超声波/Fenton工艺降解微量邻苯二甲酸二甲酯和壬基酚效能的研究

Study on the performance of US/Fenton process for trace DMP and NP degradation

研究了在超声波、Fenton不同体系中邻苯二甲酸二甲酯(DMP)和壬基酚(NP)的降解效果。通过正交实验得到超声波/Fenton工艺各个因素影响程度的大小为:H2O2投加量>初始pH>反应时间>Fe2+投加量>超声功率。最后得到降解250mL质量浓度为100μg/L的DMP的最佳条件:H2O2投加量为2mmol/L、Fe2+投加量为0.40mmol/L、初始pH为3.00、超声功率为1 800W、反应时间为120min,降解率可达到85.96%;降解250mL质量浓度为100μg/L的NP的最佳条件:H2O2投加量为4mmol/L、Fe2+投加量为0.50mmol/L、初始pH为3.00、超声功率为1 800W、反应时间为120min,降解率可达到78.70%。

The degradation of NP and DMP in different advanced oxidation systems （US, Fenton, US/Fenton, US/Fe^2＋ and US/H2O2 system） was investigated. The orthogonal array experiments were designed to analyzed the influencing degree of each factors in US/Fenton system, the results showed that the influence of these factors followed the order of H2O2 dosage〉initial pH〉reaction time〉Fe^2＋ dosage〉ultrasonic power. The optimum degradation conditions for DMP solution （100μg/L, 250 mL） were H2O2 dosage of 2 mmol/L, Fe〉2＋ dosage of 0. 40 mmol/L, initial pH of 3.00, ultrasonic power of 1 800 W and reaction time of 120 min, under these optimum conditions, DMP degradation rate could reached to 85.96%. While, for NP solution （100 μg/L, 250 mL）, the optimum degradation conditions were H2O2 dosage of 4 mmol/L, Fe^2＋ dosage of 0.50 mmol/L, initial pH of 3.00, ultrasonic power of 1 800 W and reaction time of 120 rain, under these conditions, NP degradation rate could reach 78.70%.