Degradation of di-n-butyl phthalate in aqueous solution by the O3/UV process
Degradation of di-n-butyl phthalate in aqueous solution by the O3/UV process
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DOI：
10.1080/19443994.2013.826844
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发表时间：
2014-02
影响因子：
1.1
通讯作者：
Liang Wang;G. Y. Fu;Bin Zhao;Zhaohui Zhang;Xingfei Guo;Hongwei Zhang
中科院分区：
文献类型：
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作者：
Liang Wang;G. Y. Fu;Bin Zhao;Zhaohui Zhang;Xingfei Guo;Hongwei Zhang
摘要本研究采用臭氧氧化与紫外光照射相结合的方法（O3/UV）降解水环境中的重要污染物邻苯二甲酸二丁酯（DBP）。与臭氧氧化或紫外光照射相比，复合体系促进了O3分子的光解和羟基自由基的产生，从而显著增强了DBP的进攻降解.由于是一个更有力的氧化剂比O3，DBP的去除和矿化的动力学增加。随着O3水溶液的进料速率为4.03 mg/（L min），掺入的DBP分子在60 min内几乎完全消失，其中约70%转化为H2O和CO2。DBP浓度，水O3进料速率，和溶液pH值对DBP降解的影响进行了研究。假一级动力学模型能够较好地描述不同条件下的实验数据。共鉴定出8个中间体，DBP降解产物为β-环糊精。
AbstractThe degradation of di-n-butyl phthalate (DBP), which is a pollutant of concern in an aqueous environment, was investigated using the combination of ozonation with ultraviolet irradiation (O3/UV) in this study. Compared with either ozonation or UV irradiation, the hybrid system stimulated the O3 molecule photolysis and the hydroxyl radical () generation; therefore, the DBP degradation through the pathway of attack was markedly reinforced. Since was a more vigorous oxidant than O3, both the kinetics of the DBP removal and the mineralization were increased. With the aqueous O3 fed rate of 4.03 mg/(L min), the spiked DBP molecules almost completely disappeared in 60 min, approximately 70% of which were converted into H2O and CO2. The effects of DBP concentration, aqueous O3 fed rate, and solution pH on the DBP degradation were also investigated. Pseudo-first-order kinetics model was able to depict the experimental data under different conditions. Eight intermediates were identified, and the DBP degrad...