2-羟基-1,4-萘醌介导Fe<sup>2+</sup>-STPP厌氧还原对硝基酚

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Abstract The functions of Fe²⁺, STPP, 2-hydroxy-1,4-naphthoquinone (LQ) on the reduction of p-nitrophenol (PNP) in the anaerobic water environment were studied in this research. Besides, effects of different factors on the reduction of PNP by LQ mediated Fe²⁺-STPP were also explored. The results showed that the experiment system had the reduction effect on PNP when the initial pH value was 3~9 and the change of STPP concentration made no difference on the reduction of PNP. However, with the increase of the concentration of LQ or Fe²⁺, the reduction rate of PNP increased. The mechanism research showed that 58.4% of LQ produced non-quinone after accepting electrons, and the rest of LQ became semiquinone radical and then transferred electrons to PNP. In addition, only a small part of the electrons provided by Fe²⁺ were used in PNP reduction, and the overall electron utilization efficiency of the experimental system was low.

Key words： Fe²⁺ Sodium tripolyphosphate 2-hydroxy-1,4-naphthoquinone Electronic shuttle P-nitrophenol

Received: 11 August 2020

PACS:

X703.1

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	XUAN Li-shuang
	QIN Chuan-yu
	ZHANG Cheng-wu
	ZHANG Jing-yi
	YUAN Fang

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XUAN Li-shuang,QIN Chuan-yu,ZHANG Cheng-wu等. LQ-mediated reduction of p-nitrophenol via Fe(II) coupling sodium tripolyphosphate under anaerobic conditions[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(3): 1148-1154.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I3/1148

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