Removal of chromium (VI) from aqueous solutions using quaternized chitosan microspheres

Chao Hua; Runhu Zhang; Fang Bai; Ping Lu; Xiangfeng Liang

doi:10.1016/j.cjche.2016.08.024

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Removal of chromium (VI) from aqueous solutions using quaternized chitosan microspheres

Selected Papers from the International Chemical Separation Technology Conference (ICSTC) | Updated：2026-01-06

- Removal of chromium (VI) from aqueous solutions using quaternized chitosan microspheres
- Chinese Journal of Chemical Engineering Vol. 25, Issue 2, Pages: 153-158(2017)
- Affiliations：
  
  1. Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences,Beijing,China,100190
  2. Hebei Collaborative Innovation Center of Modern Marine Chemical Technology,Tianjin,China,300130
  3. Department of Chemical Engineering, Kunming Metallurgy College,Kunming,China,650033
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.08.024
  CLC：
- Published：2017
- Accepted：
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Chao Hua, Runhu Zhang, Fang Bai, Ping Lu, Xiangfeng Liang. Removal of chromium (VI) from aqueous solutions using quaternized chitosan microspheres[J]. , 2017, 25(2): 153-158.
DOI：

Chao Hua, Runhu Zhang, Fang Bai, Ping Lu, Xiangfeng Liang. Removal of chromium (VI) from aqueous solutions using quaternized chitosan microspheres[J]. , 2017, 25(2): 153-158. DOI： 10.1016/j.cjche.2016.08.024.

摘要

Abstract

In this study

quaternized chitosan microspheres (QCMS) were prepared and its Cr(VI) removal potential was investigated. Batch experiments were conducted to examine kinetics

adsorption isotherm

pH effect

and thermodynamic parameters. Equilibrium was attained within 50 min and maximum removal of 97.34% was achieved under the optimum conditions at pH 5. Adsorption data for Cr (VI) uptake by the QCMS were analyzed according to Langmuir

Freundlich

and Temkin adsorption models. The maximum uptake of Cr(VI) was 39.1 mg·g

-1

. Thermodynamic parameters for the adsorption system were determinated at 293 K

303 K

313 K and 323 K. (Δ

°=16.08 kJ·mol

-1

;Δ

°=-5.84 to -8.08 kJ·mol

-1

and Δ

°=74.81 J·K

-1

·mol

-1

). So the positive values of both Δ

° and Δ

° suggest an endothermic reaction and increase in randomness at the solid-liquid interface during the adsorption.Δ

° values obtainedwere negative indicating a spontaneous adsorption process. The kinetic process was described by a pseudo-second-order rate equation ve

ry well. The results of the present study indicated that the QCMS could be considered as a potential adsorbent for Cr (VI) in aqueous solutions.

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