微波协同Fenton降解邻苯二甲酸二甲酯及协同机理研究

发布时间：2018-04-19 08:59

  本文选题：邻苯二甲酸二甲酯(DMP) + 微波(MW)　； 参考：《青岛理工大学》2015年硕士论文

【摘要】：邻苯二甲酸二甲酯(Dimethyl Phthalate,DMP)被广泛地用作塑胶制品添加剂来提高塑料制品的塑性和强度,可扩散到环境中造成对水环境、大气环境及土壤的污染。此外研究表明,DMP是一种重要的内分泌干扰素,可以导致机体生殖系统异常,免疫机能下降,引发癌症等环境疾病。基于此,本课题开展微波协同Fenton试剂氧化降解DMP及协同机理的研究。首先研究了微波降解DMP反应,然后研究了Fenton降解DMP反应,考察了Fe2+浓度、Fe2+与H2O2投量比、反应液初始p H、Fenton试剂投加量以及DMP初始浓度对Fenton试剂降解DMP效率的影响.并简要分析了Fenton/类Fenton体系在UV作用下对DMP的降解效果,最后以一级反应动力学模型建立Fenton降解DMP表观动力学方程。最后研究了微波协同Fenton降解DMP反应,考察了Fe2+浓度、H2O2浓度、反应液p H、DMP初始浓度及微波功率对DMP降解效率的影响,在此基础上分别引入Fe2+、Cu2+等重金属离子对比性分析了微波-Fenton试剂对DMP的降解效率。通过体系中Fe2+、H2O2浓度及p H变化分析了微波-Fenton协同作用机理,根据DMP降解色谱图对降解过程也做了探索性研究。结果表明,当DMP初始浓度为2 mg/L、Fe2+浓度为2.5 mg/L、Fe2+与H2O2投量比为1:10、溶液初始p H为3、反应30 min,Fenton试剂降解DMP的效率可达96.08%。Fenton/类Fenton体系在UV作用下降解DMP效率较无UV作用相比提高率超过30%。Fenton降解DMP反应表观动力学方程为lnc0/c=f(c0,n,p H)=2.068c0-0.7928n-1.4157(p H)0.6336,同时结果表明,当Fe2+浓度为2 mg/L、H2O2浓度20 mg/L、反应液初始p H为3、微波功率为385 W、DMP初始浓度为1mg/L、反应30 min时,微波-Fenton降解DMP效率可达96.21%;降解反应较好的遵循一级反应动力学方程;微波场中Fe2+与Fe3+间的快速循环是微波协同Fenton降解DMP的主要原因。
[Abstract]:Dimethyl dimethyl phthalate (Dimethyl Phthalate DMP) is widely used as a plastic additive to improve the plasticity and strength of plastic products, which can spread to the environment and cause pollution to water environment, atmosphere environment and soil.In addition, DMP is an important endocrine interferon, which can lead to abnormal reproductive system, decreased immune function and lead to cancer and other environmental diseases.Based on this, microwave synergistic Fenton reagent oxidation degradation of DMP and synergistic mechanism were carried out.The microwave degradation of DMP was studied, then the degradation of DMP by Fenton was studied. The effects of the ratio of Fe2 concentration of Fe _ 2 to H2O2, the initial dosage of p-H _ (+) Fenton reagent and the initial concentration of DMP on the DMP degradation efficiency of Fenton reagent were investigated.The degradation effect of Fenton/ Fenton system on DMP under UV irradiation was briefly analyzed. Finally, the apparent kinetics equation of Fenton degradation of DMP was established by the first-order reaction kinetics model.Finally, the effects of microwave and Fenton on the degradation of DMP were studied. The effects of Fe2 concentration and H2O2 concentration, initial concentration of reaction solution and microwave power on the degradation efficiency of DMP were investigated.On this basis, the degradation efficiency of DMP by microwave-Fenton reagent was analyzed by introducing heavy metal ions such as Fe2 and Cu2 respectively.The synergistic mechanism of microwave-Fenton was analyzed by the concentration of Fe2 and H _ 2O _ 2 in the system and the degradation process was also studied according to the DMP degradation chromatogram.The results show thatWhen the initial concentration of DMP is 2 mg / L Fenton 2, the ratio of Fe 2 to H2O2 is 1: 10, and the initial pH of solution is 3, the efficiency of DMP degradation by Fenton reagent in 30 min reaction is higher than that of DMP degradation in 96.08%.Fenton/ Fenton system under UV irradiation.The apparent kinetic equation of 30%.Fenton degradation of DMP is lnc0 / cnc0 / H)=2.068c0-0.7928n-1.4157(p H ~ (0.6336), and the results show that,When the concentration of Fe2 is 20 mg / L, the initial pH of the reaction solution is 3, the microwave power is 385W / L, the initial concentration of DMP is 1 mg / L, and the reaction time is 30 min, the degradation efficiency of DMP by microwave Fenton can reach 96.21g / L, and the degradation reaction follows the first order reaction kinetics equation.The rapid cycle between Fe2 and Fe3 in microwave field is the main reason for DMP degradation by microwave synergistic Fenton.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X505

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