@article{(Open Science Index):https://publications.waset.org/pdf/10240, title = {Removal of Chromium from Aqueous Solution using Synthesized Polyaniline in Acetonitrile}, author = {Majid Riahi Samani and Seyed Mehdi Borghei}, country = {}, institution = {}, abstract = {Absorptive characteristics of polyaniline synthesized in mixture of water and acetonitrile in 50/50 volume ratio was studied. Synthesized polyaniline in powder shape is used as an adsorbent to remove toxic hexavalent chromium from aqueous solutions. Experiments were conducted in batch mode with different variables such as agitation time, solution pH and initial concentration of hexavalent chromium. Removal mechanism is the combination of surface adsorption and reduction. The equilibrium time for removal of Cr(T) and Cr(VI) was about 2 and 10 minutes respectively. The optimum pH for total chromium removal occurred at pH 7 and maximum hexavalent chromium removal took place under acidic condition at pH 3. Investigating the isothermal characteristics showed that the equilibrium adsorption data fitted both Freundlich-s and Langmuir-s isotherms. The maximum adsorption of chromium was calculated 36.1 mg/g for polyaniline}, journal = {International Journal of Materials and Metallurgical Engineering}, volume = {6}, number = {8}, year = {2012}, pages = {747 - 750}, ee = {https://publications.waset.org/pdf/10240}, url = {https://publications.waset.org/vol/68}, bibsource = {https://publications.waset.org/}, issn = {eISSN: 1307-6892}, publisher = {World Academy of Science, Engineering and Technology}, index = {Open Science Index 68, 2012}, }