铁酸铜非均相活化过硫酸盐降解罗丹明B

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Abstract

In this study, a novel magnetic catalytic CuFe₂O₄, was synthezed and used to activate peroxymonosulfate (PMS) to degrade Rhodamine B (RhB) which is an anthracene dye. The effects of PMS concentration, CuFe₂O₄ dosage, solution pH, inorganic ions and natural organic matter on RhB degradation were investigated. The results showed that the RhB removal reached 88.87% after 30min reaction under neutral pH conditions when the initial concentrations of RhB, PMS and CuFe₂O₄ were 5μmol/L, 0.1mmol/L and 0.1g/L, respectively. And Cl^-, HCO₃^- had no significant effect on the degradation of RhB, while H₂PO₄^2-,C₂O₄^2- and humic acid had significant inhibition on the degradation of RhB. Free radical identification experiments showed that SO₄^- and·OH were the main free radicals in the system of CuFe₂O₄/PMS under neutral and weak alkaline conditions. It was found that the solution gradually fades and the formate, acetate, oxalate and ammonium ions were producedin the process of RhB degradation. This is attributing to the destruction of the chromophore on RhB molecule upon SO₄^- and·OH attacks, leading to the opening of benzene ring and the falling off of nitrogen atom. The mineralization experiment showed that when 0.2mmol/L of RhB was degraded in the CuFe₂O₄/PMS system for 10h, the mineralization rate reached 62%. Catalyst recycling experiments showed that the prepared CuFe₂O₄ had a good recycling ability.

Key words： rhodamine B CuFe₂O₄ persulfate sulfate radical hydroxyl radical

Received: 15 February 2019

PACS:

X703.1

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	Articles by authors
	YANG Ke
	TANG Qi
	YANG Xiao-dan
	LI Min-rui
	DING Xin-xin
	BAI Meng-qi
	WANG Yu-ru

Cite this article:

YANG Ke,TANG Qi,YANG Xiao-dan等. Degradation of rhodamine B by heterogeneous activation of persulfate with copper ferrate[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(9): 3761-3769.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I9/3761

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