Advertisement

Kinetics and thermodynamics study of lead adsorption on to activated carbons from coconut and seed hull of the palm tree

  • S. Gueu
  • B. YaoEmail author
  • K. Adouby
  • G. Ado
Article

Abstract

The kinetic and thermodynamic of the bath sorption of lead (Pb) on to activated carbon from Coconut (CA) and Seed hull of the Palm tree (GA) have been investigated. The effects of initial Pb concentration, contact time and temperature were examined. The results showed that the adsorption capacities of the activated carbons increased with the initial lead concentration. The process sorption followed a pseudo first order kinetics and parameters such as Ea and k0 were determined. It could be best fitted by the Langmuir and Freundlich isotherms. From the first, the equilibrium sorption capacities of lead ion were determined and found to be respectively 4.38 and 3.77 mg/ g for CA and GA at 60 °C. The thermodynamic parameters such as dGH, dGS and dGG were computed from the experimental data. These values show that the adsorption is endothermic and non spontaneous. Moreover, the relative weak values of dGH (∼5 kcal/mol) confirm a physical adsorption. The maximum adsorptions were obtained at 60 °C, pH 4 and with a Pb initial concentration of 100 mg/L.

Keywords

Heavy metals activated carbon langmuir and freundlich isotherms adsorption kinetic thermodynamic 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Assenato, G., Paci, C., Baser, M.C., Molinini, R., Candela, R. M., Altamura B.M., Giorgino, R., (1986). Sperm count suppression without endocrine dysfunction in lead-exposed men. Arch. Environ. Health, 4, 387–390.CrossRefGoogle Scholar
  2. Carrasquero Duran, A., Flores, I., Perozo, C and Pernalete, S., (2006). Immobilization of lead by vermicompost an its effect on white bean (Vigna Sinenis var. Apure) uptake. Int. J. Environ. Sci. Tech., 3(3), 203–212.CrossRefGoogle Scholar
  3. Freundlich, H.M.F., (1906). Uber die adsorption in losungen. Z. Phys. Chem., 57(A), 385–470.Google Scholar
  4. Gueu, S., Yao, B, Adouby, K., Ado, G., (2006). Heavy metals removal in aqueous solution by activated carbons prepared from coconut shell and seed shell of the palm tree. J. Appl. Sci., 6(13), 2789–2793.CrossRefGoogle Scholar
  5. Goyer R.A., Chisolon, I.J., (1972). Lead in metallic contaminations and human health. Lee, D.H.K. (Ed). Academic Press, New York, P.57.Google Scholar
  6. Ho, Y.S., Ofomaja, A.E., (2005). Kinetics and thermodynamics of lead ion sorption on palm kermel fibre from aqueous solution. Proc. Biochem., 40, 3455–3461.CrossRefGoogle Scholar
  7. Krishnan, K.A., Anirudhan T.S., (2003). Removal of cadmium (II) from solutions by steam-activated sulphurised carbon prepared from sugar-cane bagasse pith: Kinetics and equilibrium studies, Water SA., 29(2), 147–156.CrossRefGoogle Scholar
  8. Langmuir, I., (1916). The constitution and fundamental properties of solids and liquids. J. Am. Chem. Soc., 38(11), 2221–2295.CrossRefGoogle Scholar
  9. Lagergren, S., (1898). Zur theorie der sogenannten adsorption gelöster stoffe, Kungliga Svenska Vetenskapsakademiens. Handlingar, 24(4), 1–39.Google Scholar
  10. Serkar, M., Sakthi, V. and Rengaraj, S., (2004). Kinetics and equilibrium adsorption study of lead (II) onto activated carbon prepared from coconut shell. J. Coll. Inter. Sci., 279(2), 307–307.CrossRefGoogle Scholar
  11. Sreedhar, M.K., Madhukumar, A., Anirudhan, T.S., (1999), Evaluation of an adsorbent prepared by treating coconut husk with polysulphide for the removal of mercury from wastewater. Indian J. Eng. Mater. Sci., 6(5), 279–285.Google Scholar

Copyright information

© Islamic Azad University 2007

Authors and Affiliations

  1. 1.Institut National Polytechnique Félix Houphouët-Boigny, Département Génie Chimique et Agroalimentaire, Laboratoire des Procédés Industrielsde Synthèse et de l’EnvironnementYamoussoukroCôte d’Ivoire

Personalised recommendations