Biodegradation of chlorimuron-ethyl by the bacterium Klebsiella jilinsis 2N3.
J Environ Sci Health B
; 45(6): 501-7, 2010 Aug.
Article
em En
| MEDLINE
| ID: mdl-20574870
Enrichment culturing of sludge taken from an industrial wastewater treatment pond led to the identification of a bacterium (Klebsiella jilinsis H. Zhang) that degrades chlorimuron-ethyl with high efficiency. Klebsiella jilinsis strain 2N3 grows with chlorimuron-ethyl as the sole nitrogen source at the optimal temperature range of 30-35 degrees C and pH values between 6.0-7.0. In liquid medium, the degradation activity was further induced by chlorimuron-ethyl. Degradation rates followed the pesticide degradation kinetic equation at concentrations between 20 and 200 mg L(-1). Using initial concentrations of 20 and 100 mg L(-1), the degradation rates of chlorimuron-ethyl were 83.5 % and 92.5 % in 12 hours, respectively. At an initial concentration higher than 200 mg L(-1), the degradation rate decreased slightly as the concentration increased. The 2N3 strain also degraded the sulfonylurea herbicides ethametsulfuron, metsulfuron-methyl, nicosulfuron, rimsulfuron, and tribenuron-methyl. This study provides scientific evidence and support for the application of K. jilinsis in bioremediation to reduce environmental pollution.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Praguicidas
/
Pirimidinas
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Esgotos
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Compostos de Sulfonilureia
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Klebsiella
Idioma:
En
Revista:
J Environ Sci Health B
Ano de publicação:
2010
Tipo de documento:
Article