Fabrication and Characterization of Zinc Oxide Nanoparticles for the Preconcentration of Lead(II) in Milk and Water with Detection by Flame Atomic Absorption Spectrometry. (3rd March 2016)

• Record Type: Journal Article
• Authors: Panahi, Homayon Ahmad; Khalaj, Sodabeh; Nasrollahi, Sara; Moniri, Elham
• Is Part Of: Analytical letters. Volume 49:Number 4(2016)
• Page Start: 488
• Page End: 498
• Publication Date: 2016-03-03
• Subjects: Lead -- nanosorbent -- preconcentration -- solid phase extraction -- zinc oxide nanoparticles; Chemistry, Analytic -- Periodicals; Chemistry, Analytic -- Abstracts; 543
• DOI: 10.1080/00032719.2015.1076828
• Languages: English
• ISSNs: 0003-2719

Abstract

ABSTRACT: A method is reported for the immobilization of iminodiacetic acid on zinc oxide nanoparticles modified by N-[2-aminoethyl]-3 aminopropyltrimethoxysilane. The nanosorbent was characterized by infrared spectroscopy, elemental analysis, thermogravimetric analysis, and scanning electron microscopy. The preconcentration and determination of trace Pb(II) were characterized in environmental water and milk. The optimum pH for sorption of the metal was 7. The sorption capacity of sorbent was 51 mg g −1 . A high recovery of Pb(II) ions was obtained from 81 to 100% with 0.5 M nitric acid as the elution solvent. The reported nanosorbent provided high accessibility of active chelating sites in the modified zinc oxide nanoparticles. The equilibrium adsorption of Pb(II) by this sorbent were characterized by Langmuir, Freundlich, Temkin, and Redlich-Peterson models.