The neutral oil in commercial linear alkylbenzenesulfonate and its effect on organic solute solubility in water
- Geological Survey, Denver, CO (United States)
Apparent water solubilities of 1,1-bis(p-chlorophenyl)-2,2,2-trichloroethane (DDT), 2,4,5,2{prime},5{prime}-pentachlorobiphenyl (PCB), and 1,2,3-trichlorobenzene (TCB) were determined at room temperature in aqueous solutions of commercial linear alkylbenzenesulfonate (LAS), oil-free (solvent-extracted) LAS, and single-molecular 4-dodecyl-benzenesulfonate. The extent of solute solubility enhancement by commercial LAS is markedly greater than that by other ionic surfactants below the measured critical micelle concentration (CMC); above the CMC, the enhancement data with LAS are comparable with other surfactants as micelles. The small amount of neutral oils in commercial LAS (1.7%), comprising linear alkyl-benzenes (LABs) and bis(alkylphenyl) sulfones, contributes significantly to the enhanced solubility of DDT and PCB below the CMC; the effect is ascribed to formation of oil-surfactant emulsions. The oil-surfactant emulsion formed corresponds to {approximately}9-10% of the commercial LAS below the CMC. The data suggest that discharge of wastewater containing a significant level of oils and surface-active agents could lead to potential mobilization of organic pollutants and LABs in aquatic environments.
- OSTI ID:
- 5217840
- Journal Information:
- Environmental Science and Technology; (United States), Journal Name: Environmental Science and Technology; (United States) Vol. 25:4; ISSN ESTHA; ISSN 0013-936X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
ALKYLATED AROMATICS
AQUEOUS SOLUTIONS
AROMATICS
CHEMICAL ANALYSIS
CHLORINATED AROMATIC HYDROCARBONS
CHROMATOGRAPHY
COLLOIDS
DATA
DDT
DISPERSIONS
EMULSIONS
ENVIRONMENTAL TRANSPORT
EXPERIMENTAL DATA
GAS CHROMATOGRAPHY
GRAVIMETRIC ANALYSIS
HALOGENATED AROMATIC HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
INSECTICIDES
LIQUID WASTES
MASS TRANSFER
MIXTURES
NUMERICAL DATA
OILS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PESTICIDES
QUANTITATIVE CHEMICAL ANALYSIS
SEPARATION PROCESSES
SOLUBILITY
SOLUTIONS
SULFONATES
SURFACE PROPERTIES
SURFACE TENSION
SURFACTANTS
WASTE WATER
WASTES
WATER
WATER TREATMENT