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.

随着农产品表面农药残留（PRs）的存在，人们对食品安全的日益关注导致相应PRs的实用降解技术的快速发展。在本文中，提出了一种非常规的农药降解方法，即非热常压等离子体 (NTAP)，用于降解水溶液中的阿维菌素 (AVM)。光发射光谱表明，由丝状流光组成的 NTAP 包含多种可能与 AVM 相互作用的活性氧 (ROS)。高效液相色谱 (HPLC)-MS/MS 结果表明 AVM 降解效率严重取决于 NTAP 的多个操作参数，包括施加的电压、处理时间和气体流速。观察到 AVM 的最大降解率为 97。^-1。进行了基于 O（基态原子氧）和 AVM 之间相互作用的反应力场的分子动力学模拟，以分析基础机制。模拟结果显示了 NTAP 产生的 O 降解 AVM 通过破坏糖基或破坏酯基的可能途径。