西玛津的电子束辐照降解

doi:10.12066/j.issn.1007-2861.1945

Abstract

Abstract:

Simazine as a widely used triazine herbicide is toxic to human body and is detected in surface water. It is necessary to remove Simazine. Traditional methods cannot break the triazine ring of Simazine and therefore cannot mineralize Simazine. Electron beam was used to degrade Simazine. The results show that degradation rate of 1 mg/L Simazine reaches 99.0% under 4 kGy irradiation. This indicates that electron beam can effectively remove Simazine according to the first order kinetics. Acidic condition (pH=5) and 2 mmol/L H$_2$O$_2$ can greatly promote degradation. The effects of different radical scavengerson degradation and concentration variation of ions produced in the degradation process indicate that both hydroxyl and hydrated electrons are important in the process. A possible degradation path is proposed in combination with the products detected with LC-MS/MS.

Key words: Simazine, electron beam, hydroxyl radical, hydrated electron, decomposition mechanism

CLC Number:

X786

Wen MAO, Minghong WU, Cheng PENG, Hang CHENG, Gang XU. Degradation of Simazine in aqueous solution by electron beam[J]. Journal of Shanghai University（Natural Science Edition）, 2019, 25(6): 924-932.

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Degradation of Simazine in aqueous solution by electron beam

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