草酸强化天然铁矿石异相光助Fenton催化降解萘酚

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Abstract In this study, the structure and composition of the natural iron mineral collected from Maanshan were characterized, and the box-plot design (BBD) of the response surface method was used to evaluate the influencing factors. Moreover, the mechanism of enhanced heterogeneous photo-Fenton activity by oxalate was discussed. The characterization result show that the Maanshan iron mineral is mainly magnetite. The performance evaluation results reveal that oxalate can significantly improve the heterogeneous photo-Fenton activity of the iron mineral, and the removal rate of naphthol increased from 40% to >99% after oxalate addition. The BBD design shows that the dominant factor affecting the degradation of naphthol was oxalate concentration, followed by H₂O₂ concentration. The EPR results reveal that introducing oxalate could significantly improve the generation of CO₂^·- and O₂^·-. The efficient catalytic degradation of naphthol was mainly attributed to the photolysis of iron oxalate complexes formed on iron mineral, which can accelerate the production of O₂^·-. Additionally, the produced Fe(Ⅱ) can accelerate the generation of ·OH via Fenton reaction. The findings can provide guidance for the development of green environmental water pollutant control technology using natural minerals.

Key words： iron mineral oxalate heterogeneous Fenton polycyclic aromatic hydrocarbon (PAHs) mechanism

Received: 23 March 2023

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X52

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	Articles by authors
	HU Cai-ping
	SUO Jin-ran
	DING Guan-tao
	XU Tian-yuan
	WEI Shan-ming
	WANG Kun

Cite this article:

HU Cai-ping,SUO Jin-ran,DING Guan-tao等. Oxalate enhanced heterogeneous photo-Fenton activity of natural iron mineral for naphthol degradation[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(11): 6016-6024.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I11/6016

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