Record Details


Field	Value

Title	Separation of Zn(II) by sorption onto powdered marble wastes

Creator	Ghazy, S E Gad, A H M

Subject	Zinc(II) sorption Langmuir Dubinin-Radushkevich isotherm Marble waste Natural water

Description	433-442 Batch adsorption experiments were carried out to remove Zn(II) ions from aqueous solutions and water samples using powdered marble wastes (PMW) as an effective sorbent which is inexpensive, widespread, and considered as an environmental problem. The parameters such as solution pH, sorbent and Zn(II) concentrations, stirring times, foreign ions and temperature were investigated. The sorption of Zn(II) ions onto (PMW) is described by Langmuir model. Dubinin-Radushkevich (D-R) isotherm model was also applied to describe the nature of the adsorption of the metal. Thermodynamic parameters, viz. the Gibbs free energy change (ΔGº), enthalpy (ΔHº) and entropy (ΔSº) were also calculated. These parameters indicated that the adsorption process of Zn(II) ions on PMW was spontaneous and endothermic in nature. Under the optimum experimental conditions employed, the removal of ~100% of Zn(II) ions was attained. The procedure was successfully applied to remove Zn(II) ions from aqueous and different natural water samples. The adsorption mechanism is also suggested.

Date	2009-01-22T07:23:54Z 2009-01-22T07:23:54Z 2008-09

Type	Article

Identifier	0971–457X http://hdl.handle.net/123456789/2847

Language	en_US

Publisher	CSIR

Source	IJCT Vol.15(5) [September 2008]

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