Preparation of a poly(acrylic acid) based hydrogel with fast adsorption rate and high adsorption capacity for the removal of cationic dyes

Zhenyu Yuan, Jie Wang, Yiming Wang, Qian Liu, Yujie Zhong, Yu Wang, Li Li, Stephen F. Lincoln, Xuhong Guo

Research output: Contribution to journalArticleScientificpeer-review

20 Citations (Scopus)
49 Downloads (Pure)

Abstract

A biocompatible Dex-MA/PAA hydrogel was prepared through copolymerization of glycidyl methacrylate substituted dextran (Dex-MA) with acrylic acid (AA), which was applied as the adsorbent to remove cationic dyes from aqueous solutions. Dex-MA/PAA hydrogel presented a fast adsorption rate and the removal efficiency of Methylene Blue (MB) and Crystal Violet (CV) reached 93.9% and 86.4%, respectively within one minute at an initial concentration of 50 mg L-1. The adsorption equilibrium data fitted the Sips isotherm model well with high adsorption capacities of 1994 mg g-1 for MB and 2390 mg g-1 for CV. Besides, dye adsorption occurred efficiently over the pH range 3-10 and the temperature range 20-60 °C. Moreover, the removal efficiencies for MB and CV were still >95% even after five adsorption/desorption cycles which indicates the robust nature of the Dex-MA/PAA hydrogel and its potential as an eco-friendly adsorbent for water treatment.

Original languageEnglish
Pages (from-to)21075-21085
Number of pages11
JournalRSC Advances
Volume9
Issue number37
DOIs
Publication statusPublished - 2019

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