Comparison of Rhodotorula sp. and Bacillus megaterium in the removal of cadmium ions from liquid effluents
This study compares the capacity of Rhodotorula sp. and Bacillus megaterium for Cd(II) removal considering the influence of operating parameters (pH, biosorbent dosage, contact time, temperature, initial metal concentration in solution). The highest Cd(II) uptake of 14.2 mg/g by Rhodotorula sp. was...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2018-02-01
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| Series: | Green Processing and Synthesis |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/gps-2016-0218 |
| _version_ | 1819124872551333888 |
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| author | Roşca Mihaela Hlihor Raluca-Maria Cozma Petronela Drăgoi Elena Niculina Diaconu Mariana Silva Bruna Tavares Teresa Gavrilescu Maria |
| author_facet | Roşca Mihaela Hlihor Raluca-Maria Cozma Petronela Drăgoi Elena Niculina Diaconu Mariana Silva Bruna Tavares Teresa Gavrilescu Maria |
| author_sort | Roşca Mihaela |
| collection | DOAJ |
| description | This study compares the capacity of Rhodotorula sp. and Bacillus megaterium for Cd(II) removal considering the influence of operating parameters (pH, biosorbent dosage, contact time, temperature, initial metal concentration in solution). The highest Cd(II) uptake of 14.2 mg/g by Rhodotorula sp. was exhibited at 30°C, when working at pH 6 and with 5 g/l biosorbent dosage, after 48 h of contact time. In these conditions, a removal efficiency of 85% was obtained. Similar outcomes were obtained for B. megaterium (15.1 mg/g, 90%) at 35°C, pH 4 and 3 g/l biosorbent dosage, considered as the optimum set of parameters, equilibrium being achieved for a contact time of 20 min. The possible interaction mechanisms between the biosorbents and Cd(II) were evaluated through point of zero charge (pHpzc), Fourier transform infrared (FTIR), spectroscopy and scanning electron microscopy coupled with energy dispersive X-ray microanalysis (SEM-EDX). Data were modeled using pseudo-first and pseudo-second order kinetic models and Langmuir and Freundlich isotherms models. Further studies considered a modeling approach based on linear regression with Durbin-Watson statistics, while the accuracy and precision of experiments were evaluated by ANOVA. |
| first_indexed | 2024-12-22T07:31:09Z |
| format | Article |
| id | doaj.art-631c1d059ddf4f80962bf057c40c254e |
| institution | Directory Open Access Journal |
| issn | 2191-9542 2191-9550 |
| language | English |
| last_indexed | 2024-12-22T07:31:09Z |
| publishDate | 2018-02-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Green Processing and Synthesis |
| spelling | doaj.art-631c1d059ddf4f80962bf057c40c254e2022-12-21T18:34:02ZengDe GruyterGreen Processing and Synthesis2191-95422191-95502018-02-0171748810.1515/gps-2016-0218Comparison of Rhodotorula sp. and Bacillus megaterium in the removal of cadmium ions from liquid effluentsRoşca Mihaela0Hlihor Raluca-Maria1Cozma Petronela2Drăgoi Elena Niculina3Diaconu Mariana4Silva Bruna5Tavares Teresa6Gavrilescu Maria7Department of Environmental Engineering and Management, Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University of Iasi, 73 Prof. Dr. Docent D. Mangeron Str., 700050 Iasi, RomaniaDepartment of Environmental Engineering and Management, Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University of Iasi, 73 Prof. Dr. Docent D. Mangeron Str., 700050 Iasi, RomaniaDepartment of Environmental Engineering and Management, Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University of Iasi, 73 Prof. Dr. Docent D. Mangeron Str., 700050 Iasi, RomaniaDepartment of Chemical Engineering, Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi”Technical University of Iasi, 73 Prof. Dr. Docent D. Mangeron Str., 700050 Iasi, RomaniaDepartment of Environmental Engineering and Management, Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University of Iasi, 73 Prof. Dr. Docent D. Mangeron Str., 700050 Iasi, RomaniaCentre of Biological Engineering (CEB), University of Minho, Campus de Gualtar, 4710-057Braga,PortugalCentre of Biological Engineering (CEB), University of Minho, Campus de Gualtar, 4710-057Braga,PortugalDepartment of Environmental Engineering and Management, Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University of Iasi, 73 Prof. Dr. Docent D. Mangeron Str., 700050 Iasi, RomaniaThis study compares the capacity of Rhodotorula sp. and Bacillus megaterium for Cd(II) removal considering the influence of operating parameters (pH, biosorbent dosage, contact time, temperature, initial metal concentration in solution). The highest Cd(II) uptake of 14.2 mg/g by Rhodotorula sp. was exhibited at 30°C, when working at pH 6 and with 5 g/l biosorbent dosage, after 48 h of contact time. In these conditions, a removal efficiency of 85% was obtained. Similar outcomes were obtained for B. megaterium (15.1 mg/g, 90%) at 35°C, pH 4 and 3 g/l biosorbent dosage, considered as the optimum set of parameters, equilibrium being achieved for a contact time of 20 min. The possible interaction mechanisms between the biosorbents and Cd(II) were evaluated through point of zero charge (pHpzc), Fourier transform infrared (FTIR), spectroscopy and scanning electron microscopy coupled with energy dispersive X-ray microanalysis (SEM-EDX). Data were modeled using pseudo-first and pseudo-second order kinetic models and Langmuir and Freundlich isotherms models. Further studies considered a modeling approach based on linear regression with Durbin-Watson statistics, while the accuracy and precision of experiments were evaluated by ANOVA.https://doi.org/10.1515/gps-2016-0218biosorptioncd(ii)microorganismsmodelingstatistical model |
| spellingShingle | Roşca Mihaela Hlihor Raluca-Maria Cozma Petronela Drăgoi Elena Niculina Diaconu Mariana Silva Bruna Tavares Teresa Gavrilescu Maria Comparison of Rhodotorula sp. and Bacillus megaterium in the removal of cadmium ions from liquid effluents Green Processing and Synthesis biosorption cd(ii) microorganisms modeling statistical model |
| title | Comparison of Rhodotorula sp. and Bacillus megaterium in the removal of cadmium ions from liquid effluents |
| title_full | Comparison of Rhodotorula sp. and Bacillus megaterium in the removal of cadmium ions from liquid effluents |
| title_fullStr | Comparison of Rhodotorula sp. and Bacillus megaterium in the removal of cadmium ions from liquid effluents |
| title_full_unstemmed | Comparison of Rhodotorula sp. and Bacillus megaterium in the removal of cadmium ions from liquid effluents |
| title_short | Comparison of Rhodotorula sp. and Bacillus megaterium in the removal of cadmium ions from liquid effluents |
| title_sort | comparison of rhodotorula sp and bacillus megaterium in the removal of cadmium ions from liquid effluents |
| topic | biosorption cd(ii) microorganisms modeling statistical model |
| url | https://doi.org/10.1515/gps-2016-0218 |
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