Pesticides are vital and indispensable especially in agricultural production. However, pesticide contamination is also a serious threat to human health and the environment. Imidacloprid (IMD), an archetypal neonicotinoid insecticide, is commonly used to protect a variety of crops worldwide. This study examined the destruction of IMD contaminant in wastewater via catalytic oxidation with sodium percarbonate (SPC). The process exemplified 100% removal at optimum condition. Rates of reaction were expressed in terms of the apparent rate constants (k_app) and were observed to satisfactorily follow pseudo-first-order kinetics. Inhibitory effects of humic acid and various coexisting ions on IMD degradation were examined and the trend was observed as follows: NO₂⁻ > PO₄³⁻ > NH₄⁺ > Cl⁻ > NO₃⁻_. In addition, we elucidated the participation of OH (hydroxyl), O₂⁻ (superoxyl), and HO₂ (perhydroxyl) radicals in the process by performing scavenging experiments for these reactive oxygen species. A likely IMD degradation pathway was proposed based on the intermediate species identified via gas chromatography/mass spectroscopy electron ionization procedure. Overall, the present study established SPC as a cleaner alternative to other oxidants for pesticide degradation as it is non-toxic, safe to handle, and produces by-products that inherently exist in the natural water matrix.

农药至关重要，必不可少，特别是在农业生产中。但是，农药污染也是对人类健康和环境的严重威胁。吡虫啉（IMD）是一种典型的新烟碱类杀虫剂，通常用于保护全世界的各种农作物。这项研究检查了过碳酸钠（SPC）催化氧化对废水中IMD污染物的破坏。该工艺例证了在最佳条件下100％去除的效果。反应速率以表观速率常数（k _app）表示，并且观察到令人满意地遵循拟一级动力学。检查腐殖酸和IMD降解各种共存离子的抑制效果，观察趋势如下：NO ₂ ^-> PO ₄ ^3- > NH ₄ ⁺ >氯^- > NO ₃ ^- _。此外，我们阐明参与OH（羟基），Ô ₂ ^-（superoxyl），和HO ₂通过对这些活性氧物种进行清除实验，在过程中获得（全羟基）自由基。基于通过气相色谱/质谱电子电离程序鉴定的中间物质，提出了可能的IMD降解途径。总体而言，本研究确立了SPC作为农药降解过程中其他氧化剂的更清洁替代品，因为它无毒，操作安全并且会产生天然水基质中固有的副产物。