Studying the effect of adding nano-carbon to poly (hydroxamic acid) prepared from poly (methyl methacrylate) on the adsorption capacity of chromium (III) and cadmium (II) ions.

Abstract

Using the polymerization of free radicals by the initiator bnzoyl perduoxide at a temperature (70oC) and a conversion rate of 10%, and then converting the resulting polymer to polyhydroxamic acid by treating the polymer with hydroxylamine hydrochloride in an alkaline medium (pH = 13) with the use of potassium hydroxide with thermal escalation at a temperature of (70oC) for a period of (100) hours. The resulting compound was diagnosed using IR-FT spectroscopy, Polyhydroxyamic acid was mixed with nanocarbons. Polyhydroxamic acid was used to assess the retention capacity of chromium (Cr+3) and cadmium (Cd+2) ions before and after adding the nanocarbon. The influence of time, temperature, and pH on the retention capacity (Qe) of chromium and cadmium heavy metal ions was also investigated. The heat of adsorption was determined, and through the values of the heat of adsorption for chromium and cadmium ions, it was found that the adsorption is physical. The adsorption capacity was higher in the presence of nanocarbons , the factors that affect the adsorption capacity such as time, acidity function and temperature were studied , Where the adsorption capacity increases with increasing time, and the highest adsorption capacity is at pH = 6 , where the adsorption rate decreases when the acidity increases and decreases from pH equal six.