Magnetic Fe3O4/bamboo-based activated carbon/UiO-66 composite as an environmentally friendly and effective adsorbent for removal of Bisphenol A

• Published in: Chemosphere (Oxford) 2023-11, Vol.340, p.139696-139696, Article 139696
• Main Authors: Zhang, Yao, Hu, Xinyu, Wang, Hongbin, Li, Jiaxiong, Fang, Shuju, Li, Guizhen
• Format: Article
• Language: English
• Subjects: Adsorption; Bamboo based activated carbon; Bisphenol A; Fe3O4; Magnetic; UiO-66
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2023.139696

The magnetic Fe3O4/bamboo-based activated carbon/Zr-based metal-organic frameworks composite (Fe3O4/BAC/UiO-66) was prepared by hydrothermal method. The as-prepared material was analyzed via TEM, XRD, FT-IR, BET-BJH, VSM and XPS techniques, the results showed that it had good dispersion and magnetic separation capacity (Ms = 44.06 emu∙g-1). Then, the adsorption properties of materials for bisphenol A (BPA) were studied. The results revealed that the removal efficiency of 50 mg·L-1 BPA by 0.1 g of adsorbent can reach 87.18–95% in a wide pH range. Langmuir isotherm model and pseudo-second-order kinetic well fitted the adsorption data. The thermodynamic data indicated that the adsorption process was spontaneous and endothermic. Moreover, BAC as a supporter and UiO-66 as the functional part in the ternary composite may have a synergistic effect, which was beneficial for the removal of contaminants. The Fe3O4/BAC/UiO-66 can be simply separated from the water using its strong magnetism after finish adsorption process, which effectively avoids secondary contamination. [Display omitted] •The magnetic Fe3O4/bamboo-based activated carbon/Zr-based metal-organic frameworks composite (Fe3O4/BAC/UiO-66) was prepared by a simple hydrothermal method.•In the composite adsorbent, BAC was the main adsorbent, and the addition of UiO-66 promoted an increase in specific surface area which improved the adsorption performance. Meanwhile, Fe3O4 gave the adsorbent strong magnetic property (Ms = 44.06emu∙g−1) and can be simply separated from the solution by an applied magnetic field, effectively avoiding secondary contamination.•In a wide pH range, the removal efficiency of 50 mg L−1 by 0.1 g of adsorbent can reach 95%.