天然水中邻苯二甲酸酯类检测分析及DEHP光降解研究

发布时间：2018-06-12 04:03

本文选题：邻苯二甲酸酯 + GC-MS　；参考：《温州大学》2017年硕士论文

【摘要】：邻苯二甲酸酯及其代谢物具有环境激素的作用,它们会干扰生物和人类的内分泌系统,已被公认为是全球性污染物。本文建立了液液萃取-气相色谱-质谱法(LLE-GC-MS)同时测定环境水中邻苯二甲酸酯及其代谢物的分析方法。并用该方法在雨水、温瑞塘河中均有检测到DiBP、DBP、DEHP。并对其中使用量最大的化合物邻苯二甲酸二-(2-乙基己基)酯(DEHP)进行了光降解研究。本文研究了在模拟太阳光下溶液pH、Fe3+、NO3-、Cl-、FA (富里酸)等因素对DEHP光降解影响,并进一步通过抑制实验证实了Fe3+、NO3-、Cl-、FA等对水中DEHP光降解影响机理。实验结果表明:DEHP在酸性条件下降解较快;Fe3+、N03-、C1-随着浓度增大会促进DEHP光降解,Fe3+和NO3-通过在光照下产生·OH促进DEHP降解;C1-可能是通过在光照下产生的ClΛ促进DEHP降解;FA既有促进DEHP降解作用,也有一定的抑制作用,抑制实验表明FA在光照下产生的3FA*(三重激发态富里酸)促进DEHP降解。
[Abstract]:Phthalates and their metabolites have the role of environmental hormones, they will interfere with biological and human endocrine system, has been recognized as a global pollutant. A method for simultaneous determination of phthalates and their metabolites in environmental water by liquid-liquid extraction gas chromatography-mass spectrometry (LLE-GC-MS) was developed. The method was used to detect DiBP-DBP in Rain Water and Wenruitang River. The photodegradation of DEHP, one of the most widely used compounds, was studied. In this paper, the effect of pH (Fe _ 3) _ 3 (Fe _ (3) _ (no _ (3) _ (Cl-C) _ (FA) on the photodegradation of DEHP in water was studied in simulated solar light. The experimental results show that the degradation of Fe _ 3H _ 3N _ 03-N _ 1- under acidic conditions will promote the photodegradation of Fe _ 3 and no _ 3- by producing OH to promote the degradation of C _ 1- in the presence of light. It may be that the degradation of Fa ~ (3 +) is promoted by Cl _ (A) produced under light. It can promote the degradation of DEHP, The inhibition experiment showed that 3FAA (triple excited fulvic acid) produced by FA promoted the degradation of DEHP.
【学位授予单位】：温州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O657.63;X832

【参考文献】