Aqueous adsorption of bisphenol A over a porphyrinic porous organic polymer. (February 2021)

• Record Type: Journal Article
• Authors: Lee, Myeong Yeon; Ahmed, Imteaz; Yu, Kwangsun; Lee, Chang-Soo; Kang, Kyoung-Ku; Jang, Min-Seok; Ahn, Wha-Seung
• Is Part Of: Chemosphere. Volume 265(2021)
• Publication Date: 2021-02
• Subjects: Bisphenol A -- Aqueous phase adsorption -- Porous organic polymer -- Hydrogen bonding -- π-π interaction; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2020.129161
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: A new porphyrinic porous organic polymer (PPOP) with high stability and excellent textural properties (929 m 2 /g surface area with 0.73 cm 3 /g pore volume) was made via the Friedel-Crafts reaction and applied for bisphenol A (BPA) adsorption in water. The material was examined by X-ray diffraction, N2 adsorption-desorption isotherms, scanning electron microscopy, infrared spectroscopy, X-ray photoelectron spectroscopy, and solid-state 13 C CP-MAS nuclear magnetic resonance spectroscopy. PPOP was proven highly effective for capturing BPA among the many adsorbent materials investigated. The Langmuir model could closely match the adsorption isotherm data with a high adsorption amount of ca. 653 mg/g at 25 °C. Approximately 95% of BPA was adsorbed in 50 min, and the pseudo-second-order kinetic model satisfactorily described the adsorption behavior. This adsorption process was exothermic ( ΔH° = −39.10 kJ/mol), and the capacity gradually decreased with increasing pH. Spectroscopic analyses indicated that the BPA adsorption on PPOP was affected by (1) π-π interaction between BPA and the aromatic constituents of PPOP, (2) hydrogen bonding between the N sites of porphyrin units in PPOP and the hydroxyl group of BPA and, and (3) hydrophobic interactions. PPOP was easily regenerated after acetone washing, and >98% efficiency was observed throughout the five repeated adsorption-desorption cycles. Graphical abstract: Image 1 Highlights: A new porphyrinic porous organic polymer (PPOP) was synthesized via Friedel-Crafts reaction. PPOP was applied for the removal of bisphenol A from water. Fast adsorption kinetics to reach an equilibrium in 150 min. The high adsorption capacity of 653 mg/g was achieved. PPOP was recyclable after acetone washing without loss of adsorption capacities.