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Non-Ionic Surfactant Recovery in Surfactant Enhancement Aquifer Remediation Effluent with Chlorobenzenes by Semivolatile Chlorinated Organic Compounds Volatilization

Author

Listed:
  • Patricia Sáez

    (Chemical Engineering and Materials Department, Complutense University of Madrid, 28040 Madrid, Spain)

  • Aurora Santos

    (Chemical Engineering and Materials Department, Complutense University of Madrid, 28040 Madrid, Spain)

  • Raúl García-Cervilla

    (Chemical Engineering and Materials Department, Complutense University of Madrid, 28040 Madrid, Spain)

  • Arturo Romero

    (Chemical Engineering and Materials Department, Complutense University of Madrid, 28040 Madrid, Spain)

  • David Lorenzo

    (Chemical Engineering and Materials Department, Complutense University of Madrid, 28040 Madrid, Spain)

Abstract

Surfactant enhanced aquifer remediation is a common treatment to remediate polluted sites with the inconvenience that the effluent generated must be treated. In this work, a complex mixture of chlorobenzene and dichlorobenzenes in a non-ionic surfactant emulsion has been carried out by volatilization. Since this techhnique is strongly affected by the presence of the surfactant, modifying the vapour pressure, P v 0 , and activity coefficient, γ , a correlation between P v j 0 γ j and surfactant concentration and temperature was proposed for each compound, employing the Surface Response Methodology (RSM). Volatilization experiments were carried out at different temperatures and gas flow rates. A good agreement between experimental and predicted remaining SVCOCs during the air stripping process was obtained, validating the thermodynamic parameters obtained with RSM. Regarding the results of volatilization, at 60 °C 80% of SVCOCs were removed after 6 h, and the surfactant capacity was almost completely recovered so the solution can be recycled in soil flushing.

Suggested Citation

  • Patricia Sáez & Aurora Santos & Raúl García-Cervilla & Arturo Romero & David Lorenzo, 2022. "Non-Ionic Surfactant Recovery in Surfactant Enhancement Aquifer Remediation Effluent with Chlorobenzenes by Semivolatile Chlorinated Organic Compounds Volatilization," IJERPH, MDPI, vol. 19(12), pages 1-12, June.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:12:p:7547-:d:843382
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    References listed on IDEAS

    as
    1. Raúl García-Cervilla & Arturo Romero & Aurora Santos & David Lorenzo, 2020. "Surfactant-Enhanced Solubilization of Chlorinated Organic Compounds Contained in DNAPL from Lindane Waste: Effect of Surfactant Type and pH," IJERPH, MDPI, vol. 17(12), pages 1-14, June.
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