Advanced Pyrene Copolymer/rGO Hydrogels for Efficient Congo Red Removal from Aqueous Systems-Reference-Cited by-同舟云学术

Advanced Pyrene Copolymer/rGO Hydrogels for Efficient Congo Red Removal from Aqueous Systems

Published:2024-05-07 Issue:18 Volume:9 Page:
ISSN:2365-6549
Container-title:ChemistrySelect
language:en
Short-container-title:ChemistrySelect

Author:

Ahmed Soleen S.¹^ORCID,Alwattar Aula A.²³^ORCID,Ismael Shireen O.¹^ORCID,Zaki Elsayed⁴^ORCID,Hussein Modather⁵⁶^ORCID,Casson Alexander J.⁷^ORCID,Quayle Peter²^ORCID,Haddad Athir M.³^ORCID

Affiliation:

1. Chemistry Department, College of Science University of Duhok Duhok Iraq

2. Department of Chemistry The University of Manchester Manchester M13 9PL UK

3. Department of Chemistry, College of Science University of Basrah Basrah Iraq

4. Egyptian Petroleum Research Institute Nasr City Cairo 11727 Egypt

5. Chemistry Department, College of Science Jouf University, P.O. Box 2014 Sakaka Aljouf KSA

6. Chemistry Department, Faculty of Science Al-Azhar University Asyut Branch Asyut 71524 Egypt

7. Department of Electrical and Electronics Engineering The University of Manchester Manchester M13 9PL UK

Abstract

AbstractThis study investigates the use of hydrogel semi‐interpenetrating polymer networks (semi IPN) as efficient adsorbents for removing the dye congo red (CR) from aqueous solutions. Specifically, three hydrogel semi IPN, namely AH0–AH2, were synthesized through redox polymerization of acrylamide, polyethylenimine, polyhydroxylethylmethacrylate and (pyren‐1‐yl)methyl methacrylate/2‐acrylamido‐2‐methylpropane‐1‐sulfonic acid copolymer (pyrene−AMPS) using a reduced graphene oxide (RGO)‐N,N’‐methylene‐bis(acrylamide) (MBA)‐based crosslinker (GABC). Results indicated that these hydrogels were efficient in removing CR at pH 6.73, with the adsorption behaviour conforming to the Langmuir isotherm. This suggests a monolayer adsorption pattern, indicating a chemical nature. Thermodynamic analysis supports the practical feasibility of this process. The negative Gibbs free energy of adsorption (ΔG̊) indicates that adsorption is spontaneous and favorable. Conversely, the positive standard entropy of adsorption (ΔS̊) suggests an increase in molecular randomness during the process. Additionally, the standard enthalpy change (ΔH̊) suggests an endothermic activation energy for the binding process. Response Surface Methodology (RSM), utilizing four variables was employed to optimize the removal of CR. The model demonstrated high R2‐values and strong agreement between experimental and projected results, affirming its reliability. AH1 and AH2 showed significant efficacy in removing CR dye from aqueous solutions, underscoring their potential application in wastewater remediation.

Funder

Engineering and Physical Sciences Research Council

Publisher

Wiley

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