Adsorption and Desorption Behavior of Tannic Acid in Aqueous Solution on Polyaniline Adsorbent

WANG Jiahong; JI Yanfen; DING Shaolan; MA Hongrui; HAN Xiaojing

doi:10.1016/S1004-9541(13)60516-9

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Adsorption and Desorption Behavior of Tannic Acid in Aqueous Solution on Polyaniline Adsorbent

分离科学与工程 | Updated：2026-01-06

- Adsorption and Desorption Behavior of Tannic Acid in Aqueous Solution on Polyaniline Adsorbent
- Chinese Journal of Chemical Engineering Issue 6, Pages: 594-5991004-954160516-9(2013)
- Affiliations：
  
  1. College of Resource and Environment, Shaanxi University of Science & Technology,Xi’an,China,710021
  2. 2 Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, College of Chemistry and Chemical Engineering, Shaanxi University of Science & Technology,Xi’an,China,710021
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(13)60516-9
  CLC：
- Published：2013
- Accepted：
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WANG Jiahong, JI Yanfen, DING Shaolan, et al. Adsorption and Desorption Behavior of Tannic Acid in Aqueous Solution on Polyaniline Adsorbent[J]. Chinese Journal of Chemical Engineering, 2013, (6): 594-5991004-954160516-9.
DOI：

WANG Jiahong, JI Yanfen, DING Shaolan, et al. Adsorption and Desorption Behavior of Tannic Acid in Aqueous Solution on Polyaniline Adsorbent[J]. Chinese Journal of Chemical Engineering, 2013, (6): 594-5991004-954160516-9. DOI： 10.1016/S1004-9541(13)60516-9.

摘要

Abstract

Tannic acid is generally considered as one of polyphenolic pollutants

which may cause severe threats to the environment. In this study

polyaniline adsorbent was synthesized by chemical oxidation to remove tannic acid in aqueous solutions. The adsorption amount of tannic acid varied greatly with pH of solution and strong adsorption was at pH 5.8-6.7. Coexisting cations

such as Na

and Ca

can enhance the adsorption of tannic acid on polyaniline

which may be contributed to the electrostatic interaction between tannic acid and polyaniline. The adsorption process could be well described by Langmuir model and the maximum adsorption capacity was 117.65 mg·g

-1

at 35℃ and pH 6.0. The thermodynamic parameters calculated from the adsorption isotherms indicate that the adsorption of tannic acid is spontaneous and endothermic process. The polyaniline saturated with tannic acid can be desorbed in alkaline solution and regenerated adsorbent can be used repeatedly with high adsorption capacity

which implies that polyaniline adsorbents have a great potential in water purification for the removal of tannic acid.

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