Next Article in Journal
Composites of Vegetable Oil-Based Polymers and Carbon Nanomaterials
Next Article in Special Issue
Nanometric Hydroxyapatite Particles as Active Ingredient for Bioinks: A Review
Previous Article in Journal
Aspects of the Synthesis of Poly(styrene-block-isobutylene-block-styrene) by TiCl4-Co-initiated Cationic Polymerization in Open Conditions
 
 
Article

Super-Adsorbent Hydrogels for Removal of Methylene Blue from Aqueous Solution: Dye Adsorption Isotherms, Kinetics, and Thermodynamic Properties

Chemistry, Missouri University of Science and Technology, Rolla, MO 65409, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Leyre Pérez-Álvarez
Macromol 2021, 1(4), 256-275; https://doi.org/10.3390/macromol1040018
Received: 7 September 2021 / Revised: 2 November 2021 / Accepted: 11 November 2021 / Published: 19 November 2021
(This article belongs to the Special Issue Colloids and Interfaces)
Removal of dyes through adsorption from wastewater has gained substantial interest in recent years, especially in development of hydrogel based adsorbents, owing to their easy use and economical nature. The aim of the present study was to design a super-adsorbent hydrogel based on sodium styrenesulfonate (NaSS) monomer for removal of dyes like methylene blue (MB). NaSS displays both an aromatic ring and strongly ionic group in its monomer structure that can enhance adsorption capacity. Poly(sodium styrenesulfonate-co-dimethylacrylamide) hydrogels were prepared by solution free radical polymerization using gelatin methacryloyl (GelMA) as crosslinker, creating a highly porous, three-dimensionally crosslinked polymer network contributing to higher swelling ratios of up to 27,500%. These super-adsorbent hydrogels exhibited high adsorption capacity of 1270 mg/g for MB adsorption with above 98% removal efficiency. This is the first report for such a high adsorption capacity for dye absorbance for NaSS-based hydrogels. Additionally, the adsorption kinetics using a pseudo-first-order and the Freundlich adsorption isotherm models for multilayer, heterogeneous adsorption processes has been reported. The adsorbents’ reusability was confirmed through 4 repeated cycles of desorption-adsorption. The results discussed herein illustrate that NaSS based chemistries can be used as an efficient option for removal of organic dyes from contaminated wastewater. View Full-Text
Keywords: super-adsorbent hydrogels; methylene blue; adsorption; kinetic; isotherm super-adsorbent hydrogels; methylene blue; adsorption; kinetic; isotherm
Show Figures

Graphical abstract

MDPI and ACS Style

Salunkhe, B.; Schuman, T.P. Super-Adsorbent Hydrogels for Removal of Methylene Blue from Aqueous Solution: Dye Adsorption Isotherms, Kinetics, and Thermodynamic Properties. Macromol 2021, 1, 256-275. https://doi.org/10.3390/macromol1040018

AMA Style

Salunkhe B, Schuman TP. Super-Adsorbent Hydrogels for Removal of Methylene Blue from Aqueous Solution: Dye Adsorption Isotherms, Kinetics, and Thermodynamic Properties. Macromol. 2021; 1(4):256-275. https://doi.org/10.3390/macromol1040018

Chicago/Turabian Style

Salunkhe, Buddhabhushan, and Thomas P. Schuman. 2021. "Super-Adsorbent Hydrogels for Removal of Methylene Blue from Aqueous Solution: Dye Adsorption Isotherms, Kinetics, and Thermodynamic Properties" Macromol 1, no. 4: 256-275. https://doi.org/10.3390/macromol1040018

Find Other Styles

Article Access Map by Country/Region

1
Back to TopTop