Sorption Constant of Bisphenol A and Octylphenol Onto Size-Fractioned Dissolved Organic Matter Using a Fluorescence Method

Cheng-Wen Chuang, Wei-Shiang Huang, Hong-Sheng Chen, Liang-Fong Hsu, Yung-Yu Liu and Ting-Chien Chen
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Cheng-Wen Chuang: Department of Environmental Science and Engineering, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
Wei-Shiang Huang: Department of Environmental Science and Engineering, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
Hong-Sheng Chen: Department of Environmental Science and Engineering, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
Liang-Fong Hsu: Department of Applied English, Tainan University of Technology, Tainan 71002, Taiwan
Yung-Yu Liu: Department of Environmental Science and Engineering, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
Ting-Chien Chen: Department of Environmental Science and Engineering, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan

IJERPH, 2021, vol. 18, issue 3, 1-14

Abstract: Dissolved organic matter (DOM) is a complex and heterogeneous mixture ubiquitously present in aquatic systems. DOM affects octylphenol (OP) and bisphenol A (BPA) distribution, transport, bioavailability, and toxicity. This study investigated OP and BPA sorption constants, log K COC , with three size-fractioned DOM. The molecular weights of the sized fractions were low molecular weight DOM (LDOM, <1 kDa), middle molecular weight DOM (MDOM, 1–10 kDa), and high molecular weight DOM (HDOM, 10 kDa–0.45 ?m). The log K COC ranged from 5.34 to 6.14 L/kg-C for OP and from 5.59 to 6.04 L/kg-C for BPA. The OP and BPA log K COC values were insignificantly different ( p = 0.37) and had a strong positive correlation (r = 0.85, p < 0.001). The OP and BPA LDOM log K COC was significantly higher than the HDOM and MDOM log K COC ( p = 0.012 for BPA, p = 0.023 for OP). The average specific ultraviolet absorption (SUVA 254 ) values were 32.0 ± 5.4, 13.8 ± 1.0, and 17.9 ± 2.8 L/mg-C/m for LDOM, MDOM, and HDOM, respectively. The log K COC values for both OP and BPA had a moderately positive correlation with the SUVA 254 values (r = 0.79–0.84, p < 0.002), which suggested the aromatic group content in the DOM had a positive impact on sorption behavior.

Keywords: bisphenol A; octylphenol; fluorescence quenching; dissolved organic matters; UV/Vis indicators (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
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