Removal of Cu (II) ions from aqueous solution by sawdust of wood was investigated as function of time, pH, adsorbent concentration and adsorbate concentration and temperature. The amount of Cu (II) ions adsorbed onto sawdust increased with the increase in reaction time, concentration and temperature. Kinetic studies showed that adsorption process followed first order kinetic model. Langmuir and freundlich equations were applied to the observed data, which showed that Cu (II) ions adsorption obeys both langmuir and freudlich isotherms. Thermodynamics parameters such DHO, DSO and DGO were also estimated which suggested that the adsorption of Cu (II) ions on sawdust of wood was an endothermic and spontaneous process
A A SHAH ,H U RAHMAN ,M SHAKIRULLAH ,I AHMAD ,S SHAH ,
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