微氧环境氯代烃生物降解的研究现状与展望

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Abstract The biodegradation characteristics of chlorinated hydrocarbons (CAHs) in micro-aerobic environments were summarized in this study. A systematic investigation of CAHs contamination in micro-aerobic environments was conducted, revealing extensive CAHs pollution in locations such as groundwater, soil vadose zones, riverbed sediments, and landfill sites with micro-aerobic conditions. Additionally, the study compiled the pathways of CAHs degradation under oxygen regulation and analyzed the transformation characteristics, microbial activity, and functional gene expression of CAHs in micro-aerobic environments. It was concluded that oxygen had five distinct effects on CAHs degradation under micro-aerobic conditions, with degradation rates often surpassing those observed under strictly aerobic or anaerobic conditions. Moreover, both aerobic and anaerobic degraders coexisted in micro-aerobic environments, as evidenced by the detection of aerobic functional genes (etnC and etnE) and anaerobic functional genes (vcrA and bvcA) in various micro-aerobic pollution sites, indicating that aerobic transformations and anaerobic dechlorination could occur simultaneously in the same spatial and temporal settings. Finally, future development directions were projected in four aspects, including monitoring device development, adaptation mechanisms, transformation mechanisms, and microecological evolution patterns. These results offer valuable insights for the study of pollutant transformation in micro-aerobic environments and the formulation of pollution control strategies.

Key words： micro-aerobic environment chlorinated organic substances biodegradation mechanistic regulation development direction

Received: 07 February 2023

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	XING Zhi-lin
	SHI Yun-chun
	SU Xia
	GOU Fang
	ZHAO Tian-tao

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XING Zhi-lin,SHI Yun-chun,SU Xia等. The current status and prospects of biodegradation of chlorinated hydrocarbons under micro-aerobic conditions[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(9): 4837-4848.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I9/4837

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