固定化菌剂对邻苯二甲酸酯的降解效能及途径

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Abstract To enhance the efficiency of microbial degradation of PAEs in the environment, this study immobilized three strains, namely Glutamicibacter sp.A4, Bacillus sp.W34and Rhodococcus sp.2G, on biochar though adsorption method. The degradation efficiency of strains on six PAEs was investigated, and the metabolic pathway of PAEs degradation was preliminarily analyzed. The results showed that the complex flora achieved an 80.04% degradation rate of 120mg/L ∑₆PAEs after 7days. Under optimal conditions (2days immobilization at 30℃, and a bacteria-material ratio of 1:30(V/M)), the prepared immobilized bacterial agent achieved a 96.60% degradation rate of ∑₆PAEs, which was16.56% higher than that of free bacteria. During the degradation of DBP and BBP by complex bacteria, several metabolites,including monomethyl phthalate (MMP) and monoethyl phthalate (MEP),were produced. This suggested that ester hydrolysis was an important biodegradation process for PAEs. The findings of this study provided a theoretical basis for the application of immobilized bacterial agents in the remediation of environmental organic pollution.

Key words： complex flora immobilized bacterial agent phthalate biodegradation degradation pathway

Received: 30 September 2023

PACS:

X172

Corresponding Authors: 高彦征,教授,gaoyanzheng@njau.edu.cn E-mail: gaoyanzheng@njau.edu.cn

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	Articles by authors
	LU Wen-yi
	WANG Ze-ming
	ZUO Xiang-zhi
	LIU Yi-xiang
	WU Hai-tao
	GAO Yan-zheng

Cite this article:

LU Wen-yi,WANG Ze-ming,ZUO Xiang-zhi等. The degradation performance and pathways of phthalic acid esters by immobilized bacterial agent[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(3): 1584-1591.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I3/1584

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