Zhu Yating, Shen Jia, Guo Manli, Zheng Haoling, Cao Yujuan
School of Chemistry, Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, South China Normal University, Guangzhou, 510006, People's Republic of China.
Environ Sci Pollut Res Int. 2023 Feb;30(10):27315-27327. doi: 10.1007/s11356-022-24093-3. Epub 2022 Nov 15.
In this work, nitrogen-doped magnetic porous carbon material (N-MPC) was prepared through the high-temperature calcination of low-cost [Fe(CN)]-loaded anion-exchange resin, which was experimentally demonstrated to have significant adsorption performance for tetracycline (TC) in water. The N-MPC adsorbent with a large specific surface area (781.1 m g) was able to maintain excellent performance in a wide pH range from 4 to 10 or in high ionic strength solution. The adsorption of TC on N-MPC was found to be more consistent with the pseudo-second-order model and Langmuir adsorption model, and the maximum adsorption capacity (q) was calculated to be 603.4 mg g. As a recoverable magnetic adsorbent, the N-MPC remained a TC removal rate higher than 70% after four adsorption cycles. The adsorption mechanism was speculated on the basis of characterizations, where pore filling, hydrogen bonding interaction, and π-π electron donor-acceptor (EDA) interaction were crucial adsorption mechanisms. A variety of antibiotics were selected for adsorption, and excellent performance was found especially for TCs, indicating that the N-MPC can be used for the efficient removal of TCs from water.
在本工作中，通过对负载[Fe(CN)]的低成本阴离子交换树脂进行高温煅烧制备了氮掺杂磁性多孔碳材料（N-MPC），实验证明其对水中四环素（TC）具有显著的吸附性能。具有大比表面积（781.1 m²/g）的N-MPC吸附剂在4至10的宽pH范围内或在高离子强度溶液中能够保持优异的性能。发现TC在N-MPC上的吸附更符合准二级模型和朗缪尔吸附模型，计算得出的最大吸附容量（q）为603.4 mg/g。作为一种可回收的磁性吸附剂，N-MPC在四个吸附循环后仍保持高于70%的TC去除率。基于表征推测了吸附机理，其中孔隙填充、氢键相互作用和π-π电子供体-受体（EDA）相互作用是关键的吸附机理。选择了多种抗生素进行吸附，发现对四环素类表现出优异的性能，表明N-MPC可用于从水中高效去除四环素类。
