Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 31903
Removal of Chromium from Aqueous Solution using Synthesized Polyaniline in Acetonitrile

Authors: Majid Riahi Samani, Seyed Mehdi Borghei


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

Keywords: Polyaniline, Chromium, acetonitrile, Adsorption

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 2071


[1] Z. Kwalski , "Treatment of chromic tannery wastes", Journal of Hazardous Materials, vol. 37,1994, pp. 137-144.
[2] N. S. Rawat , D. C.Sing, "Removal of chromium in bituminous coal, Asian Environment", vol. 14, 1992, pp. 30-41
[3] K. Selvarj, S. Manonmain, S. Pattabhi, "Removal of hexavalent chromium using distillery sludge", Bioresource Thechnology, vol. 89, 2003, pp.207-211.
[4] M. Liu, H. Zhang, X. Zhang, U. Deng, W. Liu, H. Zhan, "Removal and recovery of chromium from aqueous solutions by a spheroidal cellulose adsorbent", Water Research, vol. 73, 2001, 322-328.
[5] S. Babel , T. A. Kurniawan," Cr(VI) Removal from synthetic waste water using coconut shell charcoal and commercial activated carbon modified with oxidizing agents and/or Chitosan", Chemosphere, vol. 54, 2004, pp.951-967.
[6] M. Kobya , " Removal of Cr(VI) from aqueous solutions by adsorption onto hazelnut shell activated carbon: kinetic and equilibrium studies", Bioresource Technology, vol. 91, 2004, pp. 317-321.
[7] A. Olad, R. Nabavi, " Application of polyaniline for the reduction of toxic Cr(VI) in water", Journal of Hazardous Materials, vol. 147,2007, pp. 845-851.
[8] P. A. Kumar, S. Chakraborty, M. Ray, " Removal and recovery of chromium from wastewater using short chain polyaniline synthesized on jute fiber", Chemical Engineering Journal, vol. 141,2008, pp. 130-140 .
[9] S. T. Farrell, C. B. Breslin, " Reduction of Cr(VI) at a polyaniline film: influence of film thickness and oxidation state" , Environmental Science Technology, vol. 38, 2004, pp. 4671-4676.
[10] L. A. M. Ruotolo, J. C. Gubulin, "Chromium (VI) reduction using conducting polymer films", Reactive and Functional Polymer,vol. 62, 2005, pp. 141-151.