Removal of phenol from contaminated kaolin using electrokinetically enhanced in situ chemical oxidation.
The application of electrokinetic treatment to phenol contaminated soil combined with the addition of a chemical oxidant (permanganate) to the catholyte has been evaluated. It was found that the counter-current flow of the phenol (by electrosmosis) and permanganate (by electromigration) leads to a rapid oxidation of the phenol in the soil. After 5 days of treatment over 90% of the phenol (initial concentration 1 g kg(-1) dry soil) in a 15 cm long container of kaolin was removed by electrokinetic treatment with a voltage gradient of 1 V cm(-1) and an initial concentration of KMnO4 of 9 g L(-1) in the catholyte. This level of treatment was achieved with an electrical energy consumption of less than 15 kWh per m3 of soil treated.
Thepsithar
Prapisala
P
School of Chemical Engineering and Analytical Science, University of Manchester, UK.
Roberts
Edward P L
EP
D004563:Electrochemistry; D007616:Kaolin; D007700:Kinetics; D008345:Manganese / Q000032:analysis; D016877:Oxidants / Q000737:chemistry*; D010084:Oxidation-Reduction; D019800:Phenol / Q000737:chemistry / Q000302:isolation & purification*; D011196:Potassium Permanganate / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry / Q000302:isolation & purification*; D018505:Waste Management / Q000379:methods*
D016877:Oxidants; D012989:Soil Pollutants; D011196:Potassium Permanganate; D007616:Kaolin; D019800:Phenol; D008345:Manganese