Native soil bacterial isolate in Malaysia exhibit promising supplements on degrading organic pollutants
| Autor: | Kelvin Swee Chuan Wei, Salmah Ismail, Rita Devi Velappan, Hossein Jamali, Arezoo Dadrasnia, Nooshin Mohebali, Mohammed Maikudi Usman |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Pollutant chemistry.chemical_classification Bioaugmentation Environmental Engineering General Chemical Engineering 030106 microbiology Biodegradable waste 010501 environmental sciences Biodegradation 01 natural sciences Soil contamination Microbiology Biostimulation 03 medical and health sciences chemistry.chemical_compound Hydrocarbon chemistry Environmental Chemistry Food science Total petroleum hydrocarbon Safety Risk Reliability and Quality 0105 earth and related environmental sciences |
| Zdroj: | Process Safety and Environmental Protection. 100:264-271 |
| ISSN: | 0957-5820 |
| DOI: | 10.1016/j.psep.2016.02.001 |
| Popis: | A novel strain was isolated from an agricultural soil in Malaysia. After morphological and genetic characterization, the novel strain showed the highest similarity to Bacillus species. The ability of biostimulation (waste tealeaf) and bioaugmentation ( Bacillus salmalaya 139SI) activities was investigated on soil polluted with 6% (w/w) waste crude oil for duration of 60 days. Strain 139SI was able to decrease the surface tension to 35 mN/m. Degradation of the initial petroleum hydrocarbon by 70% was achieved in the treatments involving B. salmalaya strain 139SI and tealeaf compared to the sterilized polluted soil (15%), which served as a control for this study. The aerobic utilizing bacteria counts and dehydrogenase activity were significantly increased during the period of study. Analysis of residual waste crude oil monitored by gas chromatography spectrophotometer indicated 80–95% degradation of n-C 8 to C 12 followed by a 40% removal ratio of C 22 . Kinetic model showed that treatment amended with both tealeaf and strain has indicated the highest level of biodegradation rate, with rate constant of 0.107 day −1 , while the biodegradation rate was 0.08 day −1 in treatments amended with only tealeaf. The finding showed the potentiality of tealeaf and Bacillus salmalaya 139SI toward the degradation/decomposition of crude oil in contaminated soil. |
| Databáze: | OpenAIRE |
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