| Autor: |
Rusu L; Department of Chemical and Food Engineering, Faculty of Engineering, 'Vasile Alecsandri' University of Bacău, 157 Calea Mărăşeşti, 600115 Bacău, Romania., Grigoraș CG; Department of Chemical and Food Engineering, Faculty of Engineering, 'Vasile Alecsandri' University of Bacău, 157 Calea Mărăşeşti, 600115 Bacău, Romania., Suceveanu EM; Department of Chemical and Food Engineering, Faculty of Engineering, 'Vasile Alecsandri' University of Bacău, 157 Calea Mărăşeşti, 600115 Bacău, Romania., Simion AI; Department of Chemical and Food Engineering, Faculty of Engineering, 'Vasile Alecsandri' University of Bacău, 157 Calea Mărăşeşti, 600115 Bacău, Romania., Dediu Botezatu AV; Department of Chemistry, Physics and Environment, Faculty of Sciences and Environment, 'Dunărea de Jos' University of Galați, 111 Domnească Street, 800201 Galați, Romania., Istrate B; Mechanical Engineering, Mechatronics and Robotics Department, Mechanical Engineering Faculty, 'Gheorghe Asachi' Technical University of Iași, 43 Mangeron Blvd., 700050 Iași, Romania., Doroftei I; Mechanical Engineering, Mechatronics and Robotics Department, Mechanical Engineering Faculty, 'Gheorghe Asachi' Technical University of Iași, 43 Mangeron Blvd., 700050 Iași, Romania. |
| Abstrakt: |
Pharmaceuticals and dyes are a very important part of the nonbiodegradable or hard biodegradable substances present in wastewater. Microorganisms are already known to be effective biosorbents, but the use of free microbial cells involves difficulties in their separation from effluents and limits their application in wastewater treatment. Thus, this study aimed to develop biosorbents by immobilizing Saccharomyces cerevisiae , Saccharomyces pastorianus and Saccharomyces pastorianus residual biomass on natural polymers (alginate and chitosan) and to evaluate the biosorptive potential for removal of pharmaceuticals and dyes from water. Six types of biosorbents were synthesized and characterized by Scanning Electron Microscopy and Fourier Transform Infrared Spectroscopy techniques and their biosorptive capacities for three drugs (cephalexin, rifampicin, ethacridine lactate) and two dyes (orange II and indigo carmine) were evaluated. The obtained results show that the removal efficiency depends on the polymer type used for the immobilization. In case of alginate the removal efficiency is between 40.05% and 96.41% for drugs and between 27.83% and 58.29% for dyes, while in the case of chitosan it is between 40.83% and 77.92% for drugs and between 17.17% and 44.77% for dyes. In general, the synthesized biosorbents proved to be promising for the removal of drugs and dyes from aqueous solutions. |
