Species Distribution of Heavy Metals in Enhanced Electrokinetic Removal Process

Zhong Hui Xu; Dong Wei Li; Xi Peng

doi:10.4028/www.scientific.net/AMM.71-78.910

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 71-78Species Distribution of Heavy Metals in Enhanced...

Species Distribution of Heavy Metals in Enhanced Electrokinetic Removal Process

Abstract:

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 AsO₄^3-、H₂AsO₄^-、HAsO₄^2-. 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.

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Periodical:

Applied Mechanics and Materials (Volumes 71-78)

Pages:

910-913

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.71-78.910

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Online since:

July 2011

Authors:

Zhong Hui Xu, Dong Wei Li, Xi Peng

Keywords:

Enhanced Electrokinetic Removal, Heavy Metal, Species Distribution, Visual Minteq

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