Kinetics of Cu2+ binding to the poly(acrylic acid) hydrogel

被引：2

作者：

Kostic, A. ^{[1
]}

Jovanovic, J. ^{[2
]}

Adnadjevic, B. ^{[2
]}

Popovic, A. ^{[3
]}

机构：

[1] Fac Agr, Belgrade, Serbia

[2] Fac Phys Chem, Belgrade, Serbia

[3] Fac Chem, Belgrade, Serbia

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2007年 / 81卷 / 09期

关键词：

D O I：

10.1134/S0036024407090051

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Isothermal kinetics of copper (ion) binding to poly(acrylic acid) (PAA) hydrogel at 20, 25, 35 and 45 C was investigated. Isothermal conversions and kinetic curves of Cu2+ binding to the PAA hydrogel were determined. It was found that the well-known kinetic models of Peppas cannot be applied to describing the entire process of Cu2+ binding. The new method for the determination of the kinetic model of the Cu2+ binding process, as well as the activation energy density distribution functions of PAA hydrogel interaction with Cu2+, were established. It was found that Cu2+ diffusion to the active centers (with E-a = 9 kJ/mol) has a dominant influence on the kinetics of the process at temperatures T >= 30 degrees C, but at T >= 30 degrees C and for the degree of bound Cu2+ alpha >= 0.2, the interaction of Cu2+ from the adsorption center with E-a = 26 kJ/mol is dominant.

引用

页码：1374 / 1379

页数：6

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