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Article

Microfiltration Membranes for the Removal of Bisphenol A from Aqueous Solution: Adsorption Behavior and Mechanism

1
School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China
2
School of Architecture and Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
*
Author to whom correspondence should be addressed.
Academic Editor: Margaritis Kostoglou
Water 2022, 14(15), 2306; https://doi.org/10.3390/w14152306
Received: 1 July 2022 / Revised: 16 July 2022 / Accepted: 22 July 2022 / Published: 25 July 2022
(This article belongs to the Section Wastewater Treatment and Reuse)
This study mainly investigated the adsorption behavior and mechanism of microfiltration membranes (MFMs) with different physiochemical properties (polyamide (PA), polyvinylidene fluoride (PVDF), nitrocellulose (NC), and polytetrafluoroethylene (PTFE)) for bisphenol A (BPA). According to the adsorption isotherm and kinetic, the maximum adsorption capacity of these MFMs was PA (161.29 mg/g) > PVDF (80.00 mg/g) > NC (18.02 mg/g) > PTFE (1.56 mg/g), and the adsorption rate was PVDF (K1 = 2.373 h−1) > PA (K1 = 1.739 h−1) > NC (K1 = 1.086 h−1). The site energy distribution analysis showed that PA MFMs had the greatest adsorption sites, followed by PVDF and NC MFMs. The study of the adsorption mechanism suggested that the hydrophilic microdomain and hydrophobic microdomain had a micro-separation for PA and PVDF, which resulted in a higher adsorption capacity of PA and PVDF MFMs. The hydrophilic microdomain providing hydrogen bonding sites and the hydrophobic microdomain providing hydrophobic interaction, play a synergetic role in improving the BPA adsorption. Due to the hydrogen bonding force being greater than the hydrophobic force, more hydrogen bonding sites on the hydrophobic surface resulted in a higher adsorption capacity, but the hydrophobic interaction contributed to improving the adsorption rate. Therefore, the distribution of the hydrophilic microdomain and hydrophobic microdomain on MFMs can influence the adsorption capacity and the adsorption rate for BPA or its analogues. These consequences provide a novel insight for better understanding the adsorption behavior and mechanism on MFMs. View Full-Text
Keywords: microfiltration membranes; bisphenol A; adsorption mechanism; hydrogen bonding; hydrophobic interaction microfiltration membranes; bisphenol A; adsorption mechanism; hydrogen bonding; hydrophobic interaction
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MDPI and ACS Style

Sun, J.; Jiang, X.; Zhou, Y.; Fan, J.; Zeng, G. Microfiltration Membranes for the Removal of Bisphenol A from Aqueous Solution: Adsorption Behavior and Mechanism. Water 2022, 14, 2306. https://doi.org/10.3390/w14152306

AMA Style

Sun J, Jiang X, Zhou Y, Fan J, Zeng G. Microfiltration Membranes for the Removal of Bisphenol A from Aqueous Solution: Adsorption Behavior and Mechanism. Water. 2022; 14(15):2306. https://doi.org/10.3390/w14152306

Chicago/Turabian Style

Sun, Jiaoxia, Xueting Jiang, Yao Zhou, Jianxin Fan, and Guoming Zeng. 2022. "Microfiltration Membranes for the Removal of Bisphenol A from Aqueous Solution: Adsorption Behavior and Mechanism" Water 14, no. 15: 2306. https://doi.org/10.3390/w14152306

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