Encapsulation of Saccharomyces pastorianus Residual Biomass in Calcium Alginate Matrix with Insights in Ethacridine Lactate Biosorption.

Autor: Rusu L; Faculty of Engineering, 'Vasile Alecsandri' University of Bacau, 157 Calea Mărăşeşti, 600115 Bacau, Romania., Grigoraș CG; Faculty of Engineering, 'Vasile Alecsandri' University of Bacau, 157 Calea Mărăşeşti, 600115 Bacau, Romania., Simion AI; Faculty of Engineering, 'Vasile Alecsandri' University of Bacau, 157 Calea Mărăşeşti, 600115 Bacau, Romania., Suceveanu EM; Faculty of Engineering, 'Vasile Alecsandri' University of Bacau, 157 Calea Mărăşeşti, 600115 Bacau, Romania., Blaga AC; Faculty of Chemical Engineering and Environmental Protection 'Cristofor Simionescu', 'Gheorghe Asachi' Technical University from Iasi, 71 A Mangeron Blvd., 700050 Iasi, Romania., Harja M; Faculty of Chemical Engineering and Environmental Protection 'Cristofor Simionescu', 'Gheorghe Asachi' Technical University from Iasi, 71 A Mangeron Blvd., 700050 Iasi, Romania.
Jazyk: angličtina
Zdroj: Polymers [Polymers (Basel)] 2022 Jan 01; Vol. 14 (1). Date of Electronic Publication: 2022 Jan 01.
DOI: 10.3390/polym14010170
Abstrakt: Pharmaceuticals are recognized as emerging water microcontaminants that have been reported in several aquatic environments worldwide; therefore, the elimination of these pollutants is a global challenge. This study aimed to develop a biosorbent based on Saccharomyces pastorianus residual biomass encapsulated in a calcium alginate matrix and to evaluate its biosorption performance to remove Ethacridine Lactate (EL) from aqueous solutions. Firstly, the synthesis and characterization of biosorbent has been carried out. Then, the impact of main parameters on biosorption process were investigated by batch experiments. Finally, the kinetics behavior and equilibrium isotherms were evaluated. The resulted beads have an irregular and elongated shape with about 1.89 mm ± 0.13 mm in size with a homogeneous structure. The best removal efficiency for EL of over 85% was obtained at acidic pH 2 and 25 °C for 50 mg/L initial concentration and 2 g/L biosorbent dose. The pseudo-second-order and intraparticle diffusion kinetics describe the biosorption process. The maximum calculated biosorption capacity was 21.39 mg/g similar to that recorded experimentally. The equilibrium biosorption data were a good fit for Freundlich and Dubinin-Radushkevich isotherms. Our findings reveal that the low cost and eco-friendly obtained biosorbent can be easily synthesized and suitable to remove Ethacridine Lactate from water matrices.
Databáze: MEDLINE
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