Characteristics Of Sorption Of Phthalic Acid Esters On Shallow Aquifer Sediment

Environmental hormone is a class of chemical compounds in environment. It may affect human and animal on their normal endocrines, leading to reproductive, developmental and behavioral disorder. For Environmental hormone are harmful to human beings and animals, the research of EDCs is worldwide concerned.Phthalic acid esters (PAEs) are an important group of environment hormones. Their main application is as plasticizers in the manufacture of plastics. In recent years, large amount of plastic acid esters have caused a wide distributions in the world. It can enter human body through breathing, diet and skin. Because there is not chemical bond exist between PAEs and Plastic products. They just joined together with the hydrogen key and vander Waals force. It will be dissolved out in suitable organic solvent and cause pollution to the environment, living beings and food. they have been found in sediments, natural waters, soils, aquatic organism and ground waters, PAEs have become one of the most prevalent contaminants or the second PCBs pollutants.Groundwater is an important part resource in China for the survival of human, two thirds of the population are living with groundwater for drinking water, groundwater pollution and its prevention have attracted the world's governments' and the public's attention. This thesis aims at the study of characteristics of PAEs in Jianghan plain water and sediment, we studied sorption behavior of five PAEs on Shallow aquifer sediment, including DMP,DEP,DBP,DIBP and DEHP, which have high contents and detection rates.This thesis about the study of sorption of 5 PAEs on shallow aquifer sediment are as follows:1. Chapter one introduced the physiological function, existence manner, harm and analytical methods of phthalatic acid esters, summarized the recent advance of analysis method of PAEs in the world and the sorption study on some adsorption materials.2. Adsorption kinetics and adsorption isotherms of DMP, DEP, DBP, DIBP and DEHP on the shallow aquifer sediment of Jianghan Plain were studied with reverse-phase high performance liquid chromatography. Results showed that parabolic equation has the best correlation coefficient, it means that the adsorption process is restricted by the diffusion mechanism. The results of the study of batch sorption experiment showed that the adsorption isotherms of five PAEs on shallow aquifer sediment are well fitted linear model.The correlation coefficient of 5 PAEs on 6 shallow aquifer sediment between 0.6744 and 0.8822, Kd (sediment and water distribution coefficient) on the same shallow aquifer sediment are as follows: DEP