A novel method for accelerating zearalenone degradation using ultraviolet light and atmospheric cold plasma: Insights
Wan Zhang1, Changpo Sun2, Wei Wang3
1Academy of National Food and Strategic Reserves Administration, Beijing 100037, China; College of Engineering, China Agricultural University, Beijing 100083, China.
Abstract:
Zearalenone (ZEN) is an estrogenic mycotoxin, posing a serious threat to food safety and human health. In this study, a new technique coupling ultraviolet (UV) and atmospheric cold plasma (ACP) was used to investigate how to degrade ZEN efficiently and to reveal the accelerated degradation mechanism. Within 1 min, UV and ACP together degraded 61.65 % of ZEN, which was greater than the sum of UV alone (16.67 %) and ACP alone (3.28 %), showing a synergistic effect. Four degradation products were identified using isotope tracing, LC-MS/MS, and NMR, namely UV-mediated isomerization product cis-ZEN and ACP-mediated oxidation products. After 10 min, ZEN was reduced from 0.58 μg to 0.08 μg. cis-ZEN accounted for more than 90 % among all products. The degradation acceleration was attributed to fast electron transitions and high energy release under high-voltage electric fields and ACP. This study provides a potential detoxification method for other mycotoxins, showing a broad application prospect.
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