Fe^(2+)协同H_2O_2/O_3氧化降解水中邻苯二甲酸二甲酯

Research on the oxidation degradation of dimethyl phthalate in water by using Fe^(2+) coordinating with H_2O_2/O_3

采用Fe2+协同H2O2/O3氧化处理水中的邻苯二甲酸二甲酯(DMP),研究表明Fe2+的存在消除了H2O2对O3的抑制作用,并使H2O2/O3对DMP的去除率大幅提高了31.75%。DMP质量浓度为50 mg/L、初始pH为10、H2O2投加量为0.049 mol/L、O3投加量为1.82 g/h、Fe2+投加量为0.72 mmol/L、反应时间为45 min时,Fe2+-H2O2/O3对DMP的去除率可达69.67%。HCOO-、HCO3-可能影响.OH的形成,从而影响Fe2+-H2O2/O3体系对DMP的降解效果,NO3-、SO42-、Cl-对DMP的降解效果几乎无影响。

Fe^2＋ coordinating with H2O2/O3 has been used for the oxidation treatment of dimethyl phthalate （DMP） in water. The research indicates that the presence of Fe^2＋ eliminates the inhibition of H2O2 on O3 and an increases of 31.75% of the removal rate of DMP by H2O2/O3 is obtained. When the mass concentration of DMP is 50 mg/L, initial pH 10,H2O2 dosage 0.049 mol/L,O3 dosage 1.82 g/h,Fe^2＋ dosage 0.72 mmol/L,and reaction time 45 rain,the removal rate of DMP by Fe^2＋-H2O2/O3 system can reach 69.67%. HCOO^- and HCO3^- may have effect on the formation of ·OH and decrease the degradation of DMP by Fe^2＋- H2O2/O3 process. NO3^-,SO4^2-,and Cl- nearly have no effect on the degradation of DMP.