Microwave assisted preconcentration of trace elements with pyridoxine functionalized Amberlite XAD-4

Department of Chemistry, Damghan Branch, Islamic Azad University, P.O. Box 36716-39998,

Damghan, Iran

E-mail : h.hashemimoghadam@damghaniau.ac.ir Fax : 98-23-35225044

Manuscript received online 13 June 2013, revised 21 May 2014, accepted 20 June 2014

Pyridoxine modified Amberlite XAD-4 has been synthesized by coupling it through an azo spacer. The resulting chelating resin, characterized by elemental analysis, thermogravimetric analysis (TGA) and infrared (IR) spectra, was used to preconcentrate Cd, Pb, Fe, Co, Cu and Zn ions. Parameters, such as sorption capacity of the chelating resin, pH and eluent, were evaluated. The effects of electrolytes and cations on the preconcentration were also investigated. Furthermore, effect of microwave power was investigated on adsorption rate of these heavy metals. The obtained results show, time of extraction is reduced significantly by this modification. The procedure was validated by standard addition and comparison of obtained result by GFAAS method. The developed method was utilized for preconcentration and determination of Cd, Pb, Fe, Co, Cu and Zn in wastewater and preconcentration of Pb in lipstick by inductively coupled plasma-atomic emission spectrometry (ICP OES) with satisfactory results.