Bacterial biodegradation of melamine-contaminated aged soil: influence of different pre-culture media or addition of activation material.
Environ Sci Pollut Res Int
; 23(15): 14997-5002, 2016 Aug.
Article
em En
| MEDLINE
| ID: mdl-27080407
ABSTRACT
This study aimed to investigate the biodegrading potential of Arthrobacter sp. MCO, Arthrobacter sp. CSP, and Nocardioides sp. ATD6 in melamine-contaminated upland soil (melamine approx. 10.5 mg/kg dry weight) after 30 days of incubation. The soil sample used in this study had undergone annual treatment of lime nitrogen, which included melamine; it was aged for more than 10 years in field. When R2A broth was used as the pre-culture medium, Arthrobacter sp. MCO could degrade 55 % of melamine after 30 days of incubation, but the other strains could hardly degrade melamine (approximately 25 %). The addition of trimethylglycine (betaine) in soil as an activation material enhanced the degradation rate of melamine by each strain; more than 50 % of melamine was degraded by all strains after 30 days of incubation. In particular, strain MCO could degrade 72 % of melamine. When the strains were pre-cultured in R2A broth containing melamine, the degradation rate of melamine in soil increased remarkably. The highest (72 %) melamine degradation rate was noted when strain MCO was used with betaine addition.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Arthrobacter
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Poluentes do Solo
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Triazinas
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Actinomycetales
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Meios de Cultura
Idioma:
En
Revista:
Environ Sci Pollut Res Int
Assunto da revista:
SAUDE AMBIENTAL
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TOXICOLOGIA
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Japão