三组分复合材料对镍离子(Ⅱ)的吸附研究

Study on the adsorption of Ni^(2+) on three-component composite

通过配位聚合的方式制备了一种新型的三组分复合材料(SC-GO-PANI),通过扫描电镜(SEM)等技术手段对结构进行了表征,并研究了吸附Ni^(2+)离子的性能。同时,系统考察了吸附剂用量、pH、初始浓度和共存阴离子对吸附性能的影响。结果表明:该材料具有交联的网状空间结构和相对较大的比表面积。在298K下,吸附去除率最高可达96.71%,达到国标饮用水标准。此外,对Ni^(2+)离子的吸附符合准二级动力学模型,属于单分子化学吸附,吸附等温线可用Freundlich方程描述。

A new three-component composite material(SC-GO-PANI) was prepared by coordination polymerization.The structure was characterized by scanning electron microscopy(SEM) and other technical methods,and studied the adsorption performance for Ni^(2+) ions.At the same time,the influence of the amount of adsorbent,pH,initial concentration and coexisting anions on the adsorption performance was examined.The results shown that the material had cross-linked network space structure and relatively large specific surface area.At 298 K,the adsorption removal rate can reach up to 96.71%,reaching the national standard for drinking water.In addition,the adsorption of Ni^(2+) ions conformed to the quasi-second-order kinetic model and belonged to single-molecule chemical adsorption.The adsorption isotherm can be described by Freundlich equation.