Sediment- and saturated-soil-associated reactions involving an anionic surfactant (dodecylsulfate). 1. Precipitation and micelle formation
In assessing the possible removal of contaminants from soils or sediments by surfactant solutions, the need also arises to elucidate interactions between the surfactants and the components of soils and sediments. Interactions of the anionic surfactant dodecylsulfate (DS) with soil and sediment (medium) components were examined at DS concentrations in the range of the critical micelle concentration (cmc). Experiments involving either the variation in DS (0.1-40 mM) or in medium concentration (0.04-0.36 g/mL for six media) demonstrate the importance of precipitation, micellization, and micellar counterion binding in determining the recovery of aqueous DS from medium slurries. Mechanistic and semiempirical mass action equations, and their associated constants, describing these phenomena in well-defined solutions, along with the necessary material balance equations, permit the calculation of precipitation boundaries. Calculated precipitation boundaries were compared to experimental results. These equations also allow the calculation of the aqueous micelle and monomer DS concentrations. A similar methodology to calculate the aqueous micelle concentration was applied in the subsequent study to quantitatively assess the distribution of PAH compounds among micellar, medium, and dissolved aqueous phases.
- Research Organization:
- Environmental Protection Agency, Athens, GA (United States). Environmental Research Lab.
- OSTI ID:
- 5230742
- Report Number(s):
- PB-91-219071/XAB
- Resource Relation:
- Other Information: Pub. in Environmental Science and Technology, v25 n6 p1031-1038 Jun 91. See also PB91-219089. Prepared in cooperation with Technology Applications, Inc., Athens, GA
- Country of Publication:
- United States
- Language:
- English
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Sediment- and saturated-soil-associated reactions involving an anionic surfactant (dodecylsulfate). 2. Partition of PAH compounds among phases. [Dodecyl sulfate]
Sediment- and saturated-soil-associated reactions involving an anionic surfactant (dodecylsulfate). 2. Partition of PAH compounds among phases
Related Subjects
POLYCYCLIC AROMATIC HYDROCARBONS
MATERIALS RECOVERY
SEDIMENTS
DECONTAMINATION
SOILS
SURFACTANTS
SORPTIVE PROPERTIES
ION EXCHANGE
LAND POLLUTION CONTROL
MICELLAR SYSTEMS
POLLUTION CONTROL
SOIL CHEMISTRY
SOLUBILITY
SORPTION
WATER POLLUTION CONTROL
AROMATICS
CHEMISTRY
CLEANING
CONTROL
HYDROCARBONS
MANAGEMENT
ORGANIC COMPOUNDS
PROCESSING
RECOVERY
SURFACE PROPERTIES
WASTE MANAGEMENT
WASTE PROCESSING
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)
540320 - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)