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ARPN Journal of Science and Technology >> Volume 7, Issue 1, January 2017

ARPN Journal of Science and Technology


Green Synthesis of Nano-V–biotite for Removal of Toxic Heavy Metals, Th (IV) and U (VI) from Aqueous Solutions

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Author Khaled M. Elsabawy, Morsy M.A.Sekkina, Ahmed T.Tawfik
ISSN 2225-7217
On Pages 686-696
Volume No. 2
Issue No. 8
Issue Date October 01, 2012
Publishing Date October 01, 2012
Keywords Biotite, heavy metals, uranium, thorium, removal, free-fluoride, Green synthesis.



Abstract

Development of reliable and eco-friendly processes for synthesis of metallic nanoparticles is an important step in the field of application of nanotechnology. In this study, we report the synthesis of new free fluoride V-biotite having the optimized formula NaV2.5(Al,Si)4O10 (OH)2 for the removal of several toxic metals in aqueous system. The synthetic clay was first characterized by different techniques including X-ray diffraction (XRD), infrared absorption spectra (IR), electron spin resonance (ESR), thermal analysis (TG/TDA), scanning electron microscopy (SEM) and DC- electrical conductivity was measured as a function of absolute temperature. Then, the possible use of studied clay as adsorbent for removal of Ag (I), Hg(II), As(V), Cr(III), and Pb(II) from aqueous solutions was evaluated. The removal efficiency varied between 40% and 98%. The same clay was applied to removal of Th (IV) and U(VI) showing higher results than the relevant previous studies. The results suggest that the studied biotite can be effectively used for the treatment of contaminated wastewater.


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