Extraction and preconcentration of Ni(ii), Pb(ii), and Cd(ii) ions using a nanocomposite of the type Fe3O4@SiO2@polypyrrole-polyaniline

Ali Akbar Asgharinezhad; Mohsen Esmaeilpour; Asal Yousefi Siavoshani

doi:10.1039/d2ra03077b

Extraction and preconcentration of Ni(ii), Pb(ii), and Cd(ii) ions using a nanocomposite of the type Fe₃O₄@SiO₂@polypyrrole-polyaniline

RSC Adv. 2022 Jun 30;12(30):19108-19114. doi: 10.1039/d2ra03077b. eCollection 2022 Jun 29.

Authors

Ali Akbar Asgharinezhad¹, Mohsen Esmaeilpour¹, Asal Yousefi Siavoshani²

Affiliations

¹ Chemistry and Process Research Department, Niroo Research Institute (NRI) Tehran Iran aasgharinezhad@nri.ac.ir +98 21 88078296 +98 21 88079400.
² School of Polymer Science and Polymer Engineering, The University of Akron Akron OH USA.

Abstract

In this study, the application of Fe₃O₄@SiO₂@polypyrrole-polyaniline magnetic nanocomposite was studied for Ni(ii), Cd(ii), and Pb(ii) ions preconcentration extraction. In this regard, the silica layer prevents the Fe₃O₄ nanoparticles (NPs) from aggregating over a broad pH range value and simultaneously improves chemical stability and hydrophilicity. By using a Box-Behnken design, the effect of various parameters affecting the preconcentration was studied. FAAS was employed to quantify the eluted analytes. The detection limits are 0.09, 1.1, and 0.3 ng mL^-1 for Ni(ii), Cd(ii) and Pb(ii), ions, respectively. The relative standard deviations (RSDs%) were calculated for determining the method's precision, lower than 7.5%. The capacities of sorption are 75, 84, and 98 mg g^-1, respectively. With the usage of a certified reference material, the developed method was validated. After that, the validated method was employed to rapidly extract trace target ions from food samples and gave satisfactory results.