阴离子对Mo<sub>2</sub>C/过氧单硫酸盐降解抗生素的影响

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Abstract The effects of typical inorganic anions SO₄^2-, NO₃^-, Cl^-, HCO₃^-, CO₃^2- on oxidative degradation of chloramphenicol antibiotics by layered Mo₂C activated peroxonosulfate (PMS) were investigated. The results showed that the degradation of three chloramphenicol antibiotics (chloramphenicol, thiamphenicol and flufenicol) was inhibited by the five inorganic anions, in which SO₄^2- and NO₃^- mainly affected the reaction rate. Cl^-, HCO₃^- and CO₃^2- affected both the degradation percentage and the reaction rate. When the concentrations of Cl^-, HCO₃^- and CO₃^2- were 20mmol/L, the degradation percentage of chloramphenicol was decreased from 100% to 59.27%, 2.85% and 0%, respectively. The degradation percentage of thiamphenicol was decreased from 100% to 64.64%, 8.54% and 0%, respectively. And the degradation percentage of flufenicol was decreased from 100% to 33.23%, 1.38%, and 0%, respectively. Among them, CO₃^2- had a strong inhibitory effect on antibiotics degradation, and the degradation of three chloramphenicol antibiotics was completely inhibited at the presence of 5mmol/L CO₃^2-. The effects of five inorganic anions on the degradation of three chloramphenicol antibiotics showed the trend, as CO₃^2-> HCO₃^- > Cl^- > NO₃^- ≈ SO₄^2-. In addition, there was a significant negative correlation between the degradation of the three antibiotics and Cl^-, while there was also a significant negative correlation between the degradation of thiamphenicol, flufenicol and HCO₃^-. The results provided a reference for the practical application of advanced oxidation processes.

Key words： inorganic anion layered Mo₂C peroxymonosulfate advanced oxidation processes chloramphenicol thiamphenicol flufenicol

Received: 30 August 2023

PACS:

X703.5

Corresponding Authors: 陈旭文,助理研究员,chenxuwen@njau.edu.cn E-mail: chenxuwen@njau.edu.cn

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	ZHOU Zhou
	TANG Lei
	ZHAO Xu-qiang
	CHEN Xu-wen
	WANG He-fei
	GAO Yan-zheng

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ZHOU Zhou,TANG Lei,ZHAO Xu-qiang等. Effect of anions on the degradation of antibiotics by Mo₂C/peroxonosulfate[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(3): 1648-1656.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I3/1648

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