光催化与生物膜直接耦合降解4-氟苯酚废水

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Abstract In this study, a novel intimately coupling photocatalysis and biodegradation (ICPB) system composed of N-doped TiO₂- coated photocatalytic optical fibers, biofilm, nuclear pore membrane and UV-Visible LED light source was successfully demonstrated for rapid and continuous degradation of 4-fluorophenol (4-FP). We investigated the performance of isolated photocatalysis, separated microalgae biofilm and ICPB systems for the degradation of 4-FP. The results highlighted that the isolated photocatalytic system exposed low degradation (94.3% removal of 4-FP) and defluorination (24.7% defluorinated) in 12h. The isolated microalgae system exhibited better degradation performance than those of the photocatalysis in the first cycle, the removal of 4-FP and defluorinated reached to 98.9% and 90.9% in 10h; however, they decreased to 75.5% and 69.5% after three cycles, respectively. In the ICPB system, the biofilm, which enriched Rhodococcus, Pseudomonas and Achromobacter, led to synergism among photocatalysis, biodegradation and photosynthesis. This synergism provided rapid and continuous degradation of 4-FP, exhibited 100% removal of 4-FP after cycle 12, in 5h, accompanied with 89.4% removal of dissolved organic carbon and 78.3% defluorination.

Key words： 4-fluorophenol intimately coupling photocatalysis and biodegradation quartz optical hollow-fiber photocatalysis biofilm microalgae

Received: 06 January 2020

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X703.1

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	Articles by authors
	ZHONG Lan-lan
	YUAN Ji-lin
	LUO Hong-yang
	XIANG Wen-hao
	LI Lin-yang
	XIAO Chuan-bao
	ZHONG Nian-bing

Cite this article:

ZHONG Lan-lan,YUAN Ji-lin,LUO Hong-yang等. The degradation of 4-fluorophenol wastewater by intimately coupling photocatalysis and biofilm syestem[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(8): 3660-3666.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I8/3660

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