The Construction of Magnetic MnFe2O4@TpPa-1 Composite Materials and the Adsorption Removal Performance of Organic Pollutants in Solution

• Published in: Nature environment and pollution technology 2021-12, Vol.20 (4), p.1465-1474
• Main Authors: Wang, Shuai, Wang, Huifang, Hu, Luzeng, Lu, Zhipeng, Qiu, Muqing, Zhong, Xin
• Format: Article
• Language: English
• Subjects: Adsorption; Bisphenol A; Chemical elements; Chemical precipitation; Chemisorption; Composite materials; Conjugation; Endothermic reactions; Equilibrium; Experiments; Fourier transforms; Functional groups; Hydrogen bonding; Pollutant removal; Pollutants; Pore size; Porous materials; Regeneration; Water treatment
• ISSN: 0972-6268; 2395-3454
• DOI: 10.46488/NEPT.20i04.008

MnFe2O4@TpPa-1 adsorbent was developed by co-precipitation and solvothermal method, using ß-ketoenamine linked covalent organic frameworks (COFs, TpPa-1) as supporting material to alleviate the aggregation of MnFe2O4. The properties were characterized by XRD, FT-IR, SEM, TEM, VSM, pHpzc, and N2 adsorption-desorption. The experimental results showed that the pseudo-second-order and Langmuir model best described the adsorption process, suggesting that the adsorption process was chemisorption and spontaneous endothermic reaction, and the maximum adsorption capacity of Bisphenol A (BPA) was 926.65 mg.g-1. The main adsorption mechanism of BPA was hydrogen bonding and π-π conjugation between active functional groups in the TpPa-1 skeleton and BPA. Furthermore, the magnetic MnFe2O4@TpPa-1 showed good regeneration ability, indicating that MnFe2O4@TpPa-1 could be used in water treatment.