Effects of environmental organic matters on the distribution of bisphenol A in soil-water interface

  • 周 晏如

Student thesis: Master's Thesis


Bisphenol A (BPA) is widely used by the industry to make plastics and epoxy resins Due to the structural similarity to human estrogen it can interfere with normal hormonal processes and therefore is recognized as a postulated endocrine-disrupting chemical BPA is an organic compound having two phenolic functional groups and having a low to moderate degree of mobility in soil Several approaches including adsorption and partition models have been developed to estimate the distribution of BPA and to predict its mobility in the soil-water interface In this work we collected and analyzed environmental samples including surface water sediment/soil and soil pore water from two rivers (Yanshuei river and Jishuei river in Tainan Taiwan) to test the hypothesis that the amount of organic content is in general proportional to the concentration of BPA in both liquid and solid phases An accelerated solvent extractor was used to extract BPA from sediment/soil samples and the quantification of BPA was conducted by HPLC with a fluorescence detector Excitation-emission matrix (EEM) fluorescence spectroscopy was used to characterize dissolved organic matter (DOM) in water samples A stable and high recovery rate (between 62 3% - 124%) from 69 soil/sediment samples was obtained Positive correlation was found between BPA concentration and organic carbon content in solid phase The BPA concentration in Yanshuei river samples of which average organic content in sediment was 1 27% was generally higher than that in Jishuei river samples of which average organic content in sediment was 0 56% However the slope calculated from soil-water distribution was 25 0 L/kg for Yanshuei river and 34 6 L/kg for Jishuei river suggesting that BPA tended to accumulate in solid phase in the Jishuei river area EEM analysis results showed there were more microbial by-product-like substances in Yanshuei river samples which may help BPA stay in the liquid phase As we concentrate the BPA in sediment into organic phase and plot with BPA concentration in pore water highly positive correlation were observed under the classification of river basin and rainfall
Date of Award2016 Aug 4
Original languageEnglish
SupervisorWan-Ru Chen (Supervisor)

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