title: Takovite-aluminosilicate@MnFe2O4 nanocomposite, a novel magnetic adsorbent for efficient preconcentration of lead ions in food samples.
abstract: Here in we report preparation of MnFe2O4 and magnetic takovite-aluminosilicate adsorbent via precipitation methodology. The synthesized nanocomposite was applied in preconcentration of Pb(2+) ions from various matrices. The structural, surface, and magnetic characteristics of the adsorbent were investigated by XRD, EDX, FE-SEM, and VSM techniques. Several parameters affecting preconcentration efficiency, including sample pH, contact time, adsorbent amount, and sample volume were studied and optimized. Under optimized conditions, the calibration graph was linear in the range of 2.0-100μgL(-1), the relative standard deviation was 3.00% (n=5), the limit of detection was 0.67μgL(-1), and the enrichment factor was 70.0. The maximum adsorption capacity of the adsorbent was calculated to be 69.9mgg(-1). The suggested method was successfully applied in determination of trace amount of Pb(2+) ions in water and food samples.
authors.affiliation: School of Chemistry, University College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran.
authors.forename: Zahra Shakeri
authors.initials: ZS
authors.lastname: Kardar
authors.affiliation: School of Chemistry, University College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran.
authors.forename: Mostafa Hossein
authors.initials: MH
authors.lastname: Beyki
authors.affiliation: School of Chemistry, University College of Science, University of Tehran, P.O. Box 14155-6455, Tehran, Iran. Electronic address: Shemiran@khayam.ut.ac.ir.
authors.forename: Farzaneh
authors.initials: F
authors.lastname: Shemirani
mesh_terms: D000327:Adsorption; D000538:Aluminum Silicates / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D005506:Food Contamination / Q000032:analysis* / Q000517:prevention & control; D007854:Lead / Q000302:isolation & purification*; D008280:Magnetics; D017895:Manganese Compounds / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D000538:Aluminum Silicates; D005290:Ferric Compounds; D017895:Manganese Compounds; D014874:Water Pollutants, Chemical; C551151:manganese ferrite; D014867:Water; C049037:aluminosilicate; D007854:Lead
keywords: Ferrite; Food sample; Magnetic nanocomposite; Takovite