Polysaccharides Used in Biosorbents Preparation for Organic Dyes Retaining from Aqueous Media
Natural polymers can themselves be efficient as materials with biosorptive properties but can also be used to transform microbial biomass into an easy-to-handle form, respectively, into biosorbents, through immobilization. The article aims to study biosorbents based on residual microbial biomass (&l...
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MDPI AG
2022-01-01
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author | Daniela Suteu Alexandra Cristina Blaga Carmen Zaharia Ramona Cimpoesu Adrian Cătălin Puițel Ramona-Elena Tataru-Farmus Alexandra Maria Tanasă |
author_facet | Daniela Suteu Alexandra Cristina Blaga Carmen Zaharia Ramona Cimpoesu Adrian Cătălin Puițel Ramona-Elena Tataru-Farmus Alexandra Maria Tanasă |
author_sort | Daniela Suteu |
collection | DOAJ |
description | Natural polymers can themselves be efficient as materials with biosorptive properties but can also be used to transform microbial biomass into an easy-to-handle form, respectively, into biosorbents, through immobilization. The article aims to study biosorbents based on residual microbial biomass (<i>Saccharomyces pastorianus</i> yeast, separated after the brewing process by centrifugation and dried at 80 °C) immobilized in sodium alginate. The biosorptive properties of this type of biosorbent (spherical particles 2 and 4 mm in diameter) were studied for removal of reactive dye Brilliant Red HE-3B (with concentration in range of 16.88–174.08 mg/L) from aqueous media. The paper aims at three aspects: (i) the physico-chemical characterization of the biosorbent (Scanning Electron Microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX) and Fourier Transform Infrared (FTIR) spectra); (ii) the modeling of biosorption data in order to calculate the quantitative characteristic parameters using three equilibrium isotherms (Langmuir, Freundlich, and Dubinin–Radushkevich—DR); and (iii) the evaluation of thermal effect and the possible mechanism of action. The results of the study showed that biosorption capacity evaluated by Langmuir (I) model is 222.22 mg/g (ϕ = 2 mm) and 151.51 mg/g (ϕ = 4 mm) at 30 °C, and the free energy of biosorption (E) is in the range of 8.45–13.608 KJ/mol (from the DR equation). The values of thermodynamic parameters suggested an exothermic process due the negative value of free Gibbs energy (ΔG<sup>0</sup> = −9.031 kJ/mol till −3.776 kJ/mol) and enthalpy (about ΔH<sup>0</sup> = −87.795 KJ/mol). The obtained results underline our finding that the immobilization in sodium alginate of the residual microbial biomass of <i>Saccharomyces pastorianus</i> led to an efficient biosorbent useful in static operating system in the case of effluents with moderate concentrations of organic dyes. |
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spelling | doaj.art-e3ac68513b69453e95840547c67fced82023-11-23T17:36:22ZengMDPI AGPolymers2073-43602022-01-0114358810.3390/polym14030588Polysaccharides Used in Biosorbents Preparation for Organic Dyes Retaining from Aqueous MediaDaniela Suteu0Alexandra Cristina Blaga1Carmen Zaharia2Ramona Cimpoesu3Adrian Cătălin Puițel4Ramona-Elena Tataru-Farmus5Alexandra Maria Tanasă6Department of Organic, Biochemical and Food Engineering, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, ”Gheorghe Asachi” Technical University of Iasi, D. Mangeron Blvd., No. 73A, 700050 Iasi, RomaniaDepartment of Organic, Biochemical and Food Engineering, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, ”Gheorghe Asachi” Technical University of Iasi, D. Mangeron Blvd., No. 73A, 700050 Iasi, RomaniaDepartment of Environmental Engineering and Management, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, ”Gheorghe Asachi” Technical University of Iasi, D. Mangeron Blvd., No. 73A, 700050 Iasi, RomaniaDepartment of Materials Science, “Cristofor Simionescu” Faculty of Materials Science and Engineering, ”Gheorghe Asachi” Technical University of Iasi, D. Mangeron Blvd., No. 73A, 700050 Iasi, RomaniaDepartment of Natural and Synthetic Polymers, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, ”Gheorghe Asachi” Technical University of Iasi, D. Mangeron Blvd., No. 73A, 700050 Iasi, RomaniaDepartment of Chemical Engineering, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, ”Gheorghe Asachi” Technical University of Iasi D. Mangeron Blvd., No. 73A, 700050 Iasi, RomaniaDepartment of Organic, Biochemical and Food Engineering, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, ”Gheorghe Asachi” Technical University of Iasi, D. Mangeron Blvd., No. 73A, 700050 Iasi, RomaniaNatural polymers can themselves be efficient as materials with biosorptive properties but can also be used to transform microbial biomass into an easy-to-handle form, respectively, into biosorbents, through immobilization. The article aims to study biosorbents based on residual microbial biomass (<i>Saccharomyces pastorianus</i> yeast, separated after the brewing process by centrifugation and dried at 80 °C) immobilized in sodium alginate. The biosorptive properties of this type of biosorbent (spherical particles 2 and 4 mm in diameter) were studied for removal of reactive dye Brilliant Red HE-3B (with concentration in range of 16.88–174.08 mg/L) from aqueous media. The paper aims at three aspects: (i) the physico-chemical characterization of the biosorbent (Scanning Electron Microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX) and Fourier Transform Infrared (FTIR) spectra); (ii) the modeling of biosorption data in order to calculate the quantitative characteristic parameters using three equilibrium isotherms (Langmuir, Freundlich, and Dubinin–Radushkevich—DR); and (iii) the evaluation of thermal effect and the possible mechanism of action. The results of the study showed that biosorption capacity evaluated by Langmuir (I) model is 222.22 mg/g (ϕ = 2 mm) and 151.51 mg/g (ϕ = 4 mm) at 30 °C, and the free energy of biosorption (E) is in the range of 8.45–13.608 KJ/mol (from the DR equation). The values of thermodynamic parameters suggested an exothermic process due the negative value of free Gibbs energy (ΔG<sup>0</sup> = −9.031 kJ/mol till −3.776 kJ/mol) and enthalpy (about ΔH<sup>0</sup> = −87.795 KJ/mol). The obtained results underline our finding that the immobilization in sodium alginate of the residual microbial biomass of <i>Saccharomyces pastorianus</i> led to an efficient biosorbent useful in static operating system in the case of effluents with moderate concentrations of organic dyes.https://www.mdpi.com/2073-4360/14/3/588biosorptionpolysaccharides as biosorbentorganic dye<i>Saccharomyces pastorianus</i> immobilizedsodium alginate |
spellingShingle | Daniela Suteu Alexandra Cristina Blaga Carmen Zaharia Ramona Cimpoesu Adrian Cătălin Puițel Ramona-Elena Tataru-Farmus Alexandra Maria Tanasă Polysaccharides Used in Biosorbents Preparation for Organic Dyes Retaining from Aqueous Media Polymers biosorption polysaccharides as biosorbent organic dye <i>Saccharomyces pastorianus</i> immobilized sodium alginate |
title | Polysaccharides Used in Biosorbents Preparation for Organic Dyes Retaining from Aqueous Media |
title_full | Polysaccharides Used in Biosorbents Preparation for Organic Dyes Retaining from Aqueous Media |
title_fullStr | Polysaccharides Used in Biosorbents Preparation for Organic Dyes Retaining from Aqueous Media |
title_full_unstemmed | Polysaccharides Used in Biosorbents Preparation for Organic Dyes Retaining from Aqueous Media |
title_short | Polysaccharides Used in Biosorbents Preparation for Organic Dyes Retaining from Aqueous Media |
title_sort | polysaccharides used in biosorbents preparation for organic dyes retaining from aqueous media |
topic | biosorption polysaccharides as biosorbent organic dye <i>Saccharomyces pastorianus</i> immobilized sodium alginate |
url | https://www.mdpi.com/2073-4360/14/3/588 |
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