School of Environmental and Materials Engineering, Yantai University, Yantai 264005, China.
School of Civil Engineering, Yantai University, Yantai 264005, China.
Molecules. 2023 Apr 7;28(8):3290. doi: 10.3390/molecules28083290.
Chloroquine phosphate (CQP) is effective in treating coronavirus disease 2019 (COVID-19); thus, its usage is rapidly increasing, which may pose a potential hazard to the environment and living organisms. However, there are limited findings on the removal of CQP in water. Herein, iron and magnesium co-modified rape straw biochar (Fe/Mg-RSB) was prepared to remove CQP from the aqueous solution. The results showed that Fe and Mg co-modification enhanced the adsorption efficiency of rape straw biochar (RSB) for CQP with the maximum adsorption capacity of 42.93 mg/g (at 308 K), which was about two times higher than that of RSB. The adsorption kinetics and isotherms analysis, as well as the physicochemical characterization analysis, demonstrated that the adsorption of CQP onto Fe/Mg-RSB was caused by the synergistic effect of pore filling, π-π interaction, hydrogen bonding, surface complexation, and electrostatic interaction. In addition, although solution pH and ionic strength affected the adsorption performance of CQP, Fe/Mg-RSB still had a high adsorption capability for CQP. Column adsorption experiments revealed that the Yoon-Nelson model better described the dynamic adsorption behavior of Fe/Mg-RSB. Furthermore, Fe/Mg-RSB had the potential for repeated use. Therefore, Fe and Mg co-modified biochar could be used for the remediation of CQP from contaminated water.
磷酸氯喹（CQP）在治疗 2019 年冠状病毒病（COVID-19）方面有效；因此，其使用量迅速增加，这可能对环境和生物构成潜在危害。然而，关于水中 CQP 的去除方法的研究结果有限。在此，制备了铁和镁共改性油菜秸秆生物炭（Fe/Mg-RSB）以去除水溶液中的 CQP。结果表明，Fe 和 Mg 的共改性提高了油菜秸秆生物炭（RSB）对 CQP 的吸附效率，最大吸附容量为 42.93mg/g（在 308K 时），约是 RSB 的两倍。吸附动力学和等温线分析以及物理化学特性分析表明，CQP 吸附到 Fe/Mg-RSB 上是由于孔填充、π-π相互作用、氢键、表面络合和静电相互作用的协同作用所致。此外，尽管溶液 pH 值和离子强度会影响 CQP 的吸附性能，但 Fe/Mg-RSB 对 CQP 仍具有高吸附能力。柱吸附实验表明，Yoon-Nelson 模型更好地描述了 Fe/Mg-RSB 的动态吸附行为。此外，Fe/Mg-RSB 具有重复使用的潜力。因此，铁和镁共改性生物炭可用于受污染水中 CQP 的修复。
