具有铁氧化功能的硝基苯降解菌的筛选及特性

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Abstract An efficient iron bacterium used to degrade nitrobenzene (NB) was isolated from the biological sponge iron system domesticated through NB simulated wastewater. The strain was identified as Arthrobacte sp. The suitable growing conditions, as well as the degradation effect and mechanism in sponge iron system with strain Y-9, were carried out by the contrast experiments. Results indicated that strain Y-9 grew well when the initial concentration of NB was 200mg/L, and the optimal conditions for the biodegradation of NB by strain Y-9 were at 25~40℃ and pH 6~8. Besides, in contrast with the normal sponge irons system and the sponge irons system involved in ordinary activated sludge, the degradation rate of NB in biological sponge irons system at the present of strain Y-9 increased by 88.6% and 32.2%, respectively. The concentration of Fe²⁺, H₂O₂, and ·OH in the biological sponge iron system, especially the system inoculated with strain Y-9, were significantly higher than that of normal sponge iron system, thus, it could promote Fenton-like effect. Quantitative analysis of the degradation products revealed that strain Y-9 followed the partial reductive degradation pathway of NB. The research revealed the mechanism of Fenton-like effect in a biological sponge iron system, and it also provided a new way to treat NB wastewater effectively.

Key words： nitrobenzene degradation ferroxidase sponge iron

Received: 29 September 2017

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	ZHENG Ying
	WANG Ya-e
	MU Biao

Cite this article:

ZHENG Ying,WANG Ya-e,MU Biao. Screening and degradation characteristics of nitrobenzene-degrading bacterium with iron oxidation function[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(5): 1837-1843.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I5/1837

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