Simple, efficient and eco-friendly electrochemical method for removal and recovery of Cd(II) from wastewater has been studied. Experiments were carried out in a batch electrochemical reactor with iron electrodes. The removal was examined at different pH values and electrical potentials. It was observed that the experiments carried out at 20 V and at pH 9 were sufficient for the maximum removal of Cd(II). This method is highly efficient in removal of Cd(II) from wastewater containing up to 1000 mg L−1. The removal is faster in comparison with the adsorption on activated carbon, which is one of the most important requirements for practical application of this treatment method. In this process, the use of different electrical potentials can provide a wide range of pH values for performing this process. The removal data were used to determine the adsorption kinetics by using the first-order adsorption kinetics model. The data can be analyzed in terms of various adsorption models. The results of Cd(II) removal from real samples indicate that the method used in this study can provide an efficient and cost-effective technology for the treatment of Cd(II)-containing wastewater. The parameters can be used for designing a plant for an economical treatment of Cd(II)-rich water and wastewater.
Russian Journal of Applied Chemistry – Springer Journals
Published: Jun 17, 2014
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