ABSTRACT 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.
Cite this paper
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.
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