In the present study, uptake studies of transition metal ions like Cu 2+ and Co 2+ were carried out with Nafion membrane. The effects of different experimental conditions were evaluated. The Nafion membrane was pre-treated by two different ways and used for the studies. The studies were also carried out in presence of complexing agents like ethylenediamine and EDTA. It was seen that the maximum uptake occurred in the pH range of 3-5. The uptake capacity of Nafion was affected by the pre-treatment procedure. This was attributed to the changes of Nafion structure. The presence of different Complexing agents in solution affects the uptake capacity. This could be understood from the strength of the complexes formed by metal ions and thus the reduction in the uptake capacity. The formation of negatively charged complexes by EDTA results in a very low uptake of the metal ions.
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