Abstract
Polypyrrole salt of desired structure has been synthesized sonochemically and characterized by chemical, spectral and thermal analysis. Surface morphology of the polymer is examined by scanning electron microscope (SEM). Chromium(VI) sorption-desorption properties of the polymer has been studied through optimization of pH, contact time and temperature. Selectivity towards Cr(VI) sorption in the presence of competitive ions has been tested. The relevant kinetic parameters are evaluated to elucidate the sorption-desorption mechanism. The metal binding capacity of the polymer is compared with the commercially available ion-exchangers.
Acknowledgments
The authors gratefully acknowledge the financial support provided by CSIR (No.01-2392/10/EMR-II & No.01-2444/10/EMR-II), New Delhi.