Zhang Yalei, Shen Zhe, Dai Chaomeng, Zhou Xuefei
State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, 1239 Siping Rd, Shanghai, 200092, China.
Environ Sci Pollut Res Int. 2014 Nov;21(22):12780-9. doi: 10.1007/s11356-014-3212-1. Epub 2014 Jun 28.
A novel-modified magnetic chitosan adsorbent was used to remove selected pharmaceuticals, i.e., diclofenac (DCF) and clofibric acid (CA) and carbamazepine (CBZ), from aqueous solutions. The characterization of magnetic chitosan was achieved by scanning electron and transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, vibrating sample magnetometer, and nitrogen sorption analysis. The magnetic chitosan had effective sorption affinity for DCF and CA but no sorption of CBZ was observed. The sorption capacities of CA and DCF in the individual solutions were 191.2 and 57.5 mg/g, respectively. While in mixed solution, DCF showed higher sorption affinity. Sorption kinetics indicated a quick equilibrium reached within 2 min. Lower solution pH values were found to be advantageous for the adsorption process. The sorption efficacy of CA declined significantly with increasing inorganic salt concentration. However, sorption performance of DCF was stable under different ionic strength conditions.
一种新型改性磁性壳聚糖吸附剂被用于从水溶液中去除选定的药物，即双氯芬酸（DCF）、氯贝酸（CA）和卡马西平（CBZ）。通过扫描电子显微镜、透射电子显微镜、X射线衍射、X射线光电子能谱、振动样品磁强计和氮吸附分析对磁性壳聚糖进行了表征。磁性壳聚糖对DCF和CA具有有效的吸附亲和力，但未观察到对CBZ的吸附。CA和DCF在单独溶液中的吸附容量分别为191.2和57.5 mg/g。而在混合溶液中，DCF表现出更高的吸附亲和力。吸附动力学表明在2分钟内迅速达到平衡。发现较低的溶液pH值有利于吸附过程。CA的吸附效率随着无机盐浓度的增加而显著下降。然而，DCF在不同离子强度条件下的吸附性能稳定。
