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Partitioning of polycyclic aromatic hydrocarbons to solid-sorbed nonionic surfactants
1Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310028, China. zlz@zju.edu.cn
Environmental Pollution (Barking, Essex : 1987)
|June 23, 2007
Summary
This study reveals how hydrophobic organic compounds (HOCs) partition into solid-sorbed surfactants. A model was developed to predict HOC distribution in surfactant systems, aiding in environmental remediation strategies.
Area of Science:
- Environmental Chemistry
- Physical Chemistry
- Colloid and Surface Chemistry
Background:
- Hydrophobic organic compounds (HOCs) distribution in solid-water-surfactant systems is critical for environmental fate and remediation.
- Understanding the role of solid-sorbed surfactants in HOC partitioning is essential for accurate environmental modeling.
Purpose of the Study:
- To investigate the partition coefficients of polycyclic aromatic hydrocarbons (PAHs) into solid-sorbed surfactants.
- To develop a predictive model for HOC distribution in solid-water-surfactant systems.
- To assess the practical implications for surfactant-enhanced remediation technologies.
Main Methods:
- Experimental determination of partition coefficients (Ksm) of PAHs into surfactants sorbed onto solids.
- Analysis of the relationship between surfactant sorption amount and Ksm.
- Correlation of Ksm with partition coefficients to surfactant micelles in solution (Kmc).
Main Results:
- Partition coefficients (Ksm) increased with increasing surfactant sorption, reaching a stable maximum (Km sm) at surfactant saturation.
- A linear relationship was observed between fitted Km sm values and Kmc for various PAHs and surfactants.
- A model was successfully developed to describe and predict PAH distribution in these systems.
Conclusions:
- Solid-sorbed surfactants significantly influence HOC partitioning, with a maximum effect at surfactant saturation.
- The developed model provides a valuable tool for predicting HOC behavior in complex environmental matrices.
- Findings support the advancement of effective and safe surfactant-enhanced remediation techniques for contaminated sites.
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