Ion mobility spectrometry was used to monitor the degradation of phthalate vapors by corona discharge. Three different phthalates (dimethyl [DMP], diethyl [DEP], and dipropyl [DPP]) were examined in a corona discharge reactor (wire-to-cylinder geometry) at direct current positive polarity in ambient air. The relative removal efficiencies up to 96% and energetical degradation efficiencies of 229.27, 216.12, and 198.84 kJ mg⁻¹ were achieved for DMP, DEP, and DPP, respectively. Byproducts such as methanol, ethanol, and 1- and 2-propanol at extremely low densities were also detected. The identified degradation processes involved two steps: (i) An electron-impact dissociation of phthalates into alkoxyl radicals and (ii) reactions of alkoxy radicals with water molecules to form alcohols.

中文翻译：

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通过离子迁移谱监测邻苯二甲酸酯的非热等离子体降解

离子迁移谱用于监测电晕放电对邻苯二甲酸酯蒸气的降解。三种不同的邻苯二甲酸酯（二甲基 [DMP]、二乙基 [DEP] 和二丙基 [DPP]）在电晕放电反应器（线对圆柱几何形状）中在环境空气中以直流正极性进行检测。DMP、DEP 和 DPP的相对去除效率高达 96%，能量降解效率分别为 229.27、216.12 和 198.84 kJ mg ^-1。还检测到极低密度的副产物，例如甲醇、乙醇以及 1- 和 2-丙醇。确定的降解过程包括两个步骤：(i) 邻苯二甲酸酯的电子撞击解离成烷氧基和 (ii) 烷氧基与水分子反应形成醇。