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Bagdat S, Tokay F, Demirci S, Yilmaz S, Sahiner N. Removal of Cd(II), Co(II), Cr(III), Ni(II), Pb(II) and Zn(II) ions from wastewater using polyethyleneimine (PEI) cryogels. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 329:117002. [PMID: 36527951 DOI: 10.1016/j.jenvman.2022.117002] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 11/25/2022] [Accepted: 12/06/2022] [Indexed: 06/17/2023]
Abstract
The removal of the target analytes, Cd(II), Co(II), Cr(III), Ni(II), Pb(II), and Zn(II) from contaminated waters was achieved using super porous polyethyleneimine (PEI) cryogels as adsorbent. The optimum values of the sample pH and contact time were determined as 4.0 and 90 min, respectively, for the removal of the analytes. The adsorption capacities of the sorbent were between 19.88 and 24.39 mgg-1 from 10 mL of 50 mgL-1 target metal ion solutions. The sorption kinetics of metal ions were fitted with the pseudo-second-order model. The adsorption isotherms of the target analytes into PEI cryogel were well-fitted to the Langmuir isotherm model as expected from the material homogeneity. The selectivity of the PEI cryogel in the presence of Na+, Ca2+, Mg2+, NO3-, K+ and Cl- ions even at high concentrations was tested, and the tolerance limits were satisfactory enough, e.g., the adsorption of the target analytes was even not affected in the presence of 2000 mgL-1 Ca2+, K+, Na+, Cl- and 5000 mgL-1 NO3- ions. The PEI cryogels were successfully utilized in different industrial wastewater samples that were spiked with a known amount of analytes. The removal of the analytes from wastewater samples was in the following ranges 91.94-99.86% for Cd(II), 89.59-99.89% for Co(II), 80.35-99.76% for Cr(III), 92.02-99.84% for Ni(II), 83.28-99.86% for Pb(II), and 82.94-98.24% for Zn(II), respectively. The presented novel removal strategy offers a selective, efficient, and easy application for target metal ions from industrial wastewater samples.
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Affiliation(s)
- Sema Bagdat
- Balıkesir University, Faculty of Science, Chemistry Department, 10145, Balıkesir, Turkey
| | - Feyzullah Tokay
- Balıkesir University, Faculty of Science, Chemistry Department, 10145, Balıkesir, Turkey
| | - Sahin Demirci
- Canakkale Onsekiz Mart University, Faculty of Science, Department of Chemistry, Terzioglu Campus, Canakkale, 17100, Turkey; Nanoscience and Technology Research and Application Center, Canakkale Onsekiz Mart University Terzioglu Campus, 17100, Canakkale, Turkey
| | - Selehattin Yilmaz
- Canakkale Onsekiz Mart University, Faculty of Science, Department of Chemistry, Terzioglu Campus, Canakkale, 17100, Turkey
| | - Nurettin Sahiner
- Canakkale Onsekiz Mart University, Faculty of Science, Department of Chemistry, Terzioglu Campus, Canakkale, 17100, Turkey; Nanoscience and Technology Research and Application Center, Canakkale Onsekiz Mart University Terzioglu Campus, 17100, Canakkale, Turkey; Department of Chemical and Biomolecular Engineering, University of South Florida, Tampa, FL, 33620, USA.
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Altunbaş C, Aslan A, Kuşat K, Sahiner M, Akgöl S, Sahiner N. Synthesis and Characterization of a New Cryogel Matrix for Covalent Immobilization of Catalase. Gels 2022; 8:gels8080501. [PMID: 36005102 PMCID: PMC9407055 DOI: 10.3390/gels8080501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 08/07/2022] [Accepted: 08/11/2022] [Indexed: 11/24/2022] Open
Abstract
The advantages of cryogels for enzyme immobilization applications include their mechanical and chemical robustness, ease of production, superior porosity, and low cost. Currently, many researchers are exploring porous material-based systems for enzyme immobilization that are more efficient and economically viable. Here, poly(2-Hydroxyethyl methacrylate-co-allyl glycidyl ether) (p(HEMA-co-AGE)) cryogel matrices were synthesized via the free radical cryopolymerization method to be employed as the support material. For the immobilization of the catalase enzyme onto the p(HEMA-co-AGE) cryogel matrix (catalase@p(HEMA-co-AGE), the best possible reaction conditions were determined by altering parameters such as pH, catalase initial concentration, and flow rate. The maximum catalase immobilization amount onto the p(HEMA-co-AGE) cryogel was found to be 48 mg/g cryogel. To determine the advantages of the cryogel matrix, e.g., the stability and reusability of the cryogel matrix, the adsorption–desorption cycles for the catalase enzyme were repeated five times using the same cryogel matrix. At the end of the reusability tests, it was found that the cryogel was very stable and maintained its adsorption capacity with the recovery ratio of 93.8 ± 1.2%. Therefore, the p(HEMA-co-AGE) cryogel matrix affords repeated useability, e.g., up to five times, without decreasing its catalase binding capacities significantly and has promising potential for many industrial applications. Cryogels offer clear distinctive advantages over common materials, e.g., micro/nano particles, hydrogels, films, and composites for these applications. At present, many researchers are working on the design of more effective and economically feasible, porous material-based systems for enzyme immobilization
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Affiliation(s)
- Canan Altunbaş
- Department of Biochemistry, Faculty of Science, Ege University, Izmir 35100, Turkey
| | - Ahmet Aslan
- Department of Leather Engineering, Faculty of Engineering, Ege University, Izmir 35100, Turkey
| | - Kevser Kuşat
- Department of Chemistry, Faculty of Science, Dokuz Eylul University, Izmir 35390, Turkey
| | - Mehtap Sahiner
- Bioengineering Department, Faculty of Engineering, Canakkale Onsekiz Mart University, Terzioglu Campus, Canakkale 17100, Turkey
| | - Sinan Akgöl
- Department of Biochemistry, Faculty of Science, Ege University, Izmir 35100, Turkey
- Correspondence: (S.A.); or (N.S.)
| | - Nurettin Sahiner
- Department of Chemistry, Faculty of Sciences & Arts, Nanoscience and Technology Research and Application Center (NANORAC), Canakkale Onsekiz Mart University, Terzioglu Campus, Canakkale 17100, Turkey
- Materials Science and Engineering Program, Department of Chemical & Biomedical Engineering, University of South Florida, Tampa, FL 33620, USA
- Department of Ophthalmology, University of South Florida, Tampa, FL 33620, USA
- Correspondence: (S.A.); or (N.S.)
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Idumah CI. Recently emerging advancements in polymeric cryogel nanostructures and biomedical applications. INT J POLYM MATER PO 2022. [DOI: 10.1080/00914037.2022.2097678] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Christopher Igwe Idumah
- Department of Polymer Engineering, Faculty of Engineering, Nnamdi Azikiwe University Awka, Awka, Nigeria
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