<紀要論文>
Use of Auxiliary Electrode to Prevent Alkalinization of Soil in Electrokinetic Remediation

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概要 We devised an improved electrokinetic remendiatioin method in whoch an auxiliary electrode was placed at the cathode-side end of the soil to be treated. The electric potential difference between tne a...node and the auxiliary electrode was fixed constant whole that between the cathode and the auxiloary electode was controlled to make the auxiliary electode function as a secondary anode. To test the performance of the method, we carried out a bench scale remediatioin experiment on cadmium-contaminated soil, in which the electrodes and soil etc. were arranged in the following order; anode|anolyte|soil-auxiliary electorode|electolytic diaphragm|H-saturated cation exchange resin|catholte|cathode. During 112h of the treatment, the net voltage applied to the soil could be maintained and the alkalinization of the soil could be prevented partly due to the acid-neutralization in the cation exchange resin, and partly due to the secondary anode These results indicated the auxiliary anode was effective to improve the efficiency of electrokinetic remendiation of heavy metals contaminated soils.続きを見る

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登録日 2009.04.22
更新日 2017.02.07