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›› 2012, Vol. 12 ›› Issue (5): 776-780.

• 反应与分离 • Previous Articles     Next Articles

Adsorption of Cu2+ from Aqueous Solution by Polyacid Modified Shaddock Shin

TANG Wen-qing ZENG Rong-ying FENG Yong-lan WU Wei WANG Xue-xin LI Xiao-ming   

  1. Department of Chemistry and Materials Science, Hengyang Normal University Department of Chemistry and Materials Science, Hengyang Normal University Department of Chemistry and Materials Science, Hengyang Normal University Department of Chemistry and Materials Science, Hengyang Normal University Department of Chemistry and Materials Science, Hengyang Normal University College of Environmental Science and Engineering, Hunan University
  • Received:2012-03-07 Revised:2012-08-07 Online:2012-10-20 Published:2012-10-20
  • Contact: TANG Wen-qing

柠檬酸改性柚子皮纤维素对废水中铜离子的吸附

唐文清 曾荣英 冯泳兰 伍伟 王雪新 李小明   

  1. 衡阳师范学院化学与材料科学系 衡阳师范学院化学与材料科学系 衡阳师范学院化学与材料科学系 衡阳师范学院化学与材料科学系 衡阳师范学院化学与材料科学系 湖南大学环境科学与工程学院
  • 通讯作者: 唐文清

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Abstract: Adsorption of Cu2+ on the cellulose citric acid (Cell-CA) as the adsorbent was investigated by batch experiments. Key physico-chemical parameters such as the initial concentration of solution, particle size, pH value, contact time, and temperature of the solution were examined. The experimental results showed that the highest removal rate of Cu2+ could reach 92.4% and adsorption capacity was up to 18.54 mg/g at pH 5.5. The data were correlated by Freundlich and Langmuir equations under different temperatures. The Langmuir equation accorded with the static adsorption characteristic of adsorbent. The kinetic parameters of adsorption of Cu2+ on Cell-CA were determined. The pseudo-first order and pseudo-second order kinetic models best described the adsorption of Cu2+. The thermodynamic parameters indicated that the adsorption of Cu2+ on Cell-CA was endothermic.

Key words: cellulose citric acid, adsorption, Cu2+, thermodynamic, kinetics

摘要： 采用静态平衡吸附法用柠檬酸纤维素(Cell-CA)吸附废水中Cu2+，考察了溶液的初始浓度、吸附剂颗粒大小、pH值、吸附时间和温度对吸附的影响，分析了吸附过程的热力学、动力学和等温吸附规律. 结果表明，在pH值为5.5时Cell-CA对废水中Cu2+的吸附率为92.7%，吸附容量高达18.54 mg/g；对不同温度下的吸附等温线采用Freundlich和Langmuir方程进行拟合，结果显示Langmuir方程的拟合效果更好. 模拟吸附动力学实验数据符合准一级和准二级动力学模型，Cell-CA对Cu2+的吸附是放热反应.

关键词: 柠檬酸纤维素, 吸附, Cu2+, 热力学, 动力学

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