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Hamri S, Bouchaour T, Lerari D, Bouberka Z, Supiot P, Maschke U. Cleaning of Wastewater Using Crosslinked Poly(Acrylamide-co-Acrylic Acid) Hydrogels: Analysis of Rotatable Bonds, Binding Energy and Hydrogen Bonding. Gels 2022; 8:gels8030156. [PMID: 35323269 PMCID: PMC8952127 DOI: 10.3390/gels8030156] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 02/28/2022] [Accepted: 03/01/2022] [Indexed: 02/01/2023] Open
Abstract
The discharge of untreated wastewater, often contaminated by harmful substances, such as industrially used dyes, can provoke environmental and health risks. Among various techniques, the adsorption of dyes, using three-dimensional (3D) networks consisting of hydrophilic polymers (hydrogels), represents a low-cost, clean, and efficient remediation method. Three industrially used dyes, Methylene Blue, Eosin, and Rose Bengal, were selected as models of pollutants. Poly(acrylamide) (poly(AM)) and poly(acrylamide-co-acrylic acid) (poly(AM-co-AA)) networks were chosen as adsorbent materials (hydrogels). These polymers were synthesized by crosslinking the photopolymerization of their respective monomer(s) in an aqueous medium under exposure to UV light. Experimental adsorption measurements revealed substantially higher dye uptakes for poly(AM-co-AA) compared to poly(AM) hydrogels. In this report, a theoretical model based on docking simulations was applied to analyze the conformation of polymers and pollutants in order to investigate some aspects of the adsorption process. In particular, hydrogen and halogen interactions were studied. The presence of strong hydrogen bonding plays a crucial role in the retention of dyes, whereas halogen bonding has a small or negligible effect on adsorption. An evaluation of binding energies allowed us to obtain information about the degree of affinity between polymers and dyes. The number of rotatable bonds in the copolymer exceeds those of poly(AM),meaning that poly(AM-co-AA) is revealed to be more suitable for obtaining a high retention rate for pollutants.
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Affiliation(s)
- Salah Hamri
- Center for Scientific and Technical Research in Physico-Chemical Analysis (CRAPC), BP 384, Industrial Zone, BouIsmaïl 42004, Algeria; (S.H.); (D.L.)
- Macromolecular Research Laboratory (LRM), Faculty of Sciences, Abou Bekr Belkaid University, BP 119, Tlemcen 13000, Algeria;
| | - Tewfik Bouchaour
- Macromolecular Research Laboratory (LRM), Faculty of Sciences, Abou Bekr Belkaid University, BP 119, Tlemcen 13000, Algeria;
| | - Djahida Lerari
- Center for Scientific and Technical Research in Physico-Chemical Analysis (CRAPC), BP 384, Industrial Zone, BouIsmaïl 42004, Algeria; (S.H.); (D.L.)
| | - Zohra Bouberka
- Laboratoire Physico-Chimie des Matériaux-Catalyse et Environnement (LPCMCE), Université des Sciences et de la Technologie d’Oran Mohamed Boudiaf (USTOMB), Oran 31000, Algeria;
| | - Philippe Supiot
- CNRS, INRAE, Centrale Lille, UMR 8207—UMET—Unité Matériaux et Transformations, Université de Lille, 59000 Lille, France;
| | - Ulrich Maschke
- CNRS, INRAE, Centrale Lille, UMR 8207—UMET—Unité Matériaux et Transformations, Université de Lille, 59000 Lille, France;
- Correspondence:
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Younis AM, El‐Gamil MM, Rakha TH, Abu El‐Reash GM. Iron(III), copper(II), cadmium(II), and mercury(II) complexes of isatin carbohydrazone Schiff base ligand (H
3
L): Synthesis, characterization, X‐ray diffraction, cyclic voltammetry, fluorescence, density functional theory, biological activity, and molecular docking studies. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6250] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Adel M. Younis
- Chemistry Department, Faculty of Science Mansoura University PO Box 70 Mansoura Egypt
| | - Mohammed M. El‐Gamil
- Department of Toxic and Narcotic Drug, Forensic Medicine, Mansoura Laboratory, Medico‐Legal Organization Ministry of Justice Mansoura Egypt
| | - Tawfik H. Rakha
- Chemistry Department, Faculty of Science Mansoura University PO Box 70 Mansoura Egypt
| | - Gaber M. Abu El‐Reash
- Chemistry Department, Faculty of Science Mansoura University PO Box 70 Mansoura Egypt
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