...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Colloids and Interfaces >Equilibrium, Kinetic, and Thermodynamic Studies of Cationic Dyes Adsorption on Corn Stalks Modified by Citric Acid
【24h】

Equilibrium, Kinetic, and Thermodynamic Studies of Cationic Dyes Adsorption on Corn Stalks Modified by Citric Acid

机译：柠檬酸改性玉米秸秆阳离子染料吸附的平衡，动力学和热力学研究

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

摘要

The modification of agricultural wastes and their use as low-cost and efficient adsorbents is a prospective pathway that helps diminish waste and decrease environmental problems. In the present research, the natural adsorption capacity of corn stalks (CS) was improved by modification of their surface with citric acid. The adsorption capacity of the modified corn stalks (CS-C) was determined with the help of cationic dyes (methylene blue and malachite green). The equilibrium, kinetics, and thermodynamics of the cationic dyes on CS-C were studied. The Langmuir isotherm model best fitted the data both for methylene blue and malachite green adsorption on CS-C. The adsorption kinetics of the cationic dyes was well described by the pseudo-second order model. Thermodynamic studies revealed that adsorption of the cationic dyes on CS-C was an endothermic process. Negative results of ΔGo (between ?31.8 and ?26.3 kJ mol?1) indicated that the adsorption process was spontaneous in all the tested temperatures. The present study verified that citric acid-modified corn stalks can be used as a low-cost and effective adsorbent for removal of cationic dyes from aqueous solutions.
机译：农业废物的改变及其作为低成本和高效吸附剂的用途是一条前瞻性途径，有助于减少浪费和减少环境问题。在本研究中，通过用柠檬酸改变它们的表面改善了玉米秸秆（CS）的天然吸附能力。在阳离子染料（亚甲基蓝色和孔雀石绿色）的帮助下测定改性玉米秸秆（CS-C）的吸附能力。研究了CS-C上阳离子染料的平衡，动力学和热力学。 Langmuir等温模型最能为CS-C进行亚甲基蓝色和孔雀石绿色吸附的数据。阳离子染料的吸附动力学通过伪二次阶模型很好地描述。热力学研究表明，阳离子染料对CS-C的吸附是吸热过程。 ΔGo（在31.8和？26.3 kJ摩尔→1之间）的负面结果表明，吸附过程在所有测试温度下都是自发的。本研究证实，柠檬酸改性的玉米秸秆可用作低成本和有效的吸附剂，用于从水溶液中除去阳离子染料。

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