Laboratory experiments and theoretical modelling generally proposed for ele
ctrokinetic soil processing consider isothermal conditions at room temperat
ure. Important increases of the soil temperature, due to the Joule effect,
have been observed during pilot or field-scale tests. The temperature effec
t on the transport of ionic species present in the pore solution is investi
gated when an electric field is applied through the soil mass. Laboratory e
xperiments are run at 20 and 40 degrees C using kaolinite as soil model and
one anion and one cation as model pollutants. An adapted methodology (pH c
ontrol, steady state conditions) allows the measurement and the comparison
of the ionic electrokinetic velocities at the two temperatures. Under the c
onditions developed, the temperature mainly influences the ionic velocities
, which increase, for the two ions of interest, when the temperature rises.
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