Species Distribution of Heavy Metals in Enhanced Electrokinetic Removal Process
In this study, in order to evaluate the migration of heavy metals in enhanced electrokinetic removal，visual minteq was adopted to calculate the species distribution of heavy metals in different pH. Most of the heavy metals except arsenic generated the enrichment near the cathode area. Arsenate always existed as anion such as AsO43-、H2AsO4-、HAsO42-. Near the alkaline area ,the main form of heavy metals were alkali metal hydroxides and seriously restricted the migration and removal of heavy metals. The addition of potassium tetroxalate did not change the species distribution of heavy metals obviously.The nitric acid was more efficient than potassium tetroxalate to condition enhanced electrokinetic removal. Nevertheless ,both of two enhancement still need to be impoved to promote the removal efficiency.
Dongye Sun, Wen-Pei Sung and Ran Chen
Z. H. Xu et al., "Species Distribution of Heavy Metals in Enhanced Electrokinetic Removal Process", Applied Mechanics and Materials, Vols. 71-78, pp. 910-913, 2011