Effects of bisphenol a on dissolved organic matter fluorescence characteristics using parallel factor analysis (PARAFAC) modeling

The effects of bisphenol A (BPA) on dissolved organic matter (DOM) fluorescence spectroscope were studied in this paper. Dissolved organic matter was water-extracted from soil and plants near the Beiheng river bank of Chongming Island. The results show that BPA could significantly decrease the DOM fluorescence intensity. Parallel factor analysis (PARAFAC) is a new and sensitive method to decompose the fluorescence matrices of DOM florescence spectroscope into different fluorescent components. In this study, two humic-like components (C1 and C2) and one protein-like component (C3) of DOM fluorescence were identified by using PARAFAC modeling. The relative decrease of components fluorescence after BPA treatment is dependent on the fraction of DOM. The protein-like fluorescent component is more active than humic-like components in the reaction of BPA and DOM. This research reveals that PARAFAC analysis is a fast and useful tool to inspect the interactions of xenobiotics and DOM fractions in water systems.