SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 57 ›› Issue (5): 309-318.DOI: 10.1016/j.cjche.2022.08.002

• Full Length Article • 上一篇    下一篇

One-step crosslinking preparation of tannic acid particles for the adsorption and separation of cationic dyes

Yujia Cui, Zhiqiang Tan, Yanan Wang, Shuxian Shi, Xiaonong Chen   

  1. Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China
  • 收稿日期:2022-05-12 修回日期:2022-08-03 出版日期:2023-05-28 发布日期:2023-07-08
  • 通讯作者: Xiaonong Chen,E-mail:chenxn@mail.buct.edu.cn

One-step crosslinking preparation of tannic acid particles for the adsorption and separation of cationic dyes

Yujia Cui, Zhiqiang Tan, Yanan Wang, Shuxian Shi, Xiaonong Chen   

  1. Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2022-05-12 Revised:2022-08-03 Online:2023-05-28 Published:2023-07-08
  • Contact: Xiaonong Chen,E-mail:chenxn@mail.buct.edu.cn

摘要: In this study, a new tannic acid adsorbent (ethylene glycol diglycidyl ether crosslinked tannic acid, TA-EGDE) for adsorptive removal of dyes from water was prepared using EGDE as a cross-linking agent. The resultant TA-EGDE was in particulate form with rough surface morphology and a diameter ranging from 10 to 30 μm. The adsorption performance of the TA-EGDE was evaluated in a flow-through mode using water samples contaminated with methylene blue (MB) and two-component mixed dyes, respectively. The TA-EGDE provided adsorption capacity up to 721.8 mg·g-1 at 65 ℃ for MB. It showed a high removal efficiency (99%) of MB (50 mg·L–1) from the water sample and could recovery 90% of the adsorbed MB by eluting with acidic ethanol aqueous solution. The excellent adsorption of MB and neutral red on the TA-EGDE may be the result of the synergy of electrostatic interaction and π–π interaction. Furthermore, the TA-EGDE could separate dyes from water samples contaminated with two-component mixed dyes with a separation coefficient ranging from 1.8 to 36.5. The anionic TA-EGDE would be an effective adsorbent to remove and recycle dyes from the contaminated water.

关键词: Tannic acid, Water treatment, Cationic dyes, Adsorption, Recovery, Dyes separation

Abstract: In this study, a new tannic acid adsorbent (ethylene glycol diglycidyl ether crosslinked tannic acid, TA-EGDE) for adsorptive removal of dyes from water was prepared using EGDE as a cross-linking agent. The resultant TA-EGDE was in particulate form with rough surface morphology and a diameter ranging from 10 to 30 μm. The adsorption performance of the TA-EGDE was evaluated in a flow-through mode using water samples contaminated with methylene blue (MB) and two-component mixed dyes, respectively. The TA-EGDE provided adsorption capacity up to 721.8 mg·g-1 at 65 ℃ for MB. It showed a high removal efficiency (99%) of MB (50 mg·L–1) from the water sample and could recovery 90% of the adsorbed MB by eluting with acidic ethanol aqueous solution. The excellent adsorption of MB and neutral red on the TA-EGDE may be the result of the synergy of electrostatic interaction and π–π interaction. Furthermore, the TA-EGDE could separate dyes from water samples contaminated with two-component mixed dyes with a separation coefficient ranging from 1.8 to 36.5. The anionic TA-EGDE would be an effective adsorbent to remove and recycle dyes from the contaminated water.

Key words: Tannic acid, Water treatment, Cationic dyes, Adsorption, Recovery, Dyes separation