Toxic cadmium selective sequestration from food samples using melamine anchored magnetic cellulose by surface imprinting route

Cadmium is very toxic for living organisms hence selective and efficient control capturing of it is necessary. To reach this goal a novel imprinted polymer was developed using melamine anchored MnFe2O4 - cellulose. Magnetic cellulose was synthesized through an ultrasound-assisted precipitation route. Chloropropyltriethox-ysilane was used to attach melamine to the magnetic cellulose surface. Response surface methodology employed to optimize effective parameters on cadmium adsorption. Time of 13 min, the dosage of 18 mg and pH of 8 was selected as optimum conditions. The relative standard deviation, detection limits and adsorption capacity were 2,5%, 0.50 mu gL-1 and 138 mg g-1 respectively. The selectivity coefficient of Cd(II) relative to Cu(II), Co(II), Ni(II) and Pb(II) were 4, 5, 12 and 3, respectively. Regeneration of the sorbent was performed using HCl (0.5 mol L-1) as eluent. The method was used for cadmium preconcentration in fish, lettuce and liver with satisfactory results.

Automated summary

In this study, a novel imprinted polymer was developed for selective and efficient capture of toxic cadmium. By optimizing the conditions, the best adsorption performance was obtained. The method successfully preconcentrated cadmium in fish, lettuce, and liver.