摘要：

以邻苯二甲酸二丁酯（DBP）为研究对象，用SPE-GC-MS、UV-Vis及HPLC研究了微波诱导ClO₂催化氧化水中DBP的过程。结果表明，与水浴法相比，微波的引入能较好地提高DBP去除率，微波-ClO₂-催化剂具有较高的协同氧化效应。微波诱导ClO₂催化氧化反应的中间产物为邻苯二甲酸（PA），提出了DBP被氧化降解的反应途径，并指出微波诱导ClO₂催化氧化DBP反应首先进行单电子转移，再进行自由基的氧化反应，进攻位点为芳环侧链的酯基，而不是芳环。

关键词: 微波, 诱导, 二氧化氯, 邻苯二甲酸二丁酯, 催化, 降解

Abstract:

With dibutyl phthalate as the research substrate, the reaction oxidation processes of microwave-induced ClO₂ catalytic oxidation in water were studied by solid-phase extraction gas chromatography-mass spectrometry(SPE-GC-MS), ultraviolet-visible spectroscopy(UV-Vis) and high performance liquid chromatography(HPLC) techniques. The results showed that the microwave radiation method could improve DBP removals efficiently, compared with water bath method. The microwave-ClO₂-catalyst oxidation process had high synergistic oxidation effect. The main intermediate phthalic acid(PA) was identified. Reaction pathways of dibutyl phthalate degradation by microwave-induced ClO₂ catalytic oxidation were proposed. A single electron transfer reaction is produced firstly in DBP degradation by microwave-induced ClO₂ catalytic oxidation system, followed by a free radical oxidation. It is believed that the radicals formed in microwave-induced ClO₂ catalytic oxidation reaction maintain the attack on the alkyl chain rather than the aromatic ring of DBP.

Key words: microwave, induction, ClO₂, dibutyl phthalate, catalysis, degradation

中图分类号: 

• X703