Investigation of non-thermal atmospheric plasma for the degradation of avermectin solution  

作　　者：Yue LV Liang ZOU Huidong LI Zilei CHEN Xiaolong WANG Ying SUN Liping FANG Tong ZHAO Yuantao ZHANG 吕悦;邹亮;李慧冬;陈子雷;王晓龙;孙滢;方丽萍;赵彤;张远涛(School of Electrical Engineering,Shandong University,Ji’nan 250061,People’s Republic of China;Institute of Agricultural Quality Standards and Testing Technology,Shandong Academy of Agricultural Sciences,Ji’nan 250061,People’s Republic of China)

机构地区：[1]School of Electrical Engineering,Shandong University,Ji’nan 250061,People’s Republic of China [2]Institute of Agricultural Quality Standards and Testing Technology,Shandong Academy of Agricultural Sciences,Ji’nan 250061,People’s Republic of China

出　　处：《Plasma Science and Technology》2021年第5期126-138,共13页等离子体科学和技术（英文版）

基　　金：National Natural Science Foundation of China (Grant Nos. 11675095 and 52077128);the Fundamental Research Funds of Shandong University (Grant No. 2017JC017) for supporting the research。

摘　　要：Increasing concern with regard to food safety in the presence of pesticide residues(PRs) on the surface of agricultural products has resulted in the rapid development of practical degrading technologies for corresponding PRs. In this paper, an unconventional method of degrading pesticides, non-thermal atmospheric plasma(NTAP), was proposed to degrade the avermectin(AVM) in aqueous solution. Optical emission spectroscopy shows that NTAP, consisting of filamentary streamers, contains a variety of reactive oxygen species(ROS) that may interact with AVM. The high-performance liquid chromatography(HPLC)-MS/MS results indicate that the efficiency of AVM degradation seriously depends on multiple operation parameters of the NTAP,including the applied voltage, treatment time and gas flow rate. The maximum degradation rate of AVM was observed to be 97.47% after 240 s exposure under NTAP with an applied voltage of 18 kV and gas flow rate of 1 l min-1. Molecular dynamics simulation based on a reactive force field for the interaction between O(ground state atomic oxygen) and AVM was performed to analyze the underpinning mechanisms. The simulation result shows the possible pathways of the NTAPgenerated O degrading AVM by destroying the glycosyl group or fracturing the ester group.

关 键 词：non-thermal atmospheric plasma pesticide degradation AVERMECTINS molecular dynamics simulation 

分 类 号：S481.8[农业科学—农药学]