Adsorption Properties of KegginType Cr(III) Substituted Heteropolytungstates on the D301R Resin

HUA Yingjie; SHU  Huoming; HUA Shuyan; WANG Chongtai; 

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Adsorption Properties of KegginType Cr(III) Substituted Heteropolytungstates on the D301R Resin

更新时间：2023-12-11

- Adsorption Properties of KegginType Cr(III) Substituted Heteropolytungstates on the D301R Resin
- Acta Scientiarum Naturalium Universitatis SunYatseni Vol. 49, Issue 1, Pages: 67-71(2010)
- 作者机构：
  
  1. ．海南师范大学化学与化工学院,海南,海口,571158
  2. ．琼台师范学院,海南,海口,571158
  3. 3．海南省热带药用植物化学重点实验室,海南,海口,571158
  4. 4．中山大学化学与化学工程学院,广东,广州,510275
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2010，
  
  Published Online：25 January 2010，
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HUA Yingjie, SHU Huoming, HUA Shuyan, et al. Adsorption Properties of KegginType Cr(III) Substituted Heteropolytungstates on the D301R Resin. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 49(1):67-71(2010)
DOI：

HUA Yingjie, SHU Huoming, HUA Shuyan, et al. Adsorption Properties of KegginType Cr(III) Substituted Heteropolytungstates on the D301R Resin. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 49(1):67-71(2010) DOI：

摘要

详细研究了Keggin型铬取代杂多阴离子PW 11O 39Cr(III)(H

 (PW 11 Cr)在D301R弱碱性阴离子交换树脂上的吸附行为，考察了不同pH和温度对吸附容量和吸附速率的影响，根据测定的吸附动力学曲线和吸附等温线，提出了吸附所遵从的热力学和动力学模型，并计算了相应的吸附热力学函数和速率常数。结果表明，在PW 11 Cr稳定存在的pH范围内，PW 11 Cr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吸附模型，吸附速率常数k2在298 K时为154×10

-3

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-37 kJ·mol

-1

，为物理吸附。

Abstract

The adsorption behaviors of Cr(III)substituted heteropolyanion PW

O

Cr(III)(H

 (PW

Cr) on the D301R resin were investigated. Influences of pH and temperature upon PW

Cr adsorption capacity and adsorption rate were also examined

respectively. The adsorption thermodynamic and kinetic equations were simulated and the corresponding parameters were calculated on the basis of adsorption kinetic curves and adsorption isotherms determined at different temperatures. The results showed that the adsorption capacities of PW

Cr on the resin increased with pH increasing from 2 to 8 in the aqueous solution

and decreased with the increase of temperature. The adsorption kinetics followed the pseudosecondorder regime controlled by a surface process. The rate constant k 2 that decreased with the increase of temperature was determined to be 154×10

-3

 g·mg

-1

·min

-1

 at 298 K. The adsorption isotherms were consistent with Freundlich model and the adsorption enthalpy calculated was about -37 kJ·mol

-1



indicating a physical adsorption process.

关键词

阴离子交换树脂D301R铬取代杂多阴离子吸附动力学吸附等温线

Keywords

anion exchange resin D301RCr(III)substituted heteropolyanionadsorption kineticsadsorption isotherms

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