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

Yue LV (吕悦); Liang ZOU (邹亮); Huidong LI (李慧冬); Zilei CHEN (陈子雷); Xiaolong WANG (王晓龙); Ying SUN (孙滢); Liping FANG (方丽萍); Tong ZHAO (赵彤); Yuantao ZHANG (张远涛)

doi:10.1088/2058-6272/abe926

Plasma Science and Technology > 2021 > 23(5): 55506-055506. > DOI: 10.1088/2058-6272/abe926

Yue LV (吕悦), Liang ZOU (邹亮), Huidong LI (李慧冬), Zilei CHEN (陈子雷), Xiaolong WANG (王晓龙), Ying SUN (孙滢), Liping FANG (方丽萍), Tong ZHAO (赵彤), Yuantao ZHANG (张远涛). Investigation of non-thermal atmospheric plasma for the degradation of avermectin solution[J]. Plasma Science and Technology, 2021, 23(5): 55506-055506. DOI: 10.1088/2058-6272/abe926

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

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

Funds: The authors thank National Natural Science Foundation of China (Grant Nos. 11675095 and 52077128) and the Fundamental Research Funds of Shandong University (Grant No. 2017JC017) for supporting the research.

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Received Date: September 19, 2020
Revised Date: February 19, 2021
Accepted Date: February 22, 2021

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Abstract

Abstract

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 NTAP-generated O degrading AVM by destroying the glycosyl group or fracturing the ester group.
- non-thermal atmospheric plasma,
- pesticide degradation,
- avermectins,
- moleculardynamics simulation

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