中文摘要：

本文主要研究了邻苯二甲酸二丁酯（DBP）在氧化体系（乙腈，水）、还原体系（甲醇，水、特丁醇／水）、纯水三种体系下的电子束辐射降解效应。用HPLC测定了四种溶液下DBP在电子束辐射前后的浓度，GC／MS对乙腈／水、甲醇／水、和纯水溶液的辐射降解产物进行了分析。结果表明：DBP辐射降解遵循一级动力学方程。在辐照剂量仅仅为0．5kGy时，DBP浓度为7．8mg／L时，除特丁醇／水溶液外，DBP降解率已经达到85％以上。三种溶液下的降解产物都有邻苯二甲酸二乙酯、邻苯二甲酸单丁酯、邻苯二甲酸二异丁酯。最后对DBP的电子束辐射降解机理作了初步探讨。

英文摘要：

E-beam degradation of dibutyl phthalate （DBP） in oxidation system （acetonitrile/water）, reduction system （methanol/water, t-BuOH/water）, and pure water systems was investigated. DBP concentration in the four solutions was determined by HPLC, and the degradation products were analyzed by GC/MS. The results showed that the DBP degradation followed pseudo-first-order kinetics. DBP in a concentration of 7.Smg/L, in all solutions but the t-BuOH/water, could be degraded in a rate of over 85% by 0.5 kGy E-beam irradiation The degradation products included diethyl phthalate, bis（2-methylpropyl）ester, and 1,2-Benzenedicarboxylc acid in the three solutions. Finally, mechanism of the DBP degradation was discussed.