The Sorption Characteristics Of PAHs Onto Soils
In The Presence Of Synthetic And Bio Surfactant
Author(s)
J.-H. Chang, Z. Qiang & C.-P. Huang
Abstract
Contaminants such as polycyclic aromatic hydrocarbons (PAHs) are of special
concern due to their high toxicities and hydrophobicities. The high hydrophobic
natures of PAHs enable their strong sorption onto soil or sediments, which
makes it difficult for their removal from the environment. This study was to
explore the sorption characteristics of PAHs with synthetic nonionic surfactant
and biosurfactant in the soil. Two surfactants (one synthetic and one naturally
occurring) Triton X-100 and rhamnolipid were used. Results show that the
partition coefficient of PAHs in the Triton X-100 system decreases with
increasing surfactant concentrations. Throughout the whole concentration range
of studied biosurfactant (0 ~ 30 CMC), the partition coefficient of PAHs in
rhamnolipid system is roughly constant, around 400.0 L/Kg.
Keywords: sorption, soils, PAHs, surfactant, biosurfactant.
1 Introduction
The polycyclic aromatic hydrocarbons (PAHs) are of special concern for the
natural environment due to their high toxicities and hydrophobicities. On the
basis of the characteristic of high hydrophobicity, PAHs are strongly sorbed onto
soil or sediments [1]. As such, it is difficult to remove PAHs from the soils.
Among many remediation techniques, surfactants have been induced in soil-
Keywords
sorption, soils, PAHs, surfactant, biosurfactant.
Related Book
Other papers in this volume
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