Removal of Chromium from Aqueous Solution using Synthesized Polyaniline in Acetonitrile
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
[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.
[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.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:59299", author = "Majid Riahi Samani and Seyed Mehdi Borghei", title = "Removal of Chromium from Aqueous Solution using Synthesized Polyaniline in Acetonitrile", 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", keywords = "Polyaniline, Chromium, acetonitrile, Adsorption", volume = "6", number = "8", pages = "770-4", }