Study of the sorption kinetic of Fe (III) by poly(Hydroxamic acid) chelating exchanger prepared from poly (Styrene-Co- Ethylacrylate)

Abstract

The aim of this research is showing the preparation of poly(Styrene-Co-Ethyl
acrylate) which obtained by a free radical initiation process for co-polymerization
between Ethlyacrylate and styrene with a mixing ratio (1:1) using benzoyl peroxide as
an initiator at (70°c) and (10% ) ratio of conversion. Conversion of the ester group of
the (CPS-EA) in to hydroxamic acid was carried out by treatment of (CPS-EA) with
hydroxyl amine hydrochloride in alkaline medium at (pH=13) using sodium
hydroxide. The poly hydroxamic acid was identified by (FT-IR) spectroscopy:
Sorption capacity (qe) of the metal ion (Fe3+) was determined This study also shows
the effect of initial (pH), temperature and time on the sorption capacity of (Fe3+ ) by
(PHA).The sorption capacity of (Fe3+) on to (PHA) resin which decrease as
temperature increases indicates that the sorption was exothermic process . The values
of (ΔG°) was negative, showing that the sorption of (Fe3+) on to (PHA) resin is
spontaneous .