Electrokinetic remediation is a new remediation technology [26], which is mainly applying voltage at
the two sides of soil and then forming electric field gradient. The pollutant was carried to two poles
treatment room via electromigration, electroosmotic flow or electrophoresis and then treated further [27, 28].
It is suitable for low permeable soil, and has advantages of easily install and operate, low cost [29, 30] and
not destroy the original nature environment [31-33], so can achieve the environmental remediation and
protect the original ecotope [34]. However, the direct electrokinetic remediation can not control the pH
value of soil system well, and the treatment efficiency was almost low. The main improved methods
include adding buffer solution in cathode and anode to control pH value, using ion exchange membrane to
control pH value, adding complexant to improve migration, etc. [35]. Besides, there is combing other
methods to remove the heavy metals, such as electrokinetic remediation combined with iron PRB [36],
electrokinetic-oxidation/reduction combined remediation [37], and electrokinetic-microbe combined
remediation [38].
Electrokinetic remediation is a new remediation technology [26], which is mainly applying voltage atthe two sides of soil and then forming electric field gradient. The pollutant was carried to two polestreatment room via electromigration, electroosmotic flow or electrophoresis and then treated further [27, 28].It is suitable for low permeable soil, and has advantages of easily install and operate, low cost [29, 30] andnot destroy the original nature environment [31-33], so can achieve the environmental remediation andprotect the original ecotope [34]. However, the direct electrokinetic remediation can not control the pHvalue of soil system well, and the treatment efficiency was almost low. The main improved methodsinclude adding buffer solution in cathode and anode to control pH value, using ion exchange membrane tocontrol pH value, adding complexant to improve migration, etc. [35]. Besides, there is combing othermethods to remove the heavy metals, such as electrokinetic remediation combined with iron PRB [36],electrokinetic-oxidation/reduction combined remediation [37], and electrokinetic-microbe combinedremediation [38].
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