Removal of thorium from aqueous solution by adsorption using PAMAM dendron-functionalized styrene divinyl benzene

被引：34
|
作者：
Ilaiyaraja, P. [1 ]
Deb, Ashish Kumar Singha [1 ]
Sivasubramanian, K. [1 ]
Ponraju, D. [2 ]
Venkatraman, B. [1 ]
机构：
[1] Indira Gandhi Ctr Atom Res, Radiol Safety Div, Radiol Safety & Environm Grp, Kalpakkam 603102, Tamil Nadu, India
[2] Indira Gandhi Ctr Atom Res, Reactor Design Grp, Safety Engn Div, Kalpakkam 603102, Tamil Nadu, India
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2013年 / 297卷 / 01期
关键词：
Thorium; PAMAM dendron; Functionalized styrene divinylbenzene; Adsorption isotherm models; Kinetics; Thermodynamics; SOLID-PHASE EXTRACTION; AMBERLITE XAD-4; SELECTIVE EXTRACTION; SORPTION BEHAVIOR; IONIC-STRENGTH; PRECONCENTRATION; TH(IV); U(VI); SEPARATION; URANIUM(VI);
D O I：
10.1007/s10967-012-2402-x
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Third generation poly(amido)amine (PAMAM) dendron was grown on the surface of styrene divinylbenzene (SDB) by divergent polymerization method. This new chelating resin (PAMAMG3-SDB) has been investigated in liquid-solid extraction of thorium. The effects of analytical parameters such as pH, contact time, concentration of thorium, resin dose and temperature on adsorption were investigated. Kinetic and isotherm studies of the adsorption were also carried out to understand the nature of adsorption of thorium on the chelating resin. Kinetic data followed a pseudo-second-order model and equilibrium data were best fitted with Langmuir model. The maximum adsorption capacity of thorium ions was determined to be 36.2 mg g(-1) at 298 K. Thermodynamic parameters such as standard enthalpy, entropy, and free energy of adsorption of thorium on PAMAMG(3)-SDB were calculated as -10.498 kJ mol(-1), 0.0493 kJ mol(-1) K-1 and -25.208 kJ mol(-1) respectively at 298 K from temperature dependent equilibrium data.
引用
收藏
页码：59 / 69
页数：11
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