Synthesis of novel nanocomposite TiO2/ Fe2O3 /Al2O3 by sol-gel method and its application on PVDF membrane for removal of Cr (VI) from water

Poly(vinylidene fluoride)(PVDF) membranes have been extensively applied to scientific research and industrial process due to its outstanding properties such as high thermal stability, good chemical resistance and membrane forming properties, in which these properties make it suitable for wastewater treatment. By possessing low level of extractable, PVDF can be considered as a pure polymer; which makes it a suitable candidate in biomedical and bio-separation applications [1]. Nanoscale particles have been widely studied in environmental separations and catalytic reactions due to their unique physical and chemical properties. Titanium oxide nanoparticles have extensively applied in industry and in different photo catalyst area for converting the contamination to the composition of the organic materials to be recovered in environment.Chrome which is present in the underground and surface water is one of the most toxic element threating humanhealth and animals [2]. Chrome has been removed in different type of ways. In this study removal Chrome fromwater was investigated by PVDF membrane involves TiO2/ Fe2O3 /Al2O3nanocomposites. For prepared PVDF membrane we used polyvinilidenflourid (PVDF) as polymer matrix and TiO2/ Fe2O3 /Al2O3 nanocomposite with loading content of (3% wt.) as reinforcement phase by using phase inversion technique. The influence of the parameters including pH, and chrome concentrations in a mount of adsorption were examined and the adsorption isotherms were analyzed by using Langmuir and Freundlich models. Some techniques such as XRD, Field emission scanning electron microscopy (FE-SEM) ،have been used for studying The morphology of membranes and structural properties of TiO2/ Fe2O3 /Al2O3 nanocomposites, and the remained concentration of chrome in water was measured by AAS device. The results show use PVDF /TiO2/ Fe2O3 /Al2O3membrane is an effective and rapidway to remove Cr (VI)from water.