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• W3018587515 endingPage "126880" @default.
• W3018587515 startingPage "126880" @default.
• W3018587515 abstract "Electro-bioremediation is a promising technology for remediation of soil contaminated with persistent organic compounds such as polycyclic aromatic hydrocarbons (PAHs). During electro-bioremediation, electrical fields have been shown to increase pollutant degradation. However, it remains unclear whether there is an optimal strength for the electrical field applied that is conductive to the maximum role played by microbes. This study aimed to determine the optimal strength of electric field through the analysis of the effects of different voltages on the microbial community and activity. Four bench-scale experiments with voltages of 0, 1, 2 and 3 V cm−1 were conducted for 90 days in an aged PAH-contaminated soil. The spatiotemporal changes of the soil pH, moisture content and temperature, microbial biomass and community structure, and the degradation extent of PAHs were researched over 90 days. The results indicated that the total microbial biomass and degradation activity were highest at voltages of 2 V cm−1. The concentration of total phospholipid fatty acids, used to quantify soil microbial biomass, reached 65.7 nmol g−1 soil, and the mean degradation extent of PAHs was 44.0%. Similarly, the maximum biomass of actinomycetes, bacteria and fungus also occurred at the voltage of 2 V cm−1. The Gram-positive/Gram-negative and (cy17:0+cy 19:0)/(16:1ω7+18:1ω7) ratios also showed that the intensity of electric field and electrode reactions strongly influenced the microbial community structure. Therefore, to optimize the electro-bioremediation of PAH-contaminated soil, the strength of electric field needs to be selected carefully. This work provides reference for the development of novel electrokinetically enhanced bioremediation processes." @default.
• W3018587515 created "2020-05-01" @default.
• W3018587515 creator A5015277898 @default.
• W3018587515 creator A5029708987 @default.
• W3018587515 creator A5039074657 @default.
• W3018587515 creator A5040797890 @default.
• W3018587515 date "2020-09-01" @default.
• W3018587515 modified "2023-10-16" @default.
• W3018587515 title "Changes of microbial community and activity under different electric fields during electro-bioremediation of PAH-contaminated soil" @default.
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• W3018587515 doi "https://doi.org/10.1016/j.chemosphere.2020.126880" @default.
• W3018587515 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32957287" @default.
• W3018587515 hasPublicationYear "2020" @default.
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