Abstract:

Fe²⁺ coordinating with H₂O₂/O₃ has been used for the oxidation treatment of dimethyl phthalate（DMP） in water. The research indicates that the presence of Fe²⁺ 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/hFe²⁺ dosage 0.72 mmol/L，and reaction time 45 min，the removalrate of DMP by Fe²⁺-H₂O₂/O₃ system can reach 69.67%. HCOO^- and HCO^3- may have effect on the formation of·OH and decrease the degradation of DMP by Fe2+- H2O2/O3 process. NO^3-、SO₄^2-、and Cl^- nearly have no effect onthe degradation of DMP.

Key words: dimethyl phthalate, degradation, Fe²⁺, H₂O₂/O₃

摘要：

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^-、HCO^3-可能影响.OH的形成,从而影响Fe²⁺-H₂O₂/O₃体系对DMP的降解效果,NO^3-、SO₄^2-、Cl^-对DMP的降解效果几乎无影响。

关键词: 邻苯二甲酸二甲酯\降解, Fe²⁺, H₂O₂/O₃

CLC Number: 

• X703.1