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

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.

This is a preview of subscription content, log in to check access.

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.

    Article  Google 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.

    Article  Google Scholar 

  3. Freundlich, H.M.F., (1906). Uber die adsorption in losungen. Z. Phys. Chem., 57(A), 385–470.

    CAS  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.

    Article  CAS  Google 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.

  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.

    Article  CAS  Google 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.

    Article  CAS  Google Scholar 

  8. Langmuir, I., (1916). The constitution and fundamental properties of solids and liquids. J. Am. Chem. Soc., 38(11), 2221–2295.

    Article  CAS  Google 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.

    Article  Google 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.

    CAS  Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to B. Yao.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Gueu, S., Yao, B., Adouby, K. et al. Kinetics and thermodynamics study of lead adsorption on to activated carbons from coconut and seed hull of the palm tree. Int. J. Environ. Sci. Technol. 4, 11–17 (2007). https://doi.org/10.1007/BF03325956

Download citation

Keywords

  • Heavy metals
  • activated carbon
  • langmuir and freundlich isotherms
  • adsorption
  • kinetic
  • thermodynamic