Bacterial biodegradation of organochloride compounds

Química Nova

Universidade de São Paulo, São Carlos, Brasil¹  Porto, André Luiz Meleiro¹  Kasemodel, Mariana Consiglio¹  Nitschke, Marcia¹ 

关键词: biodegradation;    DDD;    dieldrin;    PCP;    rhamnolipids.;   

DOI  :  10.5935/0100-4042.20140218

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Due to their recalcitrant nature, organochlorides are already found in environment and the search for alternatives to eliminate these compounds such as biodegradation using native microorganisms is of great interest. A screening trial to select environmental bacteria able to degrade DDD, PCP and dieldrin was conducted. Among 14 isolates, the soil bacteria Pseudomonas aeruginosa L2-1 showed the highest tolerance to increasing concentrations of the organochlorides and was selected for further studies. Biodegradation was assessed in liquid medium, varying the concentrations of glucose and the presence of rhamnolipids (RL). The best medium for the occurrence of biodegradation of the compounds contained 0.5% glucose, giving approximately 50% yield after three days of incubation. Results showed that the biodegradation rates of the organochlorides by P. aeruginosa L2-1 were greater at low concentrations of glucose and in the presence of rhamnolipids.

【 授权许可】

Unknown