Adsorption of Cr(Vi) from Aqueous Solution Using Low Cost Adsorbent: Equilibrium Study

  • Tariq S. Najim University of Al-Mustansiriyah
  • Suhad A.A.R. Yasin University of Duhok
Keywords: Adsorption, pine cone, Cr (VI), kinetic, adsorption, isotherm, equilibrium


The present investigation deals with the utilization of pine cone(PC)  as adsorbent for the removal of chromium Cr(VI) from aqueous solution. A series of experiments were conducted in a batch system to evaluate the effect of system variables. The effect of pH, initial Cr(VI) concentration, contact time, and adsorbent dosage, were considered. The optimal pH values of Cr(VI) removal by pine cone was 1.0. The time required for equilibrium was found to be about 100 minutes. The initial Cr(VI) concentration and adsorbent dosage was found to have large effect on the adsorption of Cr(VI). The equilibrium data were tested using several isotherm models, Langmuir, Freundlich, Tempkin and Dubinin-Radushkevich (D-R) equations. The maximum adsorption capacities Qm at different dose, it was 37.594mg/g.

Author Biographies

Tariq S. Najim, University of Al-Mustansiriyah

Al-Mustansiriyah University, College of science, Chemistry  Dept. , Iraq.

Suhad A.A.R. Yasin, University of Duhok

Duhok University, Faculty of Science, Chemistry Dept. , Kurdistan – Region, Iraq.


Baral S. S.,( 2007), Adsorption of hexavalent chromium from aqueous solution using various adsorbents, Ph.D-Thesis,National Institute of Technology Rourkela India.
Cieslak-Golonka, M.,(1996),Toxic and mutagenic effects of chromium (VI) Polyhedron, 15 (21), 3667-3918.
Dubinin M. M. and Radushkevich L. V.,( 1947), Equation of the characteristic curve of activated charcoal, Chem. Zentr., 1,875.
Dubinin M. M., (1960), The potential theory of adsorption of gases and vapors for adsorbents with energetically nonuniform surface, Chem. Rev., 60, 235-266.
El Nemr A., (2007), Pomegranate husk as an adsorbent in the removal of toxic chromium from wastewater, Chemistry and Ecology, 23(5), 409-425.
EPA, (1990), Environmental Pollution Control Alternatives. Environmental Protection Agency, EPA/625/5-90/025, EPA/625/489/023, Cincinnati, US.
Freundlich H., (1906), Uber die adsorption n Iosungen, Z. phys. Chem. 57, 385-470.
Gupta, V.K., Rastogi, A., Nayak, A.,( 2010), Adsorption studies on the removal of
hexavalent chromium from aqueous solution using a low cost fertilizer industry.
Karthikeyan, T., Rajgopal, S., Miranda, L.R.,( 2005),Chromium (VI) adsorption from aqueous solution by Hevea brasilinesis sawdust activated carbon. Journal of Hazardous Materials B 124, 192–199.
Langmuir I., (1916),The constitution and fundamental properties of solids and liquids, J. Am. Chem. Soc., 38, 2221.
Li Y., Gao B., Wu T., Sun D. Li X., Wang B. and Lu F.,( 2009 ),Hexavalent chromium removal from aqueous solution by adsorption on aluminum magnesium mixed hydroxide, Water Research, 43,3067-3075.
Patterson J. W., (1985), Industrial Wastewater Treatment Technology. 2nd Ed. Butterworth-Heinemann, London.
Rao, R.A.K., Rehman, F., (2010),Adsorption studies on fruits of Gular (Ficus glomerata):removal of Cr(VI) from synthetic wastewater. Journal of Hazardous Materials 181, 405–412.
Sharma, Y.C., (2003),Cr(VI) removal from industrial effluents by adsorption on an indigenous low-cost material. Colloids and Surfaces A: Physicochemical and Engineering Aspects 215, 155–162.
Sharma, Y.C., Uma, Srivastava, V., Srivastava, J., Mahto, M., (2007), Reclamation of Cr(VI) rich water and wastewater by wollastonite. Chemical Engineering Journal 127, 151–156.
Tariq S. Najim ,Suhad A. Yassin,(2009), Removal of Cr(VI) from Aqueous Solution Using Modified Pomegranate Peel: Equilibrium and Kinetic Studies, E-J. of chemistry 6(S1) 5129-5142 (2009).
Tempkin M. J. and Pyzhev V.,( 1940), Recent modification to Langmuir isotherms, Acta Physiochim. URSS, 12, 217- 222, waste material. Journal of Colloid and Interface Science 342, 135–141.
Dubinin M. M., (1960), The potential theory of adsorption of gases and vapors for adsorbents with energetically non uniform surface, Chem. Rev., 60, 235-266.
How to Cite
Najim, T., & Yasin, S. (2013). Adsorption of Cr(Vi) from Aqueous Solution Using Low Cost Adsorbent: Equilibrium Study. Science Journal of University of Zakho, 1(2), 758-767. Retrieved from
Science Journal of University of Zakho