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Journal of Shanghai University >

2019 , Vol. 25 >Issue 1: 101 - 108

DOI: https://doi.org/10.12066/j.issn.1007-2861.1904

Research Articles

Degradation of sulfamethoxazole in aqueous solution by electron beam

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  • School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China

Received date: 2017-04-09

  Online published: 2019-02-26

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Abstract

Sulfamethoxazole (SMX) is a widely used antibacterial drug. It is hard to degrade effectively in aqueous solutions in a traditional wastewater treatment process. This study focuses on SMX degradation using an advanced oxidation technique, electron beam radiation, to investigate effects of different factors on degradation. The results show that the degradation rate of electron beam for SMX is high. SMX is almost completely degraded at 5 kGy. Degradation of SMX obeys a pseudo first-order kinetic equation. Alkaline condition and proper amount of H$_2$O$_2$ are beneficial to the degradation. Hydroxyl radical and electron play an important role in the degradation of electron beam. Intermediates can be detected with ion chromatography (IC) and liquid chromatography-tandem mass spectrometry (LC-MS-MS). Several degradation pathways are proposed.

Key words： sulfamethoxazole (SMX); electron beam; intermediate; degradation pathway

Cite this article

YUAN Debao, DENG Fei, MAO Wen, ZHAO Tao, HU Mian, WU Minghong, XU Gang . Degradation of sulfamethoxazole in aqueous solution by electron beam[J]. Journal of Shanghai University, 2019 , 25(1) : 101 -108 . DOI: 10.12066/j.issn.1007-2861.1904

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