Synthesis of Iron Nanoparticles and Applications in the Removal of Heavy Metals from Aqueous Solutions

Abstract

In this study, The synthesis of nano-size iron particles using a borohydride reduction of ferrous/ ferric ions in the presence ofsolvent containing ethanol, was investigated. The particle distribution of each sample of synthesized iron particles was characterized by powder X-raydiffraction XRD, which was used to determinethe prevailing phases.. Nanoscale iron particles have large surface areas and high surface reactivity. The size of the particles have been diagnosed by AFM, SEM, TEM microscopy.Then being used to remove elements (Cd ,Ni ,Cr ) from water. At the adsorption process the element were determined by the percentage of adsorption in conjunction with atomic absorption spectroscopy ,also byEDX. The synthesized nano-ZVI material has shown aremarkable potential for heavy metals immobilization from aqueous water. Langmuir adsorption parameters for the adsorption of Cd, Cr, Ni were (k 0.85 , 0.71 , 0.67) .ΔH=11.6 , 22.8 , 16.6kJper mole.G=-12.6 , -15.5 , -12.9kJ per mole,ΔS=0.08 , 0.13 , 0.098kJ per mole respectively.

Keywords : Nanoparticles , Iron oxide , TEM , EDX , Heavy Metals, Adsorption