Pre-concentration of Zn(II) ions from aqueous solutions using meso-porous pyridine-enrobed magnetite nanostructures

Publication date: 15 August 2018
Source:Food Chemistry, Volume 257
Author(s): H. Vojoudi, A. Badiei, A. Amiri, A. Banaei, G.M. Ziarani, K. Schenk-Joß
A simple, cheap and efficient method for pre-concentrating and separating Zn(II) ions from aqueous solutions and real samples has been designed. The method was implemented in a prototype featuring interchangeable chromatography-column-like cartridges, filled with meso-porous silica nanostructures, allowing easy exchange of the type and quantity of the sorbent. The adsorbents inside the column are held in place by means of porous polymer nano-fibre membranes. The effects of various parameters on the adsorption of Zn(II) ions from aqueous solutions were investigated. Maximal adsorption (∼99%) was found for Zn(II) ions amongst a mixture of Cu(II), Co(II), Ni(II), Ag(I), Au(III), Pd(II) and Pb(II) in aqueous solution. The procedure was tested for pre-concentrating and determining traces of zinc in real samples of meat, fish and hen marketed in Tehran. A desorption process using 0.5 mol L⁻¹ HCl as eluent, showed ∼97% recovery of the Zn(II) ions adsorbed on the MSMPP sorbent.

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