Removal of uranyl ions in aquatic mediums by using a new material: gallocyanine grafted hydrogel.
Removal of uranyl ions in aquatic mediums by using a new material: gallocyanine grafted hydrogel.
复制标题
DOI：
10.1016/j.jhazmat.2013.04.004
复制
发表时间：
2013-06
影响因子：
13.6
通讯作者：
H. I. Ulusoy;S. Şimşek
中科院分区：
文献类型：
--
作者：
H. I. Ulusoy;S. Şimşek
合成了一种新的聚丙烯酰胺(PAA)接枝二环丙蓝(GC)材料，考察了该材料对水介质中铀酰离子的吸附性能。采用FTIR、SEM、PZC等分析手段对新开发的吸附剂进行了表征。详细研究了离子浓度、pH值、离子强度、温度和吸附剂的重复使用对水溶液中UO22+离子的吸附。用Langmuir、Freundlich和Dubinin-Radushkevich(DR)模型对吸附数据进行了分析。UO_(22+)的吸附随着pH的升高而增加，在pH为5~6的范围内达到平台值。离子强度的增加对UO_(22+)的吸附没有影响。吸附机理遵循吸热自发过程，吸附/吸附质界面无序度增加。吸附过程符合准二级动力学。这种新开发的材料是一种潜在的吸附剂，可以有效地去除水溶液中的铀酰离子。
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 UO22+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 UO22+increased with pH and reached a plateau value in the pH range 5–6. The adsorption of UO22+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.