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Biodegradation of triazine herbicide metribuzin by the strain Bacillus sp. N1.
- Source :
-
Journal of Environmental Science & Health. Part B. Pesticides, Food Contaminants & Agricultural Wastes . Feb2014, Vol. 49 Issue 2, p79-86. 8p. - Publication Year :
- 2014
-
Abstract
- By enrichment culturing of soil contaminated with metribuzin, a highly efficient metribuzin degrading bacterium,Bacillussp. N1, was isolated. This strain grows using metribuzin at 5.0% (v/v) as the sole nitrogen source in a liquid medium. Optimal metribuzin degradation occurred at a temperature of 30ºC and at pH 7.0. With an initial concentration of 20 mg L−1, the degradation rate was 73.5% in 120 h. If the initial concentrations were higher than 50 mg L−1, the biodegradation rates decreased as the metribuzin concentrations increased. When the concentration was 100 mg L−1, the degradation rate was only 45%. Degradation followed the pesticide degradation kinetic equation at initial concentrations between 5 mg L−1and 50 mg L−1. When the metribuzin contaminated soil was mixed with strain N1 (with the concentration of metribuzin being 20 mg L−1and the inoculation rate of 1011g−1dry soil), the degradation rate of the metribuzin was 66.4% in 30 days, while the degradation rate of metribuzin was only 19.4% in the control soil without the strain N1. These results indicate that the strain N1 can significantly increase the degradation rate of metribuzin in contaminated soil. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 03601234
- Volume :
- 49
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Journal of Environmental Science & Health. Part B. Pesticides, Food Contaminants & Agricultural Wastes
- Publication Type :
- Academic Journal
- Accession number :
- 92942679
- Full Text :
- https://doi.org/10.1080/03601234.2014.844610