شماره ركورد كنفرانس :
4518
عنوان مقاله :
Kinetic and equilibrium studies on the adsorption of Pb(II) onto functionalized poly(vinyl alcohol)/silica composite membrane with mercapto groups
Author/Authors :
Mohammad Irani Department of Chemical Engineering- Faculty of Engineering- University of Tehran , Mohammad Ali Mousavian Department of Chemical Engineering- Faculty of Engineering- University of Tehran , Ali Reza Keshtkar Nuclear Fuel Cycle School- Nuclear Science and Technology Research Institute, Tehran
كليدواژه :
Poly(vinyl alcohol)/silica composite membrane , Sol-gel , Functional groups , Kinetic , Isotherm
عنوان كنفرانس :
The 7th International Chemical Engineering Congress & Exhibition (IChEC 2011
چكيده لاتين :
In this paper, poly(vinyl alcohol)/silica composite membrane modified with mercapto groups and its
application for adsorption of Pb(II) from aqueous solution in a batch system is investigated. The effect
of pH, contact time and initial concentration on adsorption of Pb(II) ions were examined. The kinetic
data were analyzed by pseudo-first-order, pseudo-second-order and double- exponential kinetic
models. From result obtained; the pseudo-second-order kinetic model best described the adsorption of
lead ions. Three two-parameter isotherm models namely Freundlich, Langmuir and Dubinin –
Radushkevich were applied to describe the equilibrium data. Based on results, the experimental data
followed well Freundlich model.
