動電現象を用いた重金属回収に関する研究 [in Japanese] Research on the Heavy Metal Recovery using the Electrokinetic Phenomenon [in Japanese]
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Recently, the pollution of the soil by heavy metal elution from industrial effluents and so on becomes serious with the development of the industry. Until now, many techniques such as diffusion prevention and elution prevention, extraction and removal, decomposition and decontamination have been proposed in the method of processing of polluted soil. In recent years, especially the method for using the electrokinetic phenomenon is noticed. In this method, the paired electrode is inserted in the soil, and the DC voltage is applied. Then, the electrokinetic phenomenon by the procedure of the superscription, namely electrophoresis, electroendosmose, electrolysis, is utilized.<br>However, in the conventional research, recovery quantity of the heavy metal ion is low, and the improvement in the recovery efficiency is desired in order to use this technique for the repair of the polluted soil. Following fact is mentioned as the reason why the recovery efficiency of the heavy metal ion lowers. When the heavy metal ion has moved from the anode to the cathode, it combines with hydroxide ion made by the electrolysis of the water at the cathode, and it has precipitated as a hydroxide. The purpose of this study is prevention of the alkalinization by adding the acid at the proper quantity, and improves the recovery efficiency of the heavy metal ion.
- IEEJ Transactions on Fundamentals and Materials
IEEJ Transactions on Fundamentals and Materials 125(4), 337-342, 2005-04-01
The Institute of Electrical Engineers of Japan