Abstract
Heavy metal ions like copper(II) in waste water are hazardous to the environment. Acid mine drainage, plating and brass plating industries contain undesired amount of copper(II) ions. According to the water standards heavy metal ion level in waste water must be controlled and reduced to the desired value. The adsorption of heavy metal ions on the biomass is a very beneficial property of microorganisms. Because of such property, microorganisms have been successfully used as sorbing agents for heavy metals. At the adsorption, a rapid equilibrium is established between adsorbed metal ions on the cell(qeq), and unadsorbed metal ions in solution(Ceq). This equilibrium could be represented by the Freundlich adsorption isotherm equation given below $$qeq = K_F Ceq^{1/n} $$ (1) where KF and n are Freundlich constants. This equation can be linearized and the constants can be determined(1, 2).
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