球磨－煅烧法制备Fe3O4-CuxO及其活化Oxone降解盐酸左氧氟沙星

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Abstract

The Fe₃O₄-Cu_xO composite was successfully prepared by a ball milling-calcination method, and the composite was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and magnetic detection. Degradation efficiency of levofloxacin hydrochloride (LVF) was evaluated by Fe₃O₄-Cu_xO composite activated oxone. Effect of calcination temperature and Fe/CuO mass ratio on catalytic performance of the composite was investigated. The degradation efficiencies of LVF over prepared composite were investigated by adjusting the reaction conditions such as the composite dosage, oxone concentration and pH. The results showed that optimum catalytic performance was obtained at calcination temperature of 300℃ and Fe/CuO mass ratio of 1:1. Repeated experiment results showed that Fe₃O₄-Cu_xO composite possessed an excellent catalytic stability. The degradation efficiency of LVF over Fe₃O₄-Cu_xO composite reached to 99.5% after 60min with the composite dosage, oxone concentration and pH of 1.4g/L, 0.6mmol/L and 11, respectively. The quenching experiment and ESR analysis demonstrated that the LVF degradation was determined by the synergistic effect of SO₄^-·and·OH reactive species.

Key words： Fe₃O₄-Cu_xO ball milling calcination Levofloxacin hydrochloride sulfate radical

Received: 19 June 2019

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X52

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	ZHANG Wan-Peng
	ZHENG Li-Qing
	Yang Xin-Yu
	WANG Chun-Feng
	LU Tong

Cite this article:

ZHANG Wan-Peng,ZHENG Li-Qing,Yang Xin-Yu等. Degradation of Levofloxacin hydrochloride by the Fe₃O₄-Cu_xO composite prepared using ball milling-calcination method with Oxone activation[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(1): 143-152.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I1/143

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