Evidence for rapid, nonbiological degradation of tributyltin compounds in autoclaved and heat-treated fine-grained sediments

Article Abstract:

The degradation of tributyltin (TBTX) compounds in fine-grained sediments was studied. Sediment samples were collected from the benthic layer of San Diego Bay in California, Pearl Harbor in Hawaii and Skidaway River in Georgia. The degradation was mainly abiotic and consisted of a two-day rapid degradation stage and a slower five-to-seven-day degradation phase. Monobutyltin was the main degradation product that was generated when dissolved TBTX was combined with the fine-grained sediment. This research may lead to the development of methods for detoxifying anthropogenic compounds in water.

Author: Stang, Peter M., Lee, Richard F., Seligman, Peter F.
Tributyltin, Soil degradation, Decomposition (Chemistry)

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Micellar electrokinetic capillary chromatography method for direct determination of herbicides in Lake Pontchartrain, Louisiana, sediments

Article Abstract:

Micellar electrokinetic capillary chromatography is a useful technique in the separation and quantification of 2,4-D and atrazine levels. The technique relies on analyte partitioning between a micellar pseudostationary phase and aqueous solution. Additionally, the technique uses sodium dodecyl sulfate as the surfactant. An analysis of sediments from Lousiana's Lake Pontchartrain was conducted using the separation technique.

Author: Yu, Ye, Cole, Richard B.
Herbicides, Atrazine

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Bioassay-directed chemical analysis of genotoxic components in coastal sediments

Article Abstract:

A three-level bioassay-directed chemical analysis was used to determine the amount of genotoxic components in marine sediments off the coast of Barcelona, Spain. The research study employed gel permeation chromatography, normal-phase liquid chromatography and reversed-phase liquid chromatography. The samples analyzed revealed 140 aromatic compounds, 57 of which were mutagenic or belonged to mutagenic chemical classes.

Author: Fernandez, Pilar, Grifoll, Magda, Solanas, Anna Maria, Bayona, Josep Maria, Albalges, Joan
Composition, Marine sediments, Chemistry, Analytic, Analytical chemistry, Biological assay, Bioassay, Genetic toxicology, Chromatographic analysis

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Subjects list: Research, Sedimentation analysis, Usage, Chromatography
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