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Factors and Kinetics Involved in Adsorption of Copper from Aqueous and Waste Water onto Pongamia Pinnata

M. Mamatha, H.B.Aravinda, E.T.Puttaiah, S.Manjappa

Presence of copper in the water used for various activities affects living beings in its own way depending on its concentration. Considering the effects of high dose of copper concentration on humans and animals, it is important to remove this metal ion from industrial effluent before discharge to environmental stream. In this regard Pongamia pinnata tree bark is proven to be an effective and promising adsorbent. Removal of copper ion from aqueous and industrial waste water depends on pH, concentration of metal ion, concentration of adsorbent, contact time and agitation. Equilibrium adsorption data was tested for the Langmuir, Freundlich and Tempkin equations. Adsorption isotherm studies indicated that Langmuir model fits better for the present case. Adsorption kinetics data were modeled using the pseudo-first, pseudo-second order, Elovich and intra particle diffusion models. Adsorption data was best suited by second order model. Hence, this adsorbent has a potential to be used in the industries emitting copper ions in its effluent.