:: Volume 3, Issue 4 ( Autumn, 2016) ::
Environ. health eng. manag. 2016, 3(4): 183-189 Back to browse issues page
Synthesis of 2,4-dinitrophenylhydrazine loaded sodium dodecyl sulfate-coated magnetite nanoparticles for adsorption of Hg(II) ions from an aqueous solution
Soheil Sobhanardakani , Raziyeh Zandipak, Lobat Taghavi
Department of the Environment, College of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran , s_sobhan@iauh.ac.ir
Abstract:   (6722 Views)

Background: The rapid increase in agricultural and industrial development has made heavy metal pollution a serious environmental problem and public health threat; therefore, removal of heavy metals from water is important. The current study prepared DNPH@SDS@Fe3O4 nanoparticles as a novel and effective adsorbent for removal of Hg(II) ions from an aqueous solution.
Methods: A selective adsorbent for Hg(II) was synthesized by coating Fe3O4 nanoparticles with sodium dodecyl sulfate which was further functionalized with 2,4-dinitrophenylhydrazine (2,4-DNPH). The synthesized nanoparticles were characterized by Fourier transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), scanning electron microscopy (SEM) and SEM–EDXSt. The effects of pH, dose of adsorbent and shaking time on adsorption capacity were investigated. The kinetics and equilibrium of adsorption of the metal ions were thoroughly studied.
Results: SEM showed that the size of the nanoparticles was 20 to 35 nm. The maximum adsorption capacity for Hg(II) was 164.0 mg g-1 for an adsorbent dose of 0.04 g at pH 7.0, 25°C and the initial metal concentration was 25 mg L-1,which was greater than for most adsorbents previously examined for Hg(II) adsorption. Adsorption experimental data showed good correlation with the pseudo-second-order model and Langmuir isotherm model.
Conclusion: The results indicated that the DNPH@SDS@Fe3O4 nanoparticles are an efficient adsorbent for removal of heavy metal from wastewater.

Keywords: Adsorption, Mercury, Magnetite nanoparticles, Wastewater, Kinetics
eprint link: http://eprints.kmu.ac.ir/id/eprint/26078
Full-Text [PDF 817 kb]   (1431 Downloads)    
Type of Study: Research | Subject: Special
Received: 2017/02/1 | Accepted: 2017/02/1 | Published: 2017/02/1

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Volume 3, Issue 4 ( Autumn, 2016) Back to browse issues page