Partitioning of 2,2',4,4'-tetrachlorobiphenyl by the dissolved organic matter in oxic and anoxic porewaters

Article Abstract:

Aeration of anoxic porewater increased the partitioning of 2,2',4,4'-tetrachlorobiphenyl by the dissolved organic matter (DOM) in oxic and anoxic porewaters. This was gleaned from a comparison of the solubility enhancement and the porewater dissolved organic matter partition coefficient of 2,2',4,4'-tetrachlorobiphenyl in samples of anoxic porewater and the same porewater after aeration from Brandywine River in Chadds Ford, PA. Results also showed that oxic porewaters had greater solubility enhancement and DOM partition coefficient of up to an order of magnitude larger than anoxic porewaters.

Analysis, Organic compounds, River sediments, Biphenyl compounds, Biphenyls (Class of compounds)

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Partitioning of polynuclear aromatic hydrocarbons between sediments from San Francisco Bay and their porewaters

Article Abstract:

The distributions of 16 polynuclear aromatic hydrocarbons (PAHs) in sediments of San Francisco Bay and their porewaters (PW) were determined by fractionation and biochemical techniques. Measurements of total PAHs obtained on the basis of organic carbon content varied widely in marsh sediments and their PW. There were also significant differences in sediment-PW coefficients between wet and dry seasons and high to low intertidal zones, indicating variations in the partitioning of PAHs between sediments and their PW.

Measurement, Environmental aspects, Polycyclic aromatic hydrocarbons, Sediments (Geology)

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Aroclor 1268 and toxaphene in fish from a southeastern U.S. estuary

Article Abstract:

An examination of fish and crustacean samples from two locations in the Turtle/Brunswick River Estuary showed that PCB concentrations were highest in the heavily contaminated salt marsh in the upper estuary and that the high levels of PCB in the fish tissue samples were generated through the food chain. Characterization of the PCB identified the toxins as Aroclor 1268, as well as toxaphene.

Industrial Organic Chemicals, Polychlorinated Biphenyls, Cyclic Crude and Intermediate Manufacturing, Research, Environmental sciences, Food chains (Ecology), Food chains, Estuarine ecology, Estuarine ecosystems

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