Development of complex electrokinetic decontamination method for soil contaminated with uranium

2012 ◽  
Vol 86 ◽  
pp. 49-56 ◽  
Author(s):  
Gye-Nam Kim ◽  
Seung-Soo Kim ◽  
Hye-Min Park ◽  
Wan-Suk Kim ◽  
Jei-Kwon Moon ◽  
...  
Keyword(s):  
Electrokinetic Decontamination

Zeta potential of clay minerals and quartz contaminated by heavy metals

2005 ◽  
Vol 42 (5) ◽  
pp. 1280-1289 ◽  
Author(s):  
A Kaya ◽  
Y Yukselen
Keyword(s):  
Heavy Metals ◽  
Zeta Potential ◽  
Metal Ions ◽  
Alkaline Earth ◽  
Alkaline Earth Metals ◽  
Ion Concentration ◽  
Test Results ◽  
Ζ Potential ◽  
Pore Fluid Chemistry ◽  
Electrokinetic Decontamination

Laboratory and in situ test results show that electrokinetic decontamination is a promising subsurface decontamination method. However, it has also been reported that several problems arise, such as reverse flow and pH gradient across the anode and the cathode during the electrokinetic decontamination process. Variation in pH alters the zeta (ζ) potential of soils, which is one of the factors affecting the efficiency of contaminant removal by the electrokinetic method. The magnitude of the ζ potential controls the fluid flow rate, whereas its sign controls the flow direction. However, research on how the ζ potential of soils changes under various chemical conditions is limited. In this paper, the effect of pore-fluid chemistry on the ζ potential of kaolinite, montmorillonite, and quartz powder is determined with NaCl, LiCl, CaCl2·2H2O, MgCl2·6H2O, CuCl2, CoCl2, ZnCl2, AlCl3, and Pb(NO3)2. The test results reveal that the ζ potential of the minerals with alkali and alkaline-earth metals changes according to the diffuse electrical double-layer theory. The hydrolyzable metal ions produce two points of zero charge (PZCs), one of which is that of the soil; and the other, that of hydrolyzable oxide. The ζ potential of minerals with hydrolyzable metal ions becomes increasingly positive and reaches its maximum value at neutral pH. It then decreases and again reaches very negative values at alkaline pH values (pH ∼ 10), depending on ion concentration and the bulk precipitation pH of hydrolyzable metals as hydrolyzable oxides. On the basis of the results of this study, it is recommended that the ζ potential of the soils be determined before electrokinetic decontamination.Key words: alkaline-earth metals, electrokinetic decontamination, heavy metals, zeta potential.

Electrokinetic decontamination of soils

1991 ◽  
Vol 28 (1-2) ◽  
pp. 208-209
Author(s):  
GeraldR. Eykholt ◽  
DavidE. Daniel
Keyword(s):  
Electrokinetic Decontamination

scholarly journals WASHING-ELECTROKINETIC DECONTAMINATION FOR CONCRETE CONTAMINATED WITH COBALT AND CESIUM

2009 ◽  
Vol 41 (8) ◽  
pp. 1079-1086 ◽  
Author(s):  
Gye-Nam Kim ◽  
Byeong-Il Yang ◽  
Wang-Kyu Choi ◽  
Kune-Woo Lee ◽  
Jay-Hyeok Hyeon
Keyword(s):  
Electrokinetic Decontamination

Removal of uranium from contaminated soil using indoor electrokinetic decontamination

2016 ◽  
Vol 309 (3) ◽  
pp. 1175-1181 ◽  
Author(s):  
Gye-Nam Kim ◽  
Ilgook Kim ◽  
Seung-Soo Kim ◽  
Jong-Won Choi
Keyword(s):  
Contaminated Soil ◽  
Electrokinetic Decontamination
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