Adsorption of Fe metal in groundwater by magnetite-kaolinite

Abstract

The magnetite-kaolin was synthesized via coprecipitation method with variation kaolin-magnetite = 1:1, 2:1, 3:1 and the material used to remove Fe metal in groundwater. The kaolin clay, magnetite, and kaolin-magnetite composite was characterized by X-ray diffraction, Fourier transform infra red, and adsorption efficiency test for Fe metal ion. The results indicated magnetite particle adhering to the surface of kaolin by lewis interaction. The results for adsorption kaolin:magnetite = 1:1, 2:1, 3:1 in groundwater showed better results compares to kaolin and magnetite. The optimum kaolin-magnetite adsorb Fe metal in 2:1 ratio with a stirring time of 60 minutes and the eficiency adsorption values is 73.35%. Based on this results, kaolin-magnetite composite can be relied in water treatment with the advantages of high adsorption capacity and the presence of magnetic properties to facilities the procces of transferring adsorbent and adsorbat.