Can electrochemistry enhance the removal of organic pollutants by phytoremediation?

JOURNAL OF ENVIRONMENTAL MANAGEMENT

卷:225

Article

Sanchez, Virtudes¹  Javier Lopez-Bellido, Francisco²  Canizares, Pablo³  Rodrigueza, Luis¹ 

[1] Univ Castilla La Mancha, Dept Chem Engn, Sch Civil Engn, Ave Camilo Jose Cela S-N, E-13071 Ciudad Real, Spain

[2] Univ Castilla La Mancha, Dept Plant Prod & Agr Technol, Sch Agr Engn, Ronda de Calatrava S-N, Ciudad Real 13003, Spain

[3] Univ Castilla La Mancha, Dept Chem Engn, Fac Chem Sci & Technol, Ave Camila Jose Cela 10, E-13071 Ciudad Real, Spain

关键词: Atrazine;    Maize;    Electrokinetic-assisted phytoremediation;    Polluted soils;   

DOI  :  10.1016/j.jenvman.2018.07.086

来源: Elsevier

【 摘 要 】

An electrokinetic-assisted phytoremediation test using maize (Zea mays L.) was conducted in order to assess the role of the electric field on the enhancement of plant uptake and degradation of the moderate polar pesticide atrazine in spiked soils. Twelve different treatments, including two different initial atrazine soil doses (5 and 10 mg kg(-1)) and two different values of the electric field applied (2 and 4 V cm(-1)), together with the corresponding control treatments without plants and/or without electric current, were tested. The application of an electric field during a period of 4 h a day and with periodical polarity inversion (each 2 h) did not caused significant changes in soil pH; moreover, maize plants increased the buffering capacity of the soil. The application of an electric field of 2 V cm(-1) led to a slight decrease on maize biomass while the accumulation of atrazine and its main metabolites in plant tissues was significantly enhanced. On the overall, the yield of atrazine removal by electrokinetic-assisted phytoremediation with maize was increased up to 36.5% with respect to the phytoremediation process without electricity. On our knowledge, this work is the first one specifically focused on the removal of organic pollutants from soils by using the combination of phytoremediation and electrokinetic remediation.

【 授权许可】

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