乳酸钠共代谢对铜绿假单胞菌NY3降解四溴双酚A的促进机理

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Abstract 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.

Key words： tetrabromobisphenol A biodegradation sodium lactate co-metabolism reactive oxygen species

Received: 20 June 2023

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X703

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	ZHANG Qi
	NIE Hong-yun
	GUO Di-ni
	CHEN Li-jiao
	NIE Mai-qian
	WANG Lei
	WANG Lei

Cite this article:

ZHANG Qi,NIE Hong-yun,GUO Di-ni等. The promoting mechanism of sodium lactate co-metabolism on the degradation of tetrabromobisphenol A by Pseudomonas aeruginosa NY3[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(2): 739-746.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I2/739

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