Selective solid-phase extraction using 1,5-diphenylcarbazide-modified magnetic nanoparticles for speciation of Cr(VI) and Cr(III) in aqueous solutions

In the present work, selective magnetic solid-phase extraction speciation of Cr(VI) and Cr(III) from aqueous solution with synthesized magnetic nanoparticles modified with 1,5-diphenylcarbazide (DPC). Cr(VI) could be separated from Cr(III) due to its complexation with 1,5-diphenylcarbazide. Fe 3 O 4...

Full description

Saved in:
Bibliographic Details
Published in:International journal of environmental science and technology (Tehran) 2019-08, Vol.16 (8), p.4739-4748
Main Authors: Assi, N., Aberoomand Azar, P., Saber Tehrani, M., Husain, S. W., Darwish, M., Pourmand, S.
Format: Article
Language:English
Subjects:
Aquatic Pollution
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Science and Engineering
Original Paper
Soil Science & Conservation
Waste Water Technology
Water Management
Water Pollution Control
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In the present work, selective magnetic solid-phase extraction speciation of Cr(VI) and Cr(III) from aqueous solution with synthesized magnetic nanoparticles modified with 1,5-diphenylcarbazide (DPC). Cr(VI) could be separated from Cr(III) due to its complexation with 1,5-diphenylcarbazide. Fe 3 O 4 @SiO 2 @DPC with an average size of 22 nm has been characterized by X-ray diffraction, field emission scanning electron microscopy, and Fourier transform infrared spectroscopy. The optimized conditions for adsorption were established by adjusting the parameters affecting speciation of Cr(VI) and Cr(III), such as pH, sample volume, metal ion concentration, adsorbent dosage, and time. The modified magnetic nanoparticles preferably adsorbed Cr(VI) at pH = 2.5 and made it possible to speciate it from Cr(III). Four times recovery of magnetic solid phase was investigated by eluting Fe 3 O 4 @SiO 2 @DPC with different concentrations of HCl, HNO 3 and H 2 SO 4 and it was found that 10 mL of 1 M HNO 3 was the best eluent. The obtained data fitted with Langmuir isotherm of adsorption which indicates that the adsorption of Cr(VI) onto Fe 3 O 4 @SiO 2 @DPC is a type of monolayer sorption. Finally, magnetic nanoparticles were evaluated for chromium electroplating wastewater where it showed a sufficient ability to work in a real media.
ISSN:1735-1472
1735-2630
DOI:10.1007/s13762-018-1868-7