Collagen-Based Hydrogel Nanocomposite as Adsorbent for Methylene Blue and Crystal Violet Removal from Aqueous Solution: Isotherm, Kinetic, and Thermodynamic Studies.

Autor: Hooshvar, Mahdieh1 (AUTHOR), Bagheri Marandi, Gholam1 (AUTHOR) marandi@kiau.ac.ir, Taghvay Nakhjiri, Mahdi1 (AUTHOR)
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Zdroj: Water, Air & Soil Pollution. Feb2024, Vol. 235 Issue 2, p1-21. 21p.
Abstrakt: This research was aimed to synthesize montmorillonite nanosheet/poly(acrylamide-co-2-acrylamide-2-methylenepropane sulfonic acid-co-1-vinyl-2-pyrrolidone)/collagen hydrogel under the influence of ultrasound waves for dye adsorption. Montmorillonite nanosheet were compounded with hydrogel matrix through hydrogen bond or ionic interaction to form a 3D network scaffold, reaching free entry and fast adsorption for dye molecules. The experimental study confirmed that the optimal pH to adsorb both methylene blue (MB) and crystal violet (CV) was pH 7. Significantly, the synthesized composite exposed a promising adsorption capacity towards MB and CV with maximum adsorption capacity of 321 and 226 mg/g for MB and CV, respectively. Also, the kinetic and isotherm research described that the adsorption of cationic dyes best fitted with Temkin and pseudo-second order models, respectively. Also, the advanced adsorbent conserved suitable adsorption features by satisfactory removal efficacy exceeding 64% and 61% after recycling for four consecutive cycles. The endothermic nature and also spontaneous of MB and CV adsorption phenomenon were examined by adsorption thermodynamics. Consequently, the prepared hydrogel is an ideal adsorbent for MB and CV adsorption from wastewater. [ABSTRACT FROM AUTHOR]
Databáze: GreenFILE
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