Degradation of TBBPA by Pseudomonas aeruginosa NY3 was improved through the co-metabolism of sodium lactate,and its promoting mechanism was studied.The results showed that,when the non co-metabolic carbon source system was as the control,degradation efficiency of TBBPA in the system with sodium lactate as co-metabolic carbon source was improved significantly at 48h,with an increase of approximately 74％.Further study revealed that,the TBBPA degrading active substances in the sodium lactate co-metabolism system are distributed both intracellular and extracellular.Compared to that without co-metabolic carbon source,the biomass of Pseudomonas aeruginosa NY3,as well as the level of reactive oxygen species,such as hydrogen peroxide,superoxide anion radical and hydroxyl radical in its extracellular fluid,were increased by the co-metabolism of sodium lactate.The increase in reactive oxygen species levels in extracellular fluid mainly related to the secretion of small molecule secretions such as phenazines and quinolones by Pseudomonas aeruginosa NY3.In summary,sodium lactate co-metabolism promotes the degradation of TBBPA by Pseudomonas aeruginosa NY3 through both intracellular and extracellular pathways.
关键词
四溴双酚A/生物降解/乳酸钠/共代谢/活性氧
Key words
tetrabromobisphenol A/biodegradation/sodium lactate/co-metabolism/reactive oxygen species
维普
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