Mohammad Yousef Roghani - Department of Chemical and Petroleum Engineering, Sharif University of Technology, Azadi Ave., P.O. Box۱۱۳۶۵-۹
Masoud Aghajani - Department of Chemical and Petroleum Engineering, Sharif University of Technology, Azadi Ave., P.O. Box۱۱۳۶۵-۹
Seyed Mehdi Borghei - Department of Chemical and Petroleum Engineering, Sharif University of Technology, Azadi Ave., P.O. Box۱۱۳۶۵-۹

Polyaniline/Polyvinyl Alcohol (PANi/PVA) composite was examined for Arsenite removal from aqueous solution. The results indicate that PVA as an additive has effective role in increasing adsorptive capacity of PANi by changing morphlogy and extending its active surface which is a good feature for the removal mechanism (Surface Adsorption). Maximum arsenic removal efficiency was obtained when composite was synthesized in presence of 1.5 gr/lit of PVA. Theadsorption process is pH dependent and As(III) removal consistently increases with pH enhancement and equilibrium time is 1 hour. Although it is expected that by increasing composite dosage, adsorption become more efficient but at high dosages of adsorbent, agglomeration occurs,so the optimum composite dosage is 2(g/lit). Appropriate arsenite removal was obtained at trace levels (78% removal at 0.5 ppm initial concentration). The results of study have good compatibility with adsorption isotherm equations (Langmuir and freundlich).the composite also shows good desorption ability

Polyaniline Composite, Polyvinyl Alcohol, Arsenite Removal, Arsenic, Adsorption