Wang Jing, Zhang Yong, Liu Fubin, Liu Ying, Wang Litao, Gao Guihua
School of Pharmacy, Shandong University of Traditional Chinese Medicine, No. 4655, University Road, University Science Park, Changqing District, Jinan 250355, Shandong Province, P. R. China.
School of Pharmacy, Jining Medical College, No. 669, Xueyuan Road, Donggang District, Rizhao 276826, Shandong Province, P. R. China.
ACS Omega. 2023 Aug 24;8(35):32017-32026. doi: 10.1021/acsomega.3c03897. eCollection 2023 Sep 5.
A multifunctional cylindrical hybrid foam column, referred to as the chitosan/cyclodextrin/MIL-68(Al) (CS/CD/MIL-68(Al)) foam column, was prepared for the first time. The prepared foam column could be used for the adsorption/removal of hydrophilic and hydrophobic contaminants by different forms. Here, it was placed in hydrophilic dye solutions to investigate the adsorption behavior of methylene blue and trypan blue. The adsorption process followed the pseudo-second-order kinetic model with ranging from 0.9983 to 0.9998 for methylene blue and from 0.9993 to 1.0000 for trypan blue, and the adsorption process was consistent with the Langmuir isothermal model with greater than 0.96. The RL values for methylene blue and trypan blue were 0.8871 and 0.5366, respectively, which were present between 0 and 1, indicating that the adsorption behaviors of the two dyes onto the CS/CD/MIL-68(Al) foam column were favorable. The maximum adsorption capacities () of methylene blue and trypan blue were 60.61 and 454.55 mg/g at 298 K, respectively. Also, the CS/CD/MIL-68(Al) foam column was spun into a syringe and used to adsorb trace hydrophobic sulfonamides from water in the form of filtration. The porous structure impeded the need for any external force and equipment, allowing the water sample to pass through the foam column smoothly. The conditions of the CS/CD/MIL-68(Al) foam column were optimized. The adsorption was carried out under the condition of pH = 4, the amount of the adsorbent was two foam columns, and no salt was added. It was found that the removal rate of the CS/CD/MIL-68(Al) foam column for six sulfonamides was 100%, and it could be reused at least five times. Therefore, this CS/CD/MIL-68(Al) foam column had a simple preparation method, offered a flexible and diverse form of use, was nonpolluting, biodegradable, and reusable, and could have a wider application in the field of environmental pollutant removal and adsorption.
首次制备了一种多功能圆柱形混合泡沫柱，称为壳聚糖/环糊精/MIL-68(Al)（CS/CD/MIL-68(Al)）泡沫柱。制备的泡沫柱可通过不同形式用于吸附/去除亲水性和疏水性污染物。在此，将其置于亲水性染料溶液中以研究亚甲基蓝和台盼蓝的吸附行为。吸附过程遵循准二级动力学模型，亚甲基蓝的相关系数在0.9983至0.9998之间，台盼蓝的相关系数在0.9993至1.0000之间，且吸附过程符合Langmuir等温模型，相关系数大于0.96。亚甲基蓝和台盼蓝的RL值分别为0.8871和0.5366，均介于0和1之间，表明两种染料在CS/CD/MIL-68(Al)泡沫柱上的吸附行为良好。在298 K时，亚甲基蓝和台盼蓝的最大吸附容量分别为60.61和454.55 mg/g。此外，将CS/CD/MIL-68(Al)泡沫柱装入注射器，以过滤形式用于吸附水中痕量疏水性磺胺类药物。多孔结构无需任何外力和设备，使水样能顺利通过泡沫柱。对CS/CD/MIL-68(Al)泡沫柱的条件进行了优化。吸附在pH = 4的条件下进行，吸附剂用量为两根泡沫柱，且不添加盐。发现CS/CD/MIL-68(Al)泡沫柱对六种磺胺类药物的去除率为100%，且可重复使用至少五次。因此，这种CS/CD/MIL-68(Al)泡沫柱制备方法简单，使用形式灵活多样，无污染、可生物降解且可重复使用，在环境污染物去除和吸附领域可能有更广泛的应用。
