Citation: Ainiwaer·Munire, Ma Yuhua, Zhu Enquan, Su Zhi. Preparation of Sodium Alginate-Zinc Self-Healing Hydrogel and Its Adsorption Properties for Methylene Blue[J]. Chemistry, ;2019, 82(12): 1086-1092. shu

Preparation of Sodium Alginate-Zinc Self-Healing Hydrogel and Its Adsorption Properties for Methylene Blue

College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi 830054

Corresponding author: Ma Yuhua, 15199141253@163.com Su Zhi, suzhixj@sina.com
Received Date: 9 July 2019
Accepted Date: 30 August 2019

Figures(8)

There is an urgent need in the wastewater treatment to prepare adsorbent with multiple stimuli and self-healing properties. Herein, an injectable supramolecular hydrogel was formed by sodium alginate (ALG) and zinc ions (Zn²⁺), and the procedure was very simple (Zn²⁺ dropped directly into ALG) and fast (only 2 s). The as-prepared hydrogel showed multi-stimuli (pH, metal salts, etc.) responsiveness and self-healing properties, which are crucial for highly efficient organic pollution adsorption. Furthermore, the adsorption performance of the hydrogel was investigated with methylene blue (MB) as model dye. The maximum MB adsorption capacity of hydrogel is 5.3 mg/g, and it has good adsorption capacity for low concentration pollutants (removal rate exceeds 80%). The adsorption kinetics were in accordance with the pseudo-second-order kinetic equation, and the Freundlich model could well fit the isothermal adsorption process, indicating that the adsorption of MB by ALG-Zn hydrogel is dominated by multi-layer adsorption. The prepared ALG-Zn supramolecular hydrogel as a popular adsorbent could be applied in wastewater treatment.
- Supramolecular hydrogel,
- Self-healing,
- Multiple stimuli,
- Adsorption
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沈阳化工大学材料科学与工程学院沈阳 110142