Journal of Guangxi Normal University(Natural Science Edition) ›› 2020, Vol. 38 ›› Issue (5): 86-94.doi: 10.16088/j.issn.1001-6600.2020.05.011

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Adsorption Properties of PAN-based Weakly Basic Ion Exchange Fiber for Zn2+

WANG Nana1,2, ZHANG Xiang3*   

  1. 1. Henan Pingdingshan Ecological Environment Monitoring Center, Pingdingshan Henan 467400, China;
    2. Advanced Separation Technology Laboratory, Zhengzhou University, Zhengzhou Henan 450001, China;
    3. School of Chemical Engmeering and Energy, Zhengzhou University, Zhengzhou Henan 450001, China
  • Received:2019-04-19 Online:2020-09-25 Published:2020-10-09

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Abstract: In this paper, a kind of PAN-based weak alkaline ion exchange fiber was synthesized and was used as adsorbent for Zn2+. The effects of pH, temperature, adsorption time and concentration of Zn2+ solution on the adsorption performance of modified fibers were investigated. The optimal concentration and volume of hydrochloric acid for desorption the fiber were discussed. The results showed that the adsorption performance of the modified fiber was better as the pH increases within the range of pH＝2~6; The adsorption reached a dynamic equilibrium after 60 min of reaction at 303 K, and the maximum saturated adsorption amount was 155.33 mg/g. The temperature had little effect on the adsorption performance of the fiber. The regeneration of the fiber worked best with 5 mL of 1.2 mol/L hydrochloric acid solution, and the modified fiber had good chemical stability. The process of adsorbing Zn2+ by modified fiber conformed to the Langmuir isotherm adsorption model and belonged to monolayer adsorption.

Key words: PAN-based, weak alkaline ion-exchange fiber, Zn2+, adsorption property, isotherm adsorption models

CLC Number: 

  • TQ342.84
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