一定印加電圧下での動電学的土壌浄化におけるカドミウムの濃度分布

概要

論文の詳細を見る
Restoration of contaminated soils to an environmentally acceptable condition is important. Various methods currently used have advantages and limitations in remediating contaminants in soils. In fact, most successful in situ remediation technologies are restricted to soils with relatively high hydraulic conductivity and can not be used for fine-grained deposits. One of the newer techniques in soil remediation is a method based on electrokinetic phenomena in soils. Electrokinetic soil remediation is an effective in situ separation and removal technique used for extraction of heavy metals and some organic compounds from fine-grained soils. The technology uses electricity to affect chemical concentrations and water flow through the pores of soils. In the present study, the distributions of cadmium in the electrokinetic processing of kaolinite under the condition of constant applied voltage are predicted using a theoretical model that incorporates equilibrium chemistry and the results are compared with experimental findings. The results obtained in this study are summarized as follows: The distributions of pH and cadmium simulated by the model show relatively good agreement with experimental results. The steepness of the pH jump and its influence on the distribution of cadmium are clearly seen. Cadmium accumulates in the region of the pH jump to the cathode. As a consequence of the focussing of cadmium in the region of the pH jump to the cathode, the decrease in the volume of soil to excavate from the site is advantageous. From experiments, it was also found that the progress of electrokinetic processing of cadmium could be grasped to a certain extent by monitoring the local voltage and the current density.
社団法人資源・素材学会の論文
2000-10-25

一定印加電圧下での動電学的土壌浄化におけるカドミウムの濃度分布

スポンサーリンク

概要

著者

関連論文

スポンサーリンク

一定印加電圧下での動電学的土壌浄化における カドミウムの濃度分布

スポンサーリンク

概要

著者

関連論文

スポンサーリンク

一定印加電圧下での動電学的土壌浄化におけるカドミウムの濃度分布