Removal of Cu2+ by Adsorption-Flocculation

Abstract

In this work, removal of Cu2+cations by adsorption-flocculation method was studied. In contrary of conventional adsorption processes, the method proposed supplies the removal of Cu2+ loaded adsorbent through the precipitation and thus the filtration step is skipped out. The precipitation of adsorbent is carried out by adding of a cationic surfactant in a certain amount so as to results in flocs and than the flocs are removed in a small retention time. The results of studies showed that copper was removed by adsorption and also precipitation on the clay surface. The Cu2+ loaded adsorbent was removed in amounts exceeding 90%. Besides, the amount of clay precipitated from the dispersion was high even in low copper concentrations in contrary of the cases at which only clay was used as adsorbent and it was not affected by solution’s pH.

Keywords

• Adsorption
• Copper
• Montmorillonite
• Flocculation
• Adsorption-flocculation

References

1. Malakul, P., Srinivasan, K.R., Wang, H.Y., Metal Adsorption and Desorption Characteristics of Surfactant- Modified Clay Complexes, Industrial Engineering Chemistry Reseach, 37, 4296-4301, 1998.
2. Atia, A.A., Adsorption of Chromate and Molybdate by Cetylpyridinium Bentonite, Applied Clay Science, 41, 73-84, 2008.
3. Lin, S-H., Juang, R-S., Heavy Metal Removal from Water by Sorption Using Surfactant Modified Montmorillonite, J. of Hazardous Materials, B92, 315-326, 2002.
4. Eren, E., Removal of Copper Ions by Modified Ünye Clay, Turkey, J. of Hazardous Materials, 159, 235-244, 2008.
5. Özdemir, G., Yapar, S., Adsorption and Desorption Behavior of Copper Ions on Na-montmorillonite: Effect of Rhamnolipids and pH, J. of Hazardous Materials, 166, 1307-1313, 2009.
6. Shen, Y-H., Removal of Phenol from Water by
7. Adsorption Flocculation using Organobentonite, J. of
8. Hazardous Materials, 36, 1107-1114, 2002.

9. Yapar, S., Physicochemical Study of Microwave- synthesized Organoclays, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 345, 75-81, 2009.
10. Lagaly, G., Weiss, A., Kolloid-Zeitschrift & Zeitschrift für Polymere 243, 48– 55, 1970.
11. Praus P., Turicová, M., Študentová, S., Ritz, M., Study of Ceyltrimethyl Adsorption on Montmorillonite, Journal of Colloid and Interface Science, 304, 29-36, 2006. and Cetylprydinium
12. Vazquez, A., Lopez, M., Kortaberria, G., Martin, L., Mondragon, I., Modification of Montmorillonite with Cationic Surfactants, Thermal and Chemical Analysis, Including CEC Determination, Applied Clay Science 41, 24-36, 2008.
13. Abou-El-Sherbini, K., Hassanien, M.M., Study of Organically Modified Montmorillonite Clay for the Removal of Copper (II), J. of Hazardous Materials, 184, 654-661, 2010.
14. Zhu, J., He, H., Zhu, L., wen, X., Deng, F., Characterization of Organic Phases in the Interlayer of Montmorillonite using FTIR and 13C NMR, J. of Colloid and Interface Science, 286, 239-244, 2005.
15. Kloprogge, J.J., Mahmutagic, E., Frost, R.L., Mid- infrared and Infrared Emission Spectroscopy of Cu- exchanged Montmorillonite, Journal of Colloid and Interface Science, 296, 640-646, 2006.
16. Madejová, J., Arvaiová, B., Komadel, P., FTIR Spectroscopic Characterization of Thermally Treated Cu2+, Cd2+ and Li+ Montmorillonites, Spectrochimica Acta Part A, 55, 2467-2476, 1999.