Department of Chemical Engineering, Inha University, Incheon, 22201, Republic of Korea.
Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Yuseoung-Gu, Daejeon, 305-764, Republic of Korea.
Chemosphere. 2021 Feb;265:129161. doi: 10.1016/j.chemosphere.2020.129161. Epub 2020 Dec 2.
A new porphyrinic porous organic polymer (PPOP) with high stability and excellent textural properties (929 m/g surface area with 0.73 cm/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, N adsorption-desorption isotherms, scanning electron microscopy, infrared spectroscopy, X-ray photoelectron spectroscopy, and solid-state 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.
一种新型的卟啉多孔有机聚合物（PPOP）具有高稳定性和优异的结构性能（表面积为 929 m²/g，孔体积为 0.73 cm³/g），是通过傅克反应制备的，并应用于水中双酚 A（BPA）的吸附。该材料通过 X 射线衍射、N2 吸附-解吸等温线、扫描电子显微镜、红外光谱、X 射线光电子能谱和固态 C CP-MAS 核磁共振光谱进行了研究。结果表明，PPOP 是一种高效的吸附剂，能够有效吸附水中的 BPA。Langmuir 模型能够很好地拟合吸附等温线数据，在 25°C 时的吸附量约为 653mg/g。BPA 在 50 分钟内被吸附了约 95%，准二级动力学模型很好地描述了吸附行为。这个吸附过程是放热的（ΔH°=-39.10 kJ/mol），随着 pH 值的增加，吸附容量逐渐降低。光谱分析表明，BPA 在 PPOP 上的吸附受以下因素影响：（1）BPA 与 PPOP 中芳香族成分之间的π-π 相互作用；（2）PPOP 中卟啉单元的 N 位点与 BPA 中羟基之间的氢键；（3）疏水相互作用。PPOP 经丙酮洗涤后易于再生，在五次重复吸附-解吸循环中，效率均>98%。
