Adibmehr Zahra, Faghihian H
Department of Chemistry, Firoozabad Branch, Islamic Azad University, P.O. Box 74715-117, Firoozabad, Fars Iran.
Naghshejahan Higher Education Institute, Isfahan, Iran.
J Environ Health Sci Eng. 2020 Jan 11;17(2):1213-1225. doi: 10.1007/s40201-019-00439-x. eCollection 2019 Dec.
In this research, a novel magnetic cobalt ion imprinted adsorbent (Co(II)-MIIP) was synthesized by use of magnetic SBA-15 core-shell. It was functionalized by dithizone, and after identification by various techniques was used for removal of cobalt from aquatic systems. The uptake of cobalt proceeded very fast and achieved to equilibration within 5 min at which 74 mg g of cobalt was adsorbed at pH = 8 with adsorbent dose of 0.15 g. The ion imprinted sorbent exhibited good selectivity towards cobalt ions. Separation and recovery of the used sorbent was carried out respectively by use of magnetic field and by use of HNO (0.1 M), and 85% of the initial capacity was obtained after seven 7 regeneration cycles. Different isotherm models, and error analysis were used to evaluate the experimental data. Thermodynamic, and kinetic evaluations showed that sorption process was endothermic, and described by second order kinetic model (R > 0.99). The equilibrium was established within five min.
在本研究中，利用磁性SBA - 15核壳合成了一种新型磁性钴离子印迹吸附剂（Co(II)-MIIP）。它用双硫腙进行功能化，经各种技术鉴定后用于从水体系中去除钴。钴的吸附过程进行得非常快，在5分钟内达到平衡，此时在pH = 8、吸附剂剂量为0.15 g的条件下，每克吸附剂吸附74 mg钴。离子印迹吸附剂对钴离子表现出良好的选择性。分别利用磁场和0.1 M的HNO对用过的吸附剂进行分离和再生，经过7次再生循环后获得了初始容量的85%。使用不同的等温线模型和误差分析来评估实验数据。热力学和动力学评估表明，吸附过程是吸热的，并且由二级动力学模型描述（R > 0.99）。在5分钟内建立了平衡。
