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Soil moisture could enhance electrokinetic remediation of arsenic-contaminated soil

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Abstract

Electrokinetic remediation (EKR) is the most efficient technique for remediation of fine-grained soil. The primary removal mechanisms of heavy metal in EKR are the electromigration and electroosmosis flow under appropriate electric gradients. Most EKR studies have researched the variation according to the electrolyte and electric voltage. Also, EKR could be influenced by the migration velocity of ions, while few studies have investigated the effect of moisture content. In this study, soil moisture was controlled by using tap water and NaOH as electrolytes to enhance electromigration and electroosmosis flow. In both electrolytes, the higher moisture content led to the more As removal efficiency, but there were no differences between tap water and NaOH. Therefore, tap water was the most cost-effective electrolyte to remove As from fine-grained soil.

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Acknowledgements

This work was supported by KEITI through GAIA project (2016000550001) and partially funded by National Research Foundation of Korea (2015R1D1A1A09060537).

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Authors and Affiliations

  1. Department of Environmental Engineering and Soil Environment Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonbuk, 54896, Republic of Korea

    Su-Yeon Shin, Sang-Min Park & Kitae Baek

  2. Department of Bioactive Material Sciences, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonbuk, 54896, Republic of Korea

    Kitae Baek

Authors
  1. Su-Yeon Shin
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  2. Sang-Min Park
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  3. Kitae Baek
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Correspondence to Kitae Baek.

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Responsible editor: Zhihong Xu

Su-Yeon Shin and Sang-Min Park contributed equally to this work.

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Shin, SY., Park, SM. & Baek, K. Soil moisture could enhance electrokinetic remediation of arsenic-contaminated soil. Environ Sci Pollut Res 24, 9820–9825 (2017). https://doi.org/10.1007/s11356-017-8720-3

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  • DOI: https://doi.org/10.1007/s11356-017-8720-3

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