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.

journal_name

Chemosphere

journal_title

Chemosphere

authors

Mena E,Villaseñor J,Cañizares P,Rodrigo MA

doi

10.1016/j.chemosphere.2015.12.053

subject

Has Abstract

pub_date

2016-03-01 00:00:00

pages

300-7

eissn

0045-6535

issn

1879-1298

pii

S0045-6535(15)30507-5

journal_volume

146

pub_type

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