高级氧化技术在果蔬清洗中的应用

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Abstract This study investigated the performance of fruit and vegetable washing by seven advanced oxidation processes (AOPs), namely, electrolysis, ozonation, ultraviolet (UV), available chlorine electro-production (E-Cl), hydrogen peroxide electro-production (E-H₂O₂), UV combined with E-Cl (UV/E-Cl), and UV combined with E-H₂O₂ (UV/E-H₂O₂). Results showed that among the seven AOPs, the UV/E-H₂O₂ process exhibited the best disinfection performance of completely inactivating 7.11logCFU/mL of Escherichia coli within 5 minutes, without observing any photoreactivation. Furthermore, 93.2% of the herbicide atrazine was abated in 10min by UV/E-H₂O₂ process. Meanwhile, the generation of disinfection by-products was also effectively controlled during this process. Based on these results, a H₂O₂ in-situ production system was set up with a carbon-polytetrafluoroethylene electrode in the natural air diffusion way, and the lifetime and operational cost of the system were evaluated for practical fruit and vegetable washing. Results showed that the electrode could be used for more than one year under daily use, and the operational cost was 3.9%~13.5% to the price of commercial H₂O₂.

Key words： fruits and vegetable washing disinfection agricultural chemical residue disinfection by-products hydrogen peroxide

Received: 14 April 2023

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	Articles by authors
	CHAI Song
	CHEN Zi-ang
	WEI wei
	LIU Jian
	WANG Yu-jue
	ZHAN Ju-hong
	ZHAO Er-zhuo

Cite this article:

CHAI Song,CHEN Zi-ang,WEI wei等. Advanced oxidation processes on fruit and vegetable washing[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(11): 5777-5786.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I11/5777

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