Nie Wenjie, Liu Jiao, Bai Xue, Xing Zefeng, Gao Ying
College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China.
Department of Teaching Quality Evaluation, Yan'an University, Yan'an 716000, China.
Polymers (Basel). 2022 Jan 5;14(1):203. doi: 10.3390/polym14010203.
Adsorption is an effective method to remove tetracycline (TC) from water, and developing efficient and environment-friendly adsorbents is an interesting topic. Herein, a series of novel phenyl porous organic polymers (P-POPs), synthesized by one-pot polymerization of different ratios of biphenyl and triphenylbenzene under AlCl catalysis in CHCl, was studied as a highly efficient adsorbent to removal of TC in water. Notably, the obtained POPs possessed abundant phenyl-containing functional groups, large specific surface area (1098 m/g) with abundant microporous structure, high pore volume (0.579 cm/g), favoring the removal of TC molecules. The maximum adsorption capacity (fitted by the Sips model) could achieve 581 mg/g, and the adsorption equilibrium is completed quickly within 1 h while obtaining excellent removal efficiency (98%). The TC adsorption process obeyed pseudo-second-order kinetics and fitted the Sips adsorption model well. Moreover, the adsorption of POPs to TC exhibited a wide range of pH (2-10) adaptability and outstanding reusability, which could be reused at least 5 times without significant changes in structure and efficiency. These results lay a theoretical foundation for the application of porous organic polymer adsorbents in antibiotic wastewater treatment.
吸附是从水中去除四环素（TC）的有效方法，开发高效且环境友好的吸附剂是一个有趣的课题。在此，通过在CHCl中AlCl催化下不同比例的联苯和三苯基苯一锅聚合合成了一系列新型苯基多孔有机聚合物（P-POPs），并将其作为去除水中TC的高效吸附剂进行了研究。值得注意的是，所获得的POPs具有丰富的含苯基官能团、大的比表面积（1098 m²/g）以及丰富的微孔结构、高孔容（0.579 cm³/g），有利于TC分子的去除。最大吸附容量（由Sips模型拟合）可达581 mg/g，吸附平衡在1小时内迅速完成，同时获得优异的去除效率（98%）。TC吸附过程符合准二级动力学，并且与Sips吸附模型拟合良好。此外，POPs对TC的吸附表现出广泛的pH（2-10）适应性和出色的可重复使用性，可至少重复使用5次，结构和效率无明显变化。这些结果为多孔有机聚合物吸附剂在抗生素废水处理中的应用奠定了理论基础。
