Preparation and application of magnetic Ni nanocomposite (Fe۳O۴@SiO۲@Ni۲+) in adsorption of azo dyes

In this study, preparation, characterization and adsorption properties of the magnetic nanocomposite Fe۳O۴@SiO۲@Ni۲+ made by chemical co-precipitation method were investigated. The structure of synthesized nanocomposite was characterized by using FTIR, XRD, VSM, FE-SEM, EDX-MAP, TGA, BET, and ICP-OES analyses. The introduced nanocomposite exhibited a great tendency towards the azo and anionic dyes in aqueous media. The adsorption parameters were evaluated to find the optimal conditions of pH= ۷, T= ۲۹۳ K, amount of adsorbent= ۱۰ mg, t= ۱۰ min, and the initial concentration of Acid violet ۵ dye= ۲۰ mg/L. The isotherm and kinetic models were investigated by using adsorption equilibrium data. The magnetic nanocomposite gave a high maximum adsorption capacity (qmax) and adsorption percentage (%A) under optimal conditions.

Keywords:

Magnetic nanocomposite , adsorbent , azo dye , water treatment.