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The removal of copper ions from wastewater by ion exchange has been studied using an iminodiacetate resin. The capacity of the resin for the copper ions has been determined to be 2.30mmol·g−1 by measuring the equilibrium isotherm at 25°C and initial pH value of 3.5 where the final equilibrium pH value is 5. An analysis of equilibrium isotherm models showed that the best fit model was the Langmuir–Freundlich...