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    STUDIA PHYSICA - Issue no. SPECIAL ISSUE / 2001  

Authors:  I. PETER, R. TURCU, C. BINDEA, A. BOT.
  Abstract:  Conducting polymers like polypyrrole are very promising materials for uptake the metal ions from solution. Polypyrrole is one of the most frequently investigated. This is owing to its ease of preparation relatively high stability compared to other conducting polymer and the ready commercial availability of many of its derivatives. The electroactive polypyrrole used in this study has been synthesized in the form of nanocomposites using ultra fine SiO2 particles, through chemical oxidative polymerization of pyrrole in the presence of FeCl3. The rates of metals uptake from acidic solution is indicated by the decrease of the metal concentration in solution, which was determined by atomic absorbtion spectroscopy. The effects of the reduction of metals from acid solution by PPy-SiO2 nanocomposites are also investigated using UV-VIS absorption spectroscopy. Our results demonstrate that this simple procedure could be successfully applied for the treatment of industry wastewater containing metal ions of need to be extracted or their concentration lowered, before the effluents can be discharge into the environment.  
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