Cumhuriyet University, Faculty of Pharmacy, Department of Analytical Chemistry, Sivas, Turkey.
Cumhuriyet University, Faculty of Sciences, Department of Chemistry, Sivas, Turkey.
J Hazard Mater. 2013 Jun 15;254-255:397-405. doi: 10.1016/j.jhazmat.2013.04.004. Epub 2013 Apr 11.
A new material containing gallocyanine (GC) grafted polyacyril amide (PAA) was synthesized and its adsorption ability was examined for the removal of uranyl ions from aqueous media. The new developed adsorbent was characterized by FTIR, SEM, and PZC analysis. Adsorption of UO₂(2+) ions from aqueous solution as a function of ion concentration, pH, ionic strength, temperature, and reusability of adsorbent was investigated in detail. The adsorption data were analyzed by using the Langmuir, Freundlich and Dubinin-Radushkevich (DR) models. The adsorption of UO₂(2+) increased with pH and reached a plateau value in the pH range 5-6. The adsorption of UO₂(2+) ions were not affected by increasing ionic strength. The adsorption mechanism followed an endothermic and spontaneous process with increased disorderliness at adsorbate/adsorbent interface. The adsorption process followed a pseudo-second-order kinetics. The new developed material is a potential adsorbent for effective removal of uranyl ions from aquatic solutions.
一种新型材料，含有接枝聚丙烯酰胺的呫吨菁（GC），被合成出来，并检测了其从水介质中去除铀酰离子的吸附能力。通过傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和等电点（PZC）分析对新开发的吸附剂进行了表征。详细研究了UO₂(2+)离子在水溶液中作为离子浓度、pH 值、离子强度、温度和吸附剂可重复使用性的函数的吸附。使用朗缪尔、弗伦德利希和杜宾-拉什科夫斯基（DR）模型分析了吸附数据。UO₂(2+)的吸附随着 pH 值的增加而增加，并在 pH 值范围 5-6 时达到了一个平台值。UO₂(2+)离子的吸附不受离子强度增加的影响。吸附机制遵循吸热和自发过程，吸附剂/吸附质界面的无序度增加。吸附过程遵循伪二级动力学。这种新型材料是一种从水溶液中有效去除铀酰离子的潜在吸附剂。
