School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, PR China.
School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, PR China.
Int J Biol Macromol. 2021 Apr 1;175:396-405. doi: 10.1016/j.ijbiomac.2021.01.215. Epub 2021 Feb 2.
To remove the bisphenol AF (BPAF) from aqueous solution, two different types of lignin-based aromatic porous polymers (LAPP-1 and LAPP-2) were fabricated via one-pot crosslinking of lignin with 1,4-dichloroxylene and 4,4'-bis(chloromethyl)-1,1'-biphenyl, respectively. The successful synthesis of LAPPs was confirmed by FTIR and XPS, SEM, TEM and N adsorption-desorption analysis. Then, batch adsorption experiments were conducted to investigate adsorption properties toward BPAF. Based on the results, the adsorption processes were in accordance with the pseudo-second-order kinetic model and the Freundlich isotherm model, and the thermodynamic studies showed that the adsorption was a spontaneous and exothermic process. It is remarkable that LAPPs exhibited good adsorption performance in wide ranges of pH and ionic strength as well as in recycling process. Notably, compared to LAPP-1, LAPP-2 exhibited higher adsorption capacity for BPAF, which can be ascribed to its higher porosity and content of aromatic ring. Moreover, the comprehensive analysis of experimental and theoretical results indicated that the π-π interactions and pore adsorption may jointly drive the uptake process of BPAF. Considering the simple fabrication method employed and excellent BPAF adsorption performance, LAPPs provided new insights into the development of advanced lignin-based adsorbents for removal of BPAF from water.
为了从水溶液中去除双酚 AF（BPAF），通过分别用 1,4-二氯苯和 4,4'-双（氯甲基）-1,1'-联苯与木质素一锅交联，制备了两种不同类型的基于木质素的芳香多孔聚合物（LAPP-1 和 LAPP-2）。通过 FTIR 和 XPS、SEM、TEM 和 N 吸附-解吸分析证实了 LAPP 的成功合成。然后，进行了批量吸附实验以研究对 BPAF 的吸附性能。基于实验结果，吸附过程符合准二级动力学模型和 Freundlich 等温线模型，热力学研究表明吸附是自发和放热的过程。值得注意的是，LAPPs 在宽 pH 和离子强度范围以及在回收过程中表现出良好的吸附性能。值得注意的是，与 LAPP-1 相比，LAPP-2 对 BPAF 表现出更高的吸附容量，这可以归因于其更高的孔隙率和芳环含量。此外，实验和理论结果的综合分析表明，π-π 相互作用和孔吸附可能共同驱动 BPAF 的摄取过程。考虑到所采用的简单制造方法和优异的 BPAF 吸附性能，LAPP 为开发用于从水中去除 BPAF 的先进木质素基吸附剂提供了新的思路。
