Abstract
This paper deals with a new application of polypyrrole (PPy) and polyaniline (PAni) electroactive polymers synthesized chemically, coated on sawdust and then used for removal of NO2 - ions from aqueous solutions. Adsorption studies were performed using both batch and column systems at room temperature. The effects of some important parame- ters such as initial concentration, adsorbent dosage, and contact time on the uptake of NO2 - ions were also investigated. PPy and PAni conducting electroactive polymers were found to be effective adsorbents for the uptake of nitrite ions from aqueous solutions. Adsorption studies have shown that pH of the nitrite solution has an important influence on the nitrite ion uptake. In order to find out the possibility of the frequent use of the adsorbent, desorption study was also carried out in this investigation.
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