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Comparative Study on Recovery of Nickel by Ion Exchange and Electrodialysis  

Sim, Joo-Hyun (Department of Environmental Engineering, Inha University)
Seo, Hyung-Joon (Department of Environmental Engineering, Inha University)
Seo, Jae-Hee (Department of Environmental Engineering, Inha University)
Kim, Dae-Hwan (Department of Environmental Engineering, Inha University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.28, no.6, 2006 , pp. 640-647 More about this Journal
Abstract
It is difficult to treat wastewater involved in heavy metal in electroplating industry. Recently, many industries adopt the clean technology to prevent production of pollutant in the process or reuse after the appropriate pollutant treatment. In this study, we estimate the ability of recovery of nickel and the efficiency using lab-scale ion exchange and electrodialysis process with electroplating industry wastewater. In the ion exchange experiments with 5 types of resin, the result showed that S 1467(gel-type strong acidic cation exchange resin) has the highest exchange capacity. And it showed that the 4 N HCl has the highest in regeneration efficiency and maximum concentration in the regeneration experiments with various kinds md concentration of the regenerant. During the electrodialysis experiments, we varied the current density, the concentration of electrode rinse solution, the flow rate of concentrate and electrode rinse solution in order to find the optimum operating condition. As a result, we obtained $250A/m^2$ of current density, 2 N $H_2SO_4$ of concentration of electrode rinse solution, 30 mL/min of flow rate of concentrate and electrode rinse solution as the best operating conditions. We performed the scale-up experiments on the basis of ion exchange and electrodialysis experiments. And we obtained the experimental result that exchange capacity of S 1467 was 1.88 eq/L resin, and regeneration efficiency was 93.7% in the ion exchange scale-up experiment, we also got the result that concentration and dilution efficiency increased, and current efficiency kept constant in the scale-up experiments.
Keywords
Nickel; Recovery; Ion Exchange; Electrodialysis;
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