Biosorption Potential of Bacillus salmalaya Strain 139SI for Removal of Cr(VI) from Aqueous Solution
The present study investigated the biosorption capacity of live and dead cells of a novel Bacillus strain for chromium. The optimum biosorption condition was evaluated in various analytical parameters, including initial concentration of chromium, pH, and contact time. The Langmuir isotherm model sho...
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doaj-44d256bfa4294798bbe051e03789ef892020-11-24T22:57:50ZengMDPI AGInternational Journal of Environmental Research and Public Health1660-46012015-12-011212153211533810.3390/ijerph121214985ijerph121214985Biosorption Potential of Bacillus salmalaya Strain 139SI for Removal of Cr(VI) from Aqueous SolutionArezoo Dadrasnia0Kelvin Swee Chuan Wei1Nasser Shahsavari2Mohd Sofian Azirun3Salmah Ismail4Department of Biohealth Science, Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, MalaysiaDepartment of Biohealth Science, Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, MalaysiaDepartment of Biological Science, College of Agricultural and Environmental Engineering, Islamic Azad University, Hajiabad Branch, Hormozgan 55773, IranInstitute of Biological Sciences, Faculty of Science, University Malaya, 50603 Kuala Lumpur, MalaysiaDepartment of Biohealth Science, Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, MalaysiaThe present study investigated the biosorption capacity of live and dead cells of a novel Bacillus strain for chromium. The optimum biosorption condition was evaluated in various analytical parameters, including initial concentration of chromium, pH, and contact time. The Langmuir isotherm model showed an enhanced fit to the equilibrium data. Live and dead biomasses followed the monolayer biosorption of the active surface sites. The maximum biosorption capacity was 20.35 mg/g at 25 °C, with pH 3 and contact time of 50 min. Strain 139SI was an excellent host to the hexavalent chromium. The biosorption kinetics of chromium in the dead and live cells of Bacillus salmalaya (B. salmalaya) 139SI followed the pseudo second-order mechanism. Scanning electron microscopy and fourier transform infrared indicated significant influence of the dead cells on the biosorption of chromium based on cell morphological changes. Approximately 92% and 70% desorption efficiencies were achieved using dead and live cells, respectively. These findings demonstrated the high sorption capacity of dead biomasses of B. salmalaya 139SI in the biosorption process. Thermodynamic evaluation (ΔG0, ΔH0, and ΔS0) indicated that the mechanism of Cr(VI) adsorption is endothermic; that is, chemisorption. Results indicated that chromium accumulation occurred in the cell wall of B. salmalaya 139SI rather than intracellular accumulation.http://www.mdpi.com/1660-4601/12/12/14985Bacillus salmalayabioremediationchromiumkineticisotherm |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Arezoo Dadrasnia Kelvin Swee Chuan Wei Nasser Shahsavari Mohd Sofian Azirun Salmah Ismail |
spellingShingle |
Arezoo Dadrasnia Kelvin Swee Chuan Wei Nasser Shahsavari Mohd Sofian Azirun Salmah Ismail Biosorption Potential of Bacillus salmalaya Strain 139SI for Removal of Cr(VI) from Aqueous Solution International Journal of Environmental Research and Public Health Bacillus salmalaya bioremediation chromium kinetic isotherm |
author_facet |
Arezoo Dadrasnia Kelvin Swee Chuan Wei Nasser Shahsavari Mohd Sofian Azirun Salmah Ismail |
author_sort |
Arezoo Dadrasnia |
title |
Biosorption Potential of Bacillus salmalaya Strain 139SI for Removal of Cr(VI) from Aqueous Solution |
title_short |
Biosorption Potential of Bacillus salmalaya Strain 139SI for Removal of Cr(VI) from Aqueous Solution |
title_full |
Biosorption Potential of Bacillus salmalaya Strain 139SI for Removal of Cr(VI) from Aqueous Solution |
title_fullStr |
Biosorption Potential of Bacillus salmalaya Strain 139SI for Removal of Cr(VI) from Aqueous Solution |
title_full_unstemmed |
Biosorption Potential of Bacillus salmalaya Strain 139SI for Removal of Cr(VI) from Aqueous Solution |
title_sort |
biosorption potential of bacillus salmalaya strain 139si for removal of cr(vi) from aqueous solution |
publisher |
MDPI AG |
series |
International Journal of Environmental Research and Public Health |
issn |
1660-4601 |
publishDate |
2015-12-01 |
description |
The present study investigated the biosorption capacity of live and dead cells of a novel Bacillus strain for chromium. The optimum biosorption condition was evaluated in various analytical parameters, including initial concentration of chromium, pH, and contact time. The Langmuir isotherm model showed an enhanced fit to the equilibrium data. Live and dead biomasses followed the monolayer biosorption of the active surface sites. The maximum biosorption capacity was 20.35 mg/g at 25 °C, with pH 3 and contact time of 50 min. Strain 139SI was an excellent host to the hexavalent chromium. The biosorption kinetics of chromium in the dead and live cells of Bacillus salmalaya (B. salmalaya) 139SI followed the pseudo second-order mechanism. Scanning electron microscopy and fourier transform infrared indicated significant influence of the dead cells on the biosorption of chromium based on cell morphological changes. Approximately 92% and 70% desorption efficiencies were achieved using dead and live cells, respectively. These findings demonstrated the high sorption capacity of dead biomasses of B. salmalaya 139SI in the biosorption process. Thermodynamic evaluation (ΔG0, ΔH0, and ΔS0) indicated that the mechanism of Cr(VI) adsorption is endothermic; that is, chemisorption. Results indicated that chromium accumulation occurred in the cell wall of B. salmalaya 139SI rather than intracellular accumulation. |
topic |
Bacillus salmalaya bioremediation chromium kinetic isotherm |
url |
http://www.mdpi.com/1660-4601/12/12/14985 |
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