, including Hg2+, Pb2+, Ag+, Cu2+, Cd2+, and Ni2+ were chosen as the models to explore the binding behaviors of PPTA-ECH-EDA in aqueous medium. Results showed that PPTA-ECH-EDA exhibited higher adsorption capacity for Hg2+ due to their nanoscale structures. In particular, the adsorption rate was so high that equilibrium was achieved within 15 min for Hg2+. The adsorption of Hg2+ on PPTA-ECH-EDA followed the pseudo second-order model well. Langmuir and Freundlich models were employed to fit the isothermal adsorption, and the results revealed that Freundlich isotherm was a better model to predict the experimental data. The adsorption mechanism was revealed by X-ray photoelectron spectroscopy. It is preconceived that PPTA-ECH-EDA could be used as an effective adsorbent for fast removal of heavy ions from wastewater.
机译：通过功能化具有不同乙二胺（EDA）含量的聚对苯二甲酰对苯二甲酰胺（PPTA），制备了一系列纳米级芳族聚酰胺基吸附剂。通过场发射扫描电子显微镜，透射电子显微镜，傅立叶变换红外光谱，热重分析和元素分析对它们的结构进行了表征。选择金属离子，包括Hg2 +，Pb2 +，Ag +，Cu2 +，Cd2 +和Ni2 +作为模型，探讨PPTA-ECH-EDA在水性介质中的结合行为。结果表明，PPTA-ECH-EDA由于具有纳米结构，因此对Hg2 +的吸附能力更高。特别是，吸附速率非常高，以至于Hg2 +在15分钟内就达到了平衡。 Hg2 +在PPTA-ECH-EDA上的吸附遵循伪二级模型。用Langmuir和Freundlich模型拟合等温吸附，结果表明Freundlich等温线是预测实验数据的较好模型。通过X射线光电子能谱揭示了吸附机理。可以预见，PPTA-ECH-EDA可以用作从废水中快速去除重离子的有效吸附剂。

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