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Abstract
Magnetic peptide resins (MPRs) are insoluble solid materials with three-dimensional network bearing amino acid moiety coated on magnetic ions as Fe3O4 for increasing surface area, and have fast, easy separation that can be collected by magnetic control. It has become an important technique for the preconcentration and purification of trace metal ions from various geological and water systems. MPR is functionalized with glycine, histidine, and glutamine amino acid moiety (MGLY, MHIS, and MGLU, respectively) on magnetic polyacryl-1,3,4-thiadiazol-2(3H)-thion (MTDT) crosslinked by 10% divinyl benzene. This resin is prepared by azide and then to peptide by reaction with amino acids. This article focuses on adsorption studies of some heavy metals such as Cu(II), Fe(III), Zn(II), U(VI), Pb(II), Th(IV), Ni(II), Cd(II), and Co(II) from an aqueous solution before application on natural samples such as contaminated underground water and floodwater. Langmuir and Freundlich isotherm models were applied to analyze the experimental data, and the best interpretation for the experimental data was given by the Langmuir isotherm equation, which gives a capacity slightly higher than the experimental one. Effects of pH, temperature, and initial metal ions concentrations on the adsorption behavior were investigated.