Studies on Degradation of Phthalate by ozonation and ozonation combined with ultraviolet radiation Using Capillary Electrophoresis
Using dimethyl phthalate (DMP) as a phthalic acid esters (PAEs) probe, two candidate processes, ozonation (O3) and O3 combined with ultraviolet radiation (O3/UV), were evaluated for their efficiency in removing DMP and mineralizing the degradation products. The DMP degradation intermediates and final products were determined by capillary electrophoresis (CE). The results showed that the removal of dimethyl phthalate in the aqueous solution by ozonation was efficient, and the oxidation of side-chains of DMP was the dominant mechanism of the process. The major intermediate—phthalic acid (PA) in the ozonation process could be degraded to the minor aliphatic acids. These aliphatic acids could not be decomposed by ozonation very well. In the O3/UV process, it was believed that the ester chain and the benzene ring of DMP concur to be oxidized by hydroxyl radical (·OH) and the aliphatic acids such as succinic acid and oxalic acid were produced. These aliphatic acids can be oxidized further to H2O and CO2 by hydroxyl radical (·OH).
dimethyl phthalate degradation products ozonation capillary electrophoresis
Haiyan Li Yintiao Shi Qingfu Zeng
Engineering Research Center for Clean Production of Textile Dyeing and Printing,Ministry of Education,Wuhan university of Science and Engineering,Wuhan 430073,P.R.China
国际会议
北京
英文
1-5
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）