الفهرس 
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Abstract
In this study, a novel polyurethane/organobentonite/iron oxide (PUF/OB/IO) magnetic nanocomposite adsorbent was prepared via in situ polymerization of toluene diisocyanate (TDI) and polyol in presence of 5 wt% OB/IO. OB was derived from natural bentonitic clay mined from Qalamshah depression-Fayoum government-Egypt.
Different characterization means were employed to investigate the physicochemical characteristics of the natural bentonite, sodium exchanged bentonite, organobentonite and PUF/OB/IO nanocomposite such as XRD, IR, SEM and TEM techniques.
The efficiency of the raw bentonite and the prepared nanocomposite toward removal of cadmium and zinc ions from aqueous solutions and natural water samples was evaluated during this study. The applicability of the obtained nanocomposite for removal of methylene blue (MB) and methyl orange (MO) dyes – as organic pollutant models from aqueous solutions was also investigated in detail.