Neck Height Design for Separation of Copper (II) from Wastewater Using Foam Fractionation

Document Type : Technical Note

Author

Faculty Member, Industrial Chemistry, Group Fars Science & Technology Park

Abstract

In spite of different water resources available at many locations, adequate supplies of fresh water are rare for human demands due to various sources of pollution. Water pollutants can be classified as 1) suspended pollutants and, 2) dissolved pollutants. Dissolved pollutants consist of acids and heavy metallic ions. Foam fractionation method which is based on differences in surface activity is a new method whereby dissolved solids are adsorbed on the surface of liquid bubbles. Various purposes are served by the separation of metallic ions from water which include removal of metallic ions from water and extraction of precious metals from wastewater. In this method, water is mixed with a surfactant and fed continuously to a column. The supernatant foam thus formed starts to move along the column neck. Finally the foam breaks up into two fractions of heavy metal ions and pure water each leaving the column through separate outlets. In this study, neck height design and optimization is investigated to achieve the best copper ion removal efficiency. Based on our experiments, it was found that increasing neck height up to a certain height increased the enrichment ratio. Also increasing metal ion concentration for a given neck height improved recovery.

Keywords

References

1- Thompson, L. (2004). “Enrichment of biologically active compounds from selected plants using adsorptive bubble separation.” Ph.D. thesis, University of Munich, Germany.
2- Vander Toorn, J.D. (1987). “A biological approach to water purification: I. Theoretical aspects.” Aquatic Mammals, 13(3), 83-92.
3- Grieves, R.B. (1975). “Foam separation : A review.” The Chemical Engineering Journal, 9(2), 93-106.
4- Lemlich, R. (1972). Adsorptive bubble separation techniques, Academic Press, 3, 4, 43, 44.
5- Okamoto, Y., and Chou, E. (1978). Investigation of the removal of trace toxic heavy metal ions from waste- water by foam fractionation, Report number : PB-292706.DOE, Contract number: D1-14-30-3299.
6- Sone, A., and Grik, V. (2004). “Batch foam fraction of surfactants from aqueous solutions.” Acta Chim. Slov, 51, 687-698.
7- Kraynik, A. M. (1983). Foam drainage, SANDIA report, SAND 83-0844.
8- Chen, S., Timmons, M.B., Bisogni, J.J., and Aneshansleg, D.J. (1994). “Modeling surtactant removed in foam fractionation: I. Theoretical development.” Aquacultural Engineering Reef Aquarum Information Depot Aqua C. Eng. 13, 183-200.
9- Kinoshita, T., Kita, S.A. Ozawa, S., Nii, S., Kawaizumi, F., and Takahashi, K. (2004). “Continuous recovery of gold (III) via foam separation with nonionic surfactant.” Journal of Minerals and Materials Characterization & Engineering, 3 (1), 53-63.
10- Kinoshita, T., Kita, S.A. Ozawa, S., Nii, S., Kawaizumi, F., and Takahashi, K. (2003). “A study on gold (III) recovery via foam separation with nonionic surfactant in bath mode.” Journal of Mineral & Materials Characterization & Engineering, 2 (2), 71-82.
11- Maruyama, H., Suzuki, A., and Seki, (2000). “Adsorption of water soluble proteins onto bubbles in continuous foam separation.” J. coll. Int. Sci., 224, 76-83.
12- Konduru, R. (1992). “Adsorption studies of aqueous zinc ions by foam fractionation in simple mode.” J. Chem. Eng. Japan, 25 (5), 555-560.
Journal of Water and Wastewater; Ab va Fazilab ( in persian )
Volume 18, Issue 2 - Serial Number 2
Serial number:62
May and June 2007
Pages 71-75

Files

Share

How to cite

Statistics