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  11. Recognizing Functional Groups Of Mes/apg Mixed Surfactants For Enhanced Solubilization Toward Benzo[a]pyrene.
  1. Home
  3. Research Domains
  5. Environmental Sciences
  7. Soil Sciences
  9. Soil Physics
  11. Recognizing Functional Groups Of Mes/apg Mixed Surfactants For Enhanced Solubilization Toward Benzo[a]pyrene.

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Recognizing Functional Groups of MES/APG Mixed Surfactants for Enhanced Solubilization toward Benzo[a]pyrene.

Liyuan Wu1,2,3, Yaxin Liu1,2,3, Xin Wang4

  • 1Centre for Urban Environmental Remediation, Beijing University of Civil Engineering and Architecture, Beijing 102616, China.

Environmental Science & Technology
|April 4, 2024

View abstract on PubMed

Summary
This summary is machine-generated.

Environmentally friendly surfactants, fatty acid methyl ester sulfonate (MES) and alkyl polyglucoside (APG), effectively solubilize benzo[a]pyrene in soil. This novel approach enhances remediation by forming stable micelles through hydrogen bonding and low polarity interactions.

Area of Science:

  • Environmental Chemistry
  • Soil Science
  • Green Chemistry

Background:

  • Benzo[a]pyrene's high octanol/water partition coefficient hinders soil removal.
  • Mixed surfactants increase solubility but risk secondary contamination, with unclear mechanisms.
  • Developing effective and eco-friendly remediation agents for polycyclic aromatic hydrocarbons (PAHs) is crucial.

Purpose of the Study:

  • To introduce and evaluate a novel approach using fatty acid methyl ester sulfonate (MES) and alkyl polyglucoside (APG) for benzo[a]pyrene solubilization.
  • To elucidate the compounding mechanism of MES and APG in enhancing benzo[a]pyrene solubility.
  • To assess the efficiency of MES/APG mixtures compared to conventional surfactants.

Main Methods:

  • Investigated the solubilization of benzo[a]pyrene using varying ratios of MES and APG.
Keywords:
alkyl polyglucoside (APG)anionic−nonionic mixed surfactantbenzo[a]pyrenefatty acid methyl ester sulfonate (MES)solubilization

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  • Determined apparent solubility (Sw) and molar solubilization ratio (MSR) for benzo[a]pyrene.
  • Analyzed the interaction mechanism between MES and APG using functional group analysis and micelle formation studies.

    • Main Results:

    • The optimal MES/APG ratio of 7:1 at 6 g/L achieved an apparent solubility of 8.58 mg/L and an MSR of 1.31 for benzo[a]pyrene.
    • This performance is comparable to the conventional surfactant Tween 80 (MSR, 0.95).
    • Hydrogen bonding between APG's hydroxyl groups and MES's sulfonic acid group, along with MES's low-polarity ester groups, drives enhanced solubilization.

    Conclusions:

    • A synergistic effect between MES and APG significantly enhances benzo[a]pyrene solubilization.
    • The mechanism involves reduced electrostatic repulsion between MES molecules and favorable interactions with benzo[a]pyrene's structure.
    • This study provides a foundation for selecting eco-friendly surfactants for effective PAH-contaminated soil remediation.