Study on Concentration and Distribution Characteristics of Bisphenol Compounds in Irrigation Ditch Water

Abstract

【Objective】 Bisphenol compounds of different origins have been found in many terrestrial ecosystems in across China. Their accurate detection is a key to mitigating their impact on the environment. In this paper, we present an improved method to reliably detect BPs in water and sediment in irrigation districts. 【Method】 A high-performance liquid chromatography-fluorescence (HPLC-FLD) method was established for simultaneously measuring three types of bisphenol compounds. Suitable pre-treatment method for detecting these compounds was selected from the filtration method and centrifugation method by comparing their efficiency. The tested method was then used to analyze main bisphenol compounds in water and sediment samples taken from vegetable and paddy fields. 【Result】 The HPLC-FLD can detect BPS when its concentration is not lower than 0.2 µg/L, while for BPF and BPA, the method can detect them when their concentrations are as low as 0.2 µg/L. The centrifugation method can recover 76.69% to 99.03% of the water from the samples, and the detection rate for BPF in ditch water and sediment is 100% and 88.89%, respectively. The greatest BPs concentration the method can detect is 1.45 µg/L for water samples and 587.4 µg/kg for sediment samples. The contents of BPF, BPA and BPS in the sediment samples are 962.95 times, 871.82 times and 72.81 times those in the water samples, respectively. 【Conclusion】 The centrifugation method works better for pretreating the samples. BPF is the main BPs detected in water and sediment samples taken from the vegetable and paddy fields. BPs in sediments are substantially higher than in water.

Keywords

• liquid chromatography
• bisphenols
• environmental hormones
• irrigation