Abstrait

Removal Of Cd+2 By Starch As A Natural Polymer From Aqueous Solutions

J.Ghasemi, Gh.Mansoori, S.Asadpour, M.Noroozi

Attempts to solve the problem of heavy metals removal and recovery from waste waters and sewage have led to the development and application of several techniques. One of the most important techniques involves application of starch and starch derivatives containing amide groups as functional group. The heavy metal ions such as cadmium, copper, lead, cobalt, zinc, nickel and mercury are adsorbed quantitavely during passage of aqueous solutions through the starch and starch derivatives beads. After the separation and preconcentration stage, then the solution filtered and the analyte determines by flame atomic adsorption spectrometry (FAAS). There are different factors which affect the metal ion adsorption on starch adsorbent; such as pH of sample solution, metal ion concentration, type of starch and starch derivatives, contact time, ionic strength and temperature. In this work the effect of the important factors and also the effect of interference ions are studied on the removal of Cd+2 from aqueous solution.