Removal of copper ions from aqueous solutions using polypyrrole and its nanocomposites

Document Type : Full Lenght Research Article


1 School of Chemical, Petroleum, and Gas Engineering, Semnan University,Semnan, Iran.

2 Chemical Engineering Department, Shomal University, Amol, Iran.


In this article, preparation of polypyrrole and its nanocomposites as adsorbents were
discussed and the capability of separation of copper ions from aqueous solution were studied.
Polypyrrole was prepared by chemical oxidative polymerization method of pyrrole using
FeCl3 as an oxidant. The removal of Cu (II) was investigated using PPy, PPy/TiO2 and
PPy/TiO2/DHSNa nanocomposites. The products were investigated in terms of morphology
and chemical structure with scanning electron microscopy (SEM) and Fourier-transform
infrared spectroscopy (FTIR). Batch studies were performed to evaluate the influence of
various experimental parameters such as pH, ion dosage and contact time. Optimum
conditions for copper ions removal were found to be pH 3, ion dosage of 50 mg L-1 and the
equilibrium time equals to 30 minutes. It was also found that the equilibrium adsorption
isotherm was better described by Freundlich adsorption isotherm model.


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