Using amberlite XAD-4 to absorbtion of heay metals Co and Cu from Caspian Sea's water samples

Water pollution by heavy metals causes serious ecological problems in the world. Therefore, today determination of heavy metals such as Co and Cu in the environmental samples is required. Amberlite XAD-4 (polystyrene-divinylbenzene polymer) is a frequently used resin in analyses methods, thanks to its good physical and chemical properties, such as porosity, high surface area, durability and purity. In this study, Co and Cu ions were adsorbed during passage through amberlite XAD-4 resin. Also the influence of pH was studied and the best pH for this study was between 6 and 7.5 with a recovery of higher than 90%. The proposed procedure was applied for Co and Cu determination by Flame Atomic Adsorption Spectroscopy (FAAS) in natural water samples. The achieved recovery and its standard deviation, measured by standard addition technique showed that the proposed procedure had good accuracy, enrichmant factor, preconcentration factor and simplicity.