ORIGINAL RESEARCH
Removal of Cadmium and Lead from Aqueous Solution by Calcite
Ö. Yavuz, R. Guzel, F. Aydin, I. Tegin, R. Ziyadanogullari
 
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Dicle University, Faculty of Science and Art, Department of Chemistry, TR 21280, Diyarbakir, Turkey
 
Pol. J. Environ. Stud. 2007;16(3):467–471
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ABSTRACT
The removal of toxic cadmium(II ) and lead(II ) from aqueous solutions was investigated using calcite, which is inexpensive and widespread over the globe, as the effective inorganic adsorbent. The experimental data of the removal equilibrium were correlated by either the Langmuir or Freundlich equations. Results indicate that the Langmuir model gave a better fit to the experimental data than the Freundlich equation. Maximum adsorption capacities were determined as 18.52 mg/g Cd and 19.92 mg/g Pb for natural calcite at 25°C, respectively.
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