Abstract
This work studies the effect of treatment period on remediation efficiency in an oxyfluorfen-polluted soil through electro-bioremediation technology. Five lab-scale experimental plants were started up simultaneously, operated under an electric field of 1.0 V cm−1 with a polarity reversal frequency of 2 day−1 and disconnected at different times (2, 4, 6, 11 and 24 weeks); these plants underwent post mortem characterization after their operation period. Various parameters were monitored in the electrolyte wells during the experiments. The obtained results indicate that despite the low reproducibility of pH and conductivity in the wells (not in soil), the main conclusions that can be drawn for the different plants are sound and hence have acceptable reproducibility. Polarity reversal allowed suitable conditions for microbial life in terms of pH, but nutrients were also depleted in the soil, which leads to a decrease in the total population of microorganisms during treatment. For treatment periods of less than 10 weeks, there was an appreciable population of microorganisms in the soil, which reached oxyfluorfen removal levels of up to 40%. Longer reaction times were ineffective, and this was related to the much lower concentration of microorganisms. In comparing these results to those obtained in conventional soil bioremediation technology, the application of polarity-reversed electric current led to an increase in the average removal of oxyfluorfen from 0.11 to 0.17 mg kg−1 day−1 but a much higher decrease in the active microorganism population from 88.0 ± 9.0 to 41.0 ± 6.0% of the initial seeded value.
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References
Gavrilescu M (2005) Fate of pesticides in the environment. Eng Life Sci 5:497–526
Chowdhury A, Pradhan S, Saha M, Sanyal N (2008) Impact of pesticides on soil microbiological parameters and possible bioremediation strategies. Indian J Microbiol 48:114–127
Morillo E, Villaverde J (2017) Advanced technologies for the remediation of pesticide-contaminated soils. Sci Total Environ 586:576–597
Spanish Presidential Ministry (2005) Royal Decree 9/2005, of 14 January, which establishes the list of activities that potentially contaminate the soil and criteria and standards for the declaration of polluted soils. Span Off Bull 15:1833–1843 (in spanish)
USEPA United States Environmental Protection Agency (2002) Reregistration eligibility decision (RED) oxyfluorfen, EPA: 738-R-02-014
Sondhia S (2010) Persistence and bioaccumulation of oxyfluorfen residues in onion. Environ Monit Assess 162:163–168
Calderón MJ, Real M, Cabrera A, Koskinen WC, Cornejo J, Hermosín MC (2015) Influence of olive oil mill waste amendment on fate of oxyfluorfen in southern Spain soils. Clean Soil Air Water 43:1107–1113
Tomei MC, Daugulis AJ (2013) Ex situ bioremediation of contaminated soils: an overview of conventional and innovative technologies. Crit Rev Environ Sci Technol 43:2107–2139
Virkutyte J, Sillanpaa M, Latostenmaa P (2002) Electrokinetic soil remediation—critical overview. Sci Total Environ 289:97–121
Rodrigo MA, Oturan N, Oturan MA (2014) Electrochemically assisted remediation of pesticides in soils and water: a review. Chem Rev 114:8720–8745
Yeung AT, Gu YY (2011) A review on techniques to enhance electrochemical remediation of contaminated soils. J Hazard Mater 195:11–29
Wick LY, Shi L, Harms H (2007) Electro-bioremediation of hydrophobic organic soil-contaminants: a review of fundamental interactions. Electrochim Acta 52:3441–3448
Ramírez EM, Camacho JV, Rodrigo MA, Cañizares P (2015) Combination of bioremediation and electrokinetics for the in-situ treatment of diesel polluted soil: a comparison of strategies. Sci Total Environ 533:307–316
Barba S, Villaseñor J, Rodrigo MA, Cañizares P (2017) Effect of the polarity reversal frequency in the electrokinetic-biological remediation of oxyfluorfen polluted soil. Chemosphere 177:120–127
Cameselle C (2014) Electrokinetic remediation, costs estimation. In: Kreysa G, Ota K, Savinell RF (eds) Encyclopedia of applied electrochemistry. Springer, New York, pp 723–725
Moliterni E, Jiménez-Tusset R, Rayo MV, Rodriguez L, Fernández F, Villasenor J (2012) Kinetics of biodegradation of diesel fuel by enriched microbial consortia from polluted soils. Int J Environ Sci Technol 9:749–758
Mena E, Villaseñor J, Cañizares P, Rodrigo MA (2014) Effect of a direct electric current on the activity of a hydrocarbon-degrading microorganism culture used as the flushing liquid in soil remediation processes. Sep Purif Technol 124:217–223
Ruiz C, Mena E, Cañizares P, Villaseñor J, Rodrigo MA (2013) Removal of 2, 4, 6-trichlorophenol from spiked clay soils by electrokinetic soil flushing assisted with granular activated carbon permeable reactive barrier. Ind Eng Chem Res 53:840–846
Mena E, Villaseñor J, Cañizares P, Rodrigo M (2016) Influence of electric field on the remediation of polluted soil using a biobarrier assisted electro-bioremediation process. Electrochim Acta 190:294–304
Mena E, Villaseñor J, Cañizares P, Rodrigo MA (2016) Effect of electric field on the performance of soil electro-bioremediation with a periodic polarity reversal strategy. Chemosphere 146:300–307
Gomes HI, Dias-Ferreira C, Ribeiro AB (2012) Electrokinetic remediation of organochlorines in soil: enhancement techniques and integration with other remediation technologies. Chemosphere 87:1077–1090
Mena E, Barba S, Saez C, Navarro V, Villaseñor J, Rodrigo MA, Cañizares P (2016) Prescale-up of electro-bioremediation processes. In: Yesiller N, Zekkos D, Farid ADA, Reddy KR (eds) Geo-Chicago 2016: sustainable waste management and remediation. American Society of Civil engineers, Reston, VA, pp 264–273
Xu W, Wang C, Liu H, Zhang Z, Sun H (2010) A laboratory feasibility study on a new electrokinetic nutrient injection pattern and bioremediation of phenanthrene in a clayey soil. J Hazard Mater 184:798–804
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Financial support from the Spanish Ministry of Economy, Industry and Competitiveness and European Union through Project CTM2016-76197-R (AEI/FEDER, UE) is gratefully acknowledged. The FPI Grant BES-2014-069662 is also acknowledged.
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Barba, S., Villaseñor, J., Rodrigo, M.A. et al. Can electro-bioremediation of polluted soils perform as a self-sustainable process?. J Appl Electrochem 48, 579–588 (2018). https://doi.org/10.1007/s10800-018-1172-8
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DOI: https://doi.org/10.1007/s10800-018-1172-8