Preparation of Modified Magnetic Cobalt Nanoparticles as a New Magnetic Sorbent for the Preconcentration and Determination of Trace Amounts of Lead Ions in Environmental Water and Soil (Air-Dust) Samples

In this study, cobalt magnetic nanoparticles (MNPs) were synthesized and then modified by sodium dodecyl sulfate (SDS) and 2-(5-bromo-2-pyridylazo)-5-diethyl aminophenol ligand (5-Br-PADAP), through a chemical precipitation method. Characterization of the prepared MNP adsorbents was performed by Fou...

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Bibliographic Details
Published in:Communications in Soil Science and Plant Analysis 2018-03, Vol.49 (6), p.645-657
Main Authors: Roushani, Mahmoud, Baghelani, Yar Mohammad, Mavaei, Maryamosadat, Abbasi, Shahryar, Mohammadi, Sayed Zia
Format: Article
Language:English
Subjects:
Absorption spectroscopy
Aminophenol
Atmospheric particulates
Atomic absorption analysis
Atomic absorption spectroscopy
Chemical precipitation
Cobalt
Cobalt nanoparticles
Desorption
Detection
Dust storms
Electron microscopy
flame atomic absorption spectrometry
Fourier transforms
Ion concentration
Ions
Lead
lead determination
Nanoparticles
preconcentration
Sodium
Sodium dodecyl sulfate
Sodium lauryl sulfate
Soil
Soil water
Spectral analysis
Spectrometry
Transmission electron microscopy
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Summary:In this study, cobalt magnetic nanoparticles (MNPs) were synthesized and then modified by sodium dodecyl sulfate (SDS) and 2-(5-bromo-2-pyridylazo)-5-diethyl aminophenol ligand (5-Br-PADAP), through a chemical precipitation method. Characterization of the prepared MNP adsorbents was performed by Fourier transform infrared and transmission electron microscopy. Cobalt nanoparticles (NPs) surface modified with SDS and 5-Br-PADAP was evaluated as a nanoparticulate solid-phase extraction (SPE) absorbent for lead ions Pb(II) from water and standard samples, prior to its flame atomic absorption spectrometry determination. Effects of pH, amount of sorbent, desorption solvent, adsorption time, desorption time, and interfering ion concentration on extraction efficiency were investigated. Under optimal conditions, the calibration curve was linear in the range of 1.0-500 ng mL −1 of Pb(II) with R 2 = 0.998. Detection limit was 1.6 ng mL −1 in the original solution (3S b /m), and the relative standard deviation for replicate determination of 0.5 μg mL −1 Pb(II) was ±2.7%.
ISSN:0010-3624
1532-2416
1532-4133
DOI:10.1080/00103624.2017.1417419