• 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 >Highly Efficient Removal of Lead Ions from Aqueous Solutions Using Chitosan/Rice Husk Ash/Nano Alumina with a Focus on Optimization by Response Surface Methodology: Isotherm, Kinetic, and Thermodynamic Studies
【24h】

Highly Efficient Removal of Lead Ions from Aqueous Solutions Using Chitosan/Rice Husk Ash/Nano Alumina with a Focus on Optimization by Response Surface Methodology: Isotherm, Kinetic, and Thermodynamic Studies

机译：使用壳聚糖/稻壳灰/纳米氧化铝的水溶液高效除去铅离子，重点是通过响应面方法优化：等温，动力学和热力学研究

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

In the present study, an adsorbent named chitosan/rice husk ashano- alumina was prepared and used for the removal of lead ions from aqueous solutions. It was characterized by FESEM, FTIR, XRD, and BET. The important and interactive effects of some considered parameters, such as the initial lead ion concentration, pH, adsorbent mass and contact time, were estimated and optimized by using the central composite design (CCD). The Maximum adsorption efficiency of lead ions under optimum conditions, including the pH of 5, adsorbent mass of 0.01g, the initial lead ion concentration of 30ppm, and the contact time of 105min, was achieved to be 90.98%. The adsorption kinetic was consistent with the pseudo-second-order model (R-2=0.9967). The lead adsorption isotherms were well fitted to the Langmuir model, indicating the maximum adsorption capacity of 181.82mgg(-1). Thermodynamic parameters (R-2: 0.9200, H degrees: -22871.81kJmol(-1), G(degrees): -10.63kJmol(-1), and S-degrees: 118.37kJmol(-1)K(-1)) were calculated and indicating adsorption process was exothermic and spontaneous in the temperature range of 283.15-313.15k. The maintenance above 70% capacity of the adsorbent was observed by the regeneration study of chitosan/rice husk ashano- alumina after six cycles. Comparison of adsorption efficiency of the studied adsorbent and other adsorbents in the removal of lead ions was also done in this paper. Consequently, the excellent properties of the presented nanocomposite could make it an ideal adsorbent for the removal of lead ions from aqueous solutions.[GRAPHICS].
机译：在本研究中，制备了一种名为壳聚糖/稻壳灰/纳米氧化铝的吸附剂并用于从水溶液中除去铅离子。它的特点是FESEM，FTIR，XRD和BET。通过使用中央复合设计（CCD）估计和优化一些考虑参数的重要和交互式效果，例如初始铅离子浓度，pH，吸附物质和接触时间，并优化。最佳条件下铅离子的最大吸附效率，包括5的pH值，吸附剂质量为0.01g，初始铅离子浓度为30ppm，以及105min的接触时间，达到90.98％。吸附动力学与伪二阶模型一致（R-2 = 0.9967）一致。铅吸附等温线适合于Langmuir模型，表明最大吸附容量为181.82mgg（-1）。热力学参数（R-2：0.9200，H度：-22871.81KJmol（-1），G（度）：-10.63kJmol（-1）和S-Degete：118.37kjmol（-1）k（-1））计算并表明吸附过程在283.15-313.15K的温度范围内放热和自发。通过壳聚糖/稻壳灰/纳米 - 氧化铝在六个循环后的再生研究观察​​到吸附剂以上的维持量高于70％的吸附剂。本文还完成了研究的吸附剂和其他吸附剂的吸附效率的比较。因此，所呈现的纳米复合材料的优异性能可以使其成为从水溶液中除去铅离子的理想吸附剂。[图形]。

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