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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (5): 355-360.    下一篇

研究论文

D301R树脂对Keggin型铁取代杂多阴离子的吸附性能研究

华英杰a 王崇太*,a,b 杨 雪a 童叶翔c 何猛雄a

  

  1. (a海南师范大学化学与化工学院 海口 571158)
    (b海南师范大学海南省热带药用植物化学重点实验室 海口 571158)
    (c中山大学化学与化工学院 广州 510275)

  • 投稿日期:2008-07-25 修回日期:2008-10-15 发布日期:2009-03-14
  • 通讯作者: 王崇太

Adsorption Properties of Keggin-type Fe(III)-substituted Heteropolyanion by D301R Resin

Hua, Yingjie a Wang, Chongtai *,a,b Yang, Xue a Tong ,Yexiang c He, Mengxiong a   

  1. (a School of Chemistry and Chemical Engineering, Haikou 571158)
    (b Key Lab of Tropical Medicinal Plant Chemistry of Hainan Province, Hainan Normal University, Haikou 571158)
    (c School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275)
  • Received:2008-07-25 Revised:2008-10-15 Published:2009-03-14
  • Contact: Wang, Chongtai

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1625

被引次数

59 | 9

详细研究了D301R弱碱性阴离子交换树脂对Keggin型铁取代杂多阴离子PW11O39Fe(III)(H2O)4－ (PW11Fe)的吸附作用, 考察了不同pH和温度对吸附量和吸附速率的影响, 测定了不同温度下吸附的动力学曲线和吸附等温线, 提出吸附动力学模型和计算了吸附的热力学函数, 结果表明, 在pH 2～8的范围内, PW11Fe的吸附量随溶液pH值的升高而增加, 随溶液温度的升高而降低; 吸附动力学符合表面过程控制的准二级反应模型, 其速率常数k2在298 K时为 9.33×10－4 g•mg－1•min－1, 并随温度的升高而减小. 吸附等温线符合Freundlich吸附模型, 吸附热约为40 kJ•mol－1, 因此, 吸附为物理吸附.

关键词: 阴离子交换树脂, 铁取代杂多阴离子, 吸附动力学, 吸附等温线

The adsorption properties of the D301R resin towards Fe(III) substituted heteropolyanion PW11O39Fe(III)(H2O)4－ (PW11Fe) and impacts of pH and temperature on the adsorption were investigated in detail. The adsorption kinetic curves and adsorption isotherm curves were also determined at different temperature. It was found that the adsorption capacities of PW11Fe on the resin increased with pH increase in the aqueous solution from 2 to 8, and decreased with the increase of temperature. The adsorption kinetics follows the pseudo-second-order model controlled by a surface process. The rate constant k2 is 9.33×10－4 g•mg－1•min－1, which decreased with the increase of temperature. The adsorption isotherm curve is consistant with Freundlich isotherms and the adsorption enthalpy calculated is about 40 kJ•mol－1, indicating a physical adsorption process.

Key words: anion exchange resin, Fe(III)-substituted heteropolyanion, adsorption kinetics, adsorption isotherm