Author/Authors :
Piri، Somayeh نويسنده Department of Chemistry, Faculty of Science, University of Zanjan , , Alikhani Zanjani، Zahra نويسنده 2Department of Environmental Science, Faculty of Science, University of Zanjan, 45371-38791 Zanjan, Iran , , Piri، Farideh نويسنده Department of Chemistry, Faculty of Science, Zanjan University, P.O. Box 45195-313 Zanjan, I.R. Iran , , Zamani، Abbasali نويسنده Environmental Science Research Laboratory, Department of Environmental Science, Faculty of Science, University of Zanjan, 45371-38791 Zanjan, Iran , , Yaftian، Mohamadreza نويسنده Department of Chemistry, Faculty of Science, University of Zanjan , , Davari، Mehdi نويسنده Department of Hepatitis and AIDS, Pasteur Institute of Iran ,
Abstract :
Background: Nowadays significant attention is to nanocomposite compounds in water cleaning. In this article the
synthesis and characterization of conductive polyaniline/clay (PANI/clay) as a hybrid nanocomposite with extended
chain conformation and its application for water purification are presented.
Methods: Clay samples were obtained from the central plain of Abhar region, Abhar, Zanjan Province, Iran. Clay
was dried and sieved before used as adsorbent. The conductive polyaniline was inflicted into the layers of clay
to fabricate a hybrid material. The structural properties of the fabricated nanocomposite are studied by X-ray
diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscope (SEM). The
elimination process of Pb(II) and Cd(II) ions from synthetics aqueous phase on the surface of PANI/clay as adsorbent
were evaluated in batch experiments. Flame atomic absorption instrument spectrophotometer was used for
determination of the studied ions concentration. Consequence change of the pH and initial metal amount in
aqueous solution, the procedure time and the used adsorbent dose as the effective parameters on the removal
efficiency was investigated.
Results: Surface characterization was exhibited that the clay layers were flaked in the hybrid nanocomposite. The
results show that what happen when a nanocomposite polyaniline chain is inserted between the clay layers. The
adsorption of ions confirmed a pH dependency procedure and a maximum removal value was seen at pH 5.0.
The adsorption isotherm and the kinetics of the adsorption processes were described by Temkin model and
pseudo-second-order equation. Time of procedure, pH and initial ion amount have a severe effect on adsorption
efficiency of PANI/clay.
Conclusions: By using suggested synthesise method, nano-composite as the adsorbent simply will be prepared.
The prepared PANI/clay showed excellent adsorption capability for decontamination of Pb ions from contaminated
water. Both of suggested synthesise and removal methods are affordable techniques.
