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Influence of anolyte and catholyte composition on TPHs removal from low permeability soil by electrokinetic reclamation

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Title: Influence of anolyte and catholyte composition on TPHs removal from low permeability soil by electrokinetic reclamation
Authors: Murillo-Rivera, B.1, Labastida, I.1, Barrón, J.1, Oropeza-Guzman, M.T.2 oropeza1@yahoo.com, González, I.1, Teutli-Leon, M.M.M.3
Source: Electrochimica Acta. Feb2009, Vol. 54 Issue 7, p2119-2124. 6p.
Subjects: Electrolytes, Solution (Chemistry), Soil permeability, Electrokinetics, Hydrocarbons, Soil pollution, Electric fields
Abstract: Abstract: Removal of TPHs from polluted soil by electrokientic reclamation was done by using different electrolytes (anolyte and catholyte). The initial concentration of TPHs in soil was 23,000ppm and removal efficiencies reached almost 90% for a combination of 0.04M NaOH and 0.1M Na2SO4 in the anode and cathode chambers, respectively. Electroosmotic flow and TPHs desorption were measured under galvanostatic conditions (1.95mAcm−2 and electric field <10Vcm−1). The study is supported on the electrokinetic transport model for low permeability soils. Electrolytes (anolyte and catholyte) were maintained at constant ionic composition to keep constant boundary conditions, thus launch a pseudostationary state for fluid and charge transport throughout the soil. It was also observed that electrolyte concentration favored TPHs desorption as well as their transport throughout the soil by electroosmotic flow from anode to cathode. Both, electrolytes concentration and wetting solution helped to maintain a constant pH profile during electroreclamation, thus a sustained fluid flow from anode to cathode. [Copyright &y& Elsevier]
Copyright of Electrochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Influence of anolyte and catholyte composition on TPHs removal from low permeability soil by electrokinetic reclamation
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  Data: Abstract: Removal of TPHs from polluted soil by electrokientic reclamation was done by using different electrolytes (anolyte and catholyte). The initial concentration of TPHs in soil was 23,000ppm and removal efficiencies reached almost 90% for a combination of 0.04M NaOH and 0.1M Na2SO4 in the anode and cathode chambers, respectively. Electroosmotic flow and TPHs desorption were measured under galvanostatic conditions (1.95mAcm−2 and electric field &lt;10Vcm−1). The study is supported on the electrokinetic transport model for low permeability soils. Electrolytes (anolyte and catholyte) were maintained at constant ionic composition to keep constant boundary conditions, thus launch a pseudostationary state for fluid and charge transport throughout the soil. It was also observed that electrolyte concentration favored TPHs desorption as well as their transport throughout the soil by electroosmotic flow from anode to cathode. Both, electrolytes concentration and wetting solution helped to maintain a constant pH profile during electroreclamation, thus a sustained fluid flow from anode to cathode. [Copyright &amp;y&amp; Elsevier]
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  Data: &lt;i&gt;Copyright of Electrochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.electacta.2008.09.054
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Solution (Chemistry)
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      – SubjectFull: Soil permeability
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      – SubjectFull: Electrokinetics
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      – SubjectFull: Electric fields
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              Text: Feb2009
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