title: Effect of electric field on the performance of soil electro-bioremediation with a periodic polarity reversal strategy.
abstract: In this work, it is studied the effect of the electric fields (within the range 0.0-1.5 V cm(-1)) on the performance of electrobioremediation with polarity reversal, using a bench scale plant with diesel-spiked kaolinite with 14-d long tests. Results obtained show that the periodic changes in the polarity of the electric field results in a more efficient treatment as compared with the single electro-bioremediation process, and it does not require the addition of a buffer to keep the pH within a suitable range. The soil heating was not very important and it did not cause a change in the temperature of the soil up to values incompatible with the life of microorganisms. Low values of water transported by the electro-osmosis process were attained with this strategy. After only 14 d of treatment, by using the highest electric field studied in this work (1.5 V cm(-1)), up to 35.40% of the diesel added at the beginning of the test was removed, value much higher than the 10.5% obtained by the single bioremediation technology in the same period.
authors.affiliation: Chemical Engineering Department, Faculty of Chemical Sciences and Technologies, Research Institute for Chemical and Environmental Technology (ITQUIMA), Universidad de Castilla La Mancha, Campus Universitario s/n.13071, Ciudad Real, Spain.
authors.forename: E
authors.initials: E
authors.lastname: Mena
authors.affiliation: Chemical Engineering Department, Faculty of Chemical Sciences and Technologies, Research Institute for Chemical and Environmental Technology (ITQUIMA), Universidad de Castilla La Mancha, Campus Universitario s/n.13071, Ciudad Real, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Villaseñor
authors.affiliation: Chemical Engineering Department, Faculty of Chemical Sciences and Technologies, Research Institute for Chemical and Environmental Technology (ITQUIMA), Universidad de Castilla La Mancha, Campus Universitario s/n.13071, Ciudad Real, Spain.
authors.forename: P
authors.initials: P
authors.lastname: Cañizares
authors.affiliation: Chemical Engineering Department, Faculty of Chemical Sciences and Technologies, Research Institute for Chemical and Environmental Technology (ITQUIMA), Universidad de Castilla La Mancha, Campus Universitario s/n.13071, Ciudad Real, Spain. Electronic address: Manuel.Rodrigo@uclm.es.
authors.forename: M A
authors.initials: MA
authors.lastname: Rodrigo
mesh_terms: D001673:Biodegradation, Environmental; D004560:Electricity; D052918:Environmental Restoration and Remediation / Q000379:methods*; D005742:Gasoline; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism*
chemical_list: D005742:Gasoline; D012989:Soil Pollutants
keywords: Bioremediation; Diesel; Electrobioremediation; Polarity reversal; pH