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1928679 
Journal Article 
In situ REMEDIATION OF SOILS POLLUTED WITH HEAVY METALS. PART II. USING OF ELECTROKINETIC TREATMENT 
Dragut, L; Bogatu, C; Verbitchi, V; Ionescu, D; Harjan, I; Masu, S 
2009 
Yes 
Journal of Environmental Protection and Ecology
ISSN: 1311-5065 
10 
1 
49-55 
English 
WOS:000265259400007 
Electrokinetic treatment is used for separation and
concentration of heavy metals, radioactive elements, organic compounds, from polluted soils,
sediments and sludges. A literature review concerning its principal aspects, is presented. When
an electric field is applied between electrodes placed in soil, ions movement takes place due to
electromigration, electroosmosis and electrophoresis processes. As a result of water
electrolysis, two pH fronts are produced, alkaline - at cathode and acid - at anode. Both fronts
are moving towards electrodes with opposite charge, and when they meet each other, there is an pH
jump which is placed near cathode zone. Time for electrokinetic remediation depends on transport
rate, distance between electrodes, and their configuration. For separation of zinc and manganese
from a soil sample placed in a hydraulic flux of about 1 cm(3)/min, and 100, 150, 200 V, maximum
yield for manganese and zinc extraction was 72%, at 200 V. By using acetic acid and EDTA for pH
control in electrodes chambers, the removal of nickel was 73% and of cadmium 94%. 
heavy metals; electroremediation; pH gradient; ions migration