Author/Authors :
Rastegar، Abdossamad نويسنده Department of Safety and Protection Engineering, Petroleum University of Technology, Abadan, Iran Rastegar, Abdossamad , Anvaripour، Bagher نويسنده Department of Safety and Protection Engineering, Petroleum University of Technology, Abadan, Iran Anvaripour, Bagher , Jaafarzadeh، Nematollah نويسنده Department of Environmental Health Engineering, School of Health, Ahvaz Jondishapour University of Medical Sciences, Ahvaz, Iran ,
Abstract :
In the present study, lightweight expanded clay aggregate (LECA) coated with iron oxide was
investigated as a low cost sorbent to remove Ni from wastewater. Iron oxide coated LECA (IOCL)
as a new sorbent was tested for its efficiency as Ni sorbent using operational parameters such as
contact time, the initial pH of the solutions, and sorbent dosage concentration in batch systems. The
adsorption characteristics of the natural LECA and IOCL were investigated through scanning electron
microscopy (SEM), X-ray fluorescence spectroscopy (XRF), and X-ray diffraction (XRD) analysis.
The maximum sorption efficiency was found to be 96% for IOCL at an initial pH of 6.0 and a sorbent
dosage of 5. 0 g. l
. The results revealed that the Ni sorption kinetic data were well fitted to a
pseudo second–order kinetic model. The experimental data showed that Ni sorption was
considerably high on IOCL and the new sorbent is an economical method for Ni (II) removal from
effluents and aqueous media.
