title: Removal of MTBE from a clay soil using electrokinetic technique.
abstract: Remediation of a soil contaminated with methyl tertiary butyl ether (MTBE) was studied by using the electrokinetic technique. A series of experimental tests were carried out on contaminated soil in an electro-osmotic apparatus at different applied gradients of voltage and time. The tests were conducted with distilled water and ethylenediaminetetra acetic acid (EDTA) solution as electrolyte. During each test the values of pH at anode and cathode reservoirs and also the discharge from cathode were measured. At the end of each test a number of soil samples were extracted from the middle of the soil at different distances from the anode and the removal of contaminant was measured by a gas chromatography apparatus. The results indicate that with EDTA as electrolyte the highest efficiency for removal of MTBE is achieved with 2.0 V/cm gradient and in the duration of 14 days. In addition, EDTA causes the values of pH to increase and decrease in the cathode and anode reservoirs, respectively. It also decreases the effluent and electro-osmotic permeability in comparison with distilled water. Experimental data were analysed by ANOVA and t-test methods. These statistical analyses showed significant difference (at 5% level) between the reference and other tests.
authors.affiliation: a Faculty of Soil and Water Engineering , University of Tehran , Karaj , Iran.
authors.forename: A R
authors.initials: AR
authors.lastname: Estabragh
authors.affiliation: a Faculty of Soil and Water Engineering , University of Tehran , Karaj , Iran.
authors.forename: A T
authors.initials: AT
authors.lastname: Bordbar
authors.affiliation: b Faculty of Agricultural , University of Tehran , Karaj , Iran.
authors.forename: F
authors.initials: F
authors.lastname: Ghaziani
authors.affiliation: c Computational Geomechanics Group, College of Engineering, Mathematics and Physical Sciences , University of Exeter , Devon , UK.
authors.forename: A A
authors.initials: AA
authors.lastname: Javadi
mesh_terms: D000538:Aluminum Silicates / Q000737:chemistry*; D000077215:Clay; D055664:Electrochemical Techniques; D052918:Environmental Restoration and Remediation / Q000379:methods*; D008738:Methyl Ethers / Q000032:analysis / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry*
chemical_list: D000538:Aluminum Silicates; D008738:Methyl Ethers; D012987:Soil; D012989:Soil Pollutants; C043243:methyl tert-butyl ether; D000077215:Clay
keywords: ANOVA; EDTA; Electrokinetic; MTBE; remediation; t-test