The role of surfactant-soil interactions for the mobility of organic compounds with high hydrophobicity
Surfactants at concentrations below their critical micelar concentration (CMC) have shown to facilitate unwanted transport of pesticides and other organic chemicals, through the soil to groundwater. The anionic surfactant dodecylsulphate solubilizes hydrophobic compounds e.g. hexachlorobenzene, on soils by lowering of apparent soil/water distribution coefficient (K(d)(*)). Below CMC, at environmentally relevant surfactant concentrations, K(d)(*) was reduced by a factor of 1 to 13 for sandy and sandy loam loam soils. For these soils a 4 phase distribution model developed for the water solubility enhancements of hydrophobic compounds by surfactants.
Bibliographic Reference: Paper presented: COST Action 66 - Working Group Meeting: Sorption and Mobility, Sevilla (ES), February 15-16, 1996
Availability: Available from (1) as paper EN 39644 ORA
Record Number: 199711071 / Last updated on: 1997-09-16
Original language: en
Available languages: en