Removal of Cu2+ from Aqueous Solution using Fly Ash


This research aims at investigating the utilization of fly ash as a low-cost adsorbent to remove copper ions from aqueous solutions such as wastewater. Fly ash dosage as well as initial copper ion concentration,temperature and pH value were varied to find the optimum conditions for Cu2+ adsorption by fly ash. The results from sorption process showed that the maximum adsorption rate was obtained at 50 mg/L when different dosage of fly ash was added into the solution, and it could be concluded that decreasing the initial concentration of copper ion is beneficial to the adsorption ability of fly ash. With the increase of pH value, the removal rate increased. When pH was 6, the removal rate reached the maximum of 99.60%. When initial copper content was 50 mg/L, pH value was 6, the adsorption capacity of fly ash sample reached 0.98 mg/mg. The main removal mechanisms were assumed to be the adsorption at the surface of the fly ash together with the precipitation from the solution.

Share and Cite:

J. Luo, H. Shen, H. Markström, Z. Wang and Q. Niu, "Removal of Cu2+ from Aqueous Solution using Fly Ash," Journal of Minerals and Materials Characterization and Engineering, Vol. 10 No. 6, 2011, pp. 561-571. doi: 10.4236/jmmce.2011.106043.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] H. Cho, D. Oh, K. Kim, A study on removal characteristics of heavy metals from aqueous solution by fly ash, Journal of Hazardous Materials. 27 (2005) 187-195.
[2] A. Papandreou, C.J. Stournaras, D. Panias, Copper and cadmium adsorption on pellets made from fired coal fly ash, Journal of Hazardous Materials. (2007) 1-10.
[3] S.B. Wang, T. Terdkiatburana, M.O. Tade, Single and co-adsorption of heavy metals and humic acid on fly ash, Separation and Purication Technology. (2007) 1-6.
[4] V.K. Guptaa, I. Ali, Utilisation of bagasse flyash (a sugar industry waste) for the removal of copper and zinc from wastewater, Separation and Purication Technology. 18 (2000) 131-141.
[5] E. Pehlivan, S. Cetin, B.H. Yank, Equilibrium studies for the sorption of zinc and copper from aqueous solutions using sugar beet pulp and fly ash, Journal of Hazardous Materials. B135 (2006) 193-199.
[6] J. Ayala, F. Bianco, P. Garcia, P. Rodriguez, J. Sancho, Asturian fly ash as a heavy metals removal material, Fuel 77 (1998) 1147–1154.
[7] H.A. Elliott, C.M. Denneny, Soil adsorption of cadmium from solutions containing organic ligands, J. Environ. Qual. 11 (1982) 658–663.
[8] M.M. Benjamin, J.O. Leckie, Multiple-site adsorption of Cd, Cu, Zn and Pb on amorphous iron oxyhydroxide, J. Colloid Interface Sci. 79 (1981) 209–221.
[9] R.O. James, T.H. Healy, Adsorption of hydrolysable metal ions at the oxide–water interface, J. Colloid Interface Sci. 40 (1972) 42–52.

Copyright © 2024 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.