Fate of linear alkylbenzene sulfonate in the Mississippi River

Article Abstract:

The occurrence and fate of linear alkylbenzene sulfonate (LAS) in the 2,800-km. span of the Mississippi River between Minneapolis, MN, and New Orleans, LA, was studied. LAS is a common anionic surfactant in municipal sewage effluents. A sampling of river water and bottom sediment revealed the presence of LAS on all bottom sediments at concentrations between 0.01 and 20 mg/kg. It was also found in 21% of the water samples at concentrations ranging from 0.1 to 28.2 ug/L, indicating that LAS is a common contaminant in bottom sediments of the Mississippi River and that it is present mainly downstream from the sewage outfalls of major cities in dissolved form.

Alkylbenzene Sulfonates NEC, Mississippi River, River sediments

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Fate of alkylbenzenesulfonates and dialkyltetralinsulfonates in sewage-contaminated groundwater

Article Abstract:

Linear alkylbenzene sulfonate (LAS) surfactants have been used in detergents and discharged into the environment to such a great extent that much attention is focused on LAS in sewage and groundwater. A study at the US Geological Survey Cape Cod Toxic Waste Research Site used high-performance liquid chromatography with fluorescence detection and fast atom bombardment spectrometry. Removal of LAS from sewage was measured at 96%, with another 3% removed infiltration. The resulting groundwater LAS levels were undetectable with this method.

Land, mineral, wildlife conservation, Sewerage systems, Water, Underground, Groundwater, Contamination, Detergents, Synthetic, Detergents, Sewage disposal

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Fate and transport of linear alkylbenzenesulfonate in a sewage-contaminated aquifer: a comparison of natural-gradient pulsed tracer test

Article Abstract:

The degradation behavior of linear alkylbenzenesulfonate surfactant in both oxic and a moderately aerobic, sewage-contaminated zone showed the surfactant degrading better in the sewage-contaminated zone, as seen in a 20% loss of surfactant mass. This is attributed to biodegradation which preferentially removed the longer alkyl chain homologues and external isomers.

Surface Active Agents, Biodegradation, Sewage

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