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Abstract
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Many technologies such as ion exchange, reduction flocculation, membrane filtration, precipitation, filtration and reverse osmosis have been proposed by different scientific works for the removal of heavy metal from aqueous solution and effluents. However most of these technologies require high operation cost and also generate toxic sludge [1]. Magnetite with chemical formula Fe3O4, is one of the most important magnetic compounds that is widely used in industry [2] and wastewater treatment [3]. In last two decays using of magnetite nanoparticles increased because of their strong superparamagnetic properties, good biocompatibility and low toxicity. One of important usage of Fe3O4, is in drug industrial such as targeted drug delivery, hyperthermia treatment, cell separation, magnetic resonance imaging, immunoassays and the separation of biochemical products [4] and also removal of heavy metals and dyes. In past studies synthesis of nano particle of magnetite has some problem like require high temperature, expensive reactant, long time period to obtain final product. This disadvantages encourage us to design new method that solve this problems. In our research we used a facile electrochemical method without any reagent except NaOH. The synthesized nanoparticles were characterized by with XRD spectra, SEM and IR. It was also found that, the average size of the synthesized nanoparticles are 50 nm. In addition, these nanoparticles were tested for the removal of heavy metals such as nickel and chromium and dyes such as malachite green. The results of UV spectra confirmed successful removal of these compounds (about 95%).
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