An Overview of the Studies about Heavy Metal Adsorption Process by Microorganisms on the Lab. Scale in Turkey

Abstract

Heavy metal ions, Cr(VI), Pb(II), Cu(II), Fe(III) and Ni(II) were removed from synthetic aqueous solutions by using Z. ramigem, an activated sludge bacterium, and R. arrhizus, a filamentous fungus. The adsorption isotherms were developed and it was seen that the adsorption equilibrium data fit both Freundlich and Langmuir isotherms. Heavy metal adsorption on free and immobilized cells was also investigated in various reactor types such as stirred tank reactors (single and multi-stage) and packed bed reactors.

Keywords:

• Heavy metal
• biosorption
• microorganisms
• batch stirred reactor
• packed bed