Volatilization of Organotin Compounds from Estuarine and Coastal Environments

Article Abstract:

Volatile tin compounds enter sediments and water, originating from the leaching of anti-fouling paints. This study examines occurrence and speciation of tin analytes in Arcachon Harbor, France and Scheldt Estuary, Belgium-Netherlands.Tributyltin contamination is considered a critical ecotoxicological problem. The method includes cryogenic trapping of gaseous species, gas chromatography and plasma-mass spectrometry. Results infer that biological processes may cause remobilization of the tin species. Fluxes were calculated to quantify the dynamic from sediment to water to atmosphere. While good regulation can reduce one source of tin contamination, the second source, tin in the sediments before regulation requires attention.

Paints & Allied Products, Paint and Coating Manufacturing, All Other Basic Inorganic Chemical Manufacturing, Paints and allied products, Industrial inorganic chemicals, not elsewhere classified, Paint Additives, Tin Compounds NEC, Organotin Compounds, Coatings, Paints, Specialty chemicals industry, Marine sediments, Paint industry, Tin industry, Estuarine sediments, Tributyltin, Tin compounds, Amouroux, David, Tessier, Emmanuel, Donard, Olivier F.X., University de Pau

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Effect of Dechlorinating Bacteria on the Longevity and Composition of PCE-Containing Nonaqueous Phase Liquids under Equilibrium Dissolution Conditions

Article Abstract:

Tetrachloroethene[PCE] is a very common contaminant of ground water because of limited solubility in water. Pump and treat methods do not work because the organic solvents that contain PCE are heavier than water. In this experiment dechlorinating microorganisms in a NAPL solution containing PCE achieved total chlorinated ethene removal in 13 days.

Subsidiary-to-parent activities, Chlorinated Solvents, Vinyl Chloride Monomer, Dechlorination, Bacteria, Microorganisms, Rice University

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Influence of Eutrophication on Air-Water Exchange, Vertical Fluxes, and Phytoplankton Concentrations of Persistent Organic Pollutants

Article Abstract:

The relationship between eutrophication and polychlorinated biphenyl[PCB] contamination in deep water is an unknown phenomenon. In this study a dynamic between the two processes was discovered--PCB contamination control does not reduce water-column PCB, and when eutrophication is reduced, PCB concentrations in fish and plankton will plateau and may even rise. This finding results from an examination of air-water exchange, vertical sinking flux and phytoplankton concentrations of PCB. A key discovery is the atmospheric role in supporting PCB concentrations. Implications of this study are that water quality management must be multi-disciplinary and that environmental policies in regard to bodies of water such as Lake Ontario need change.

Polychlorinated Biphenyls, Cyclic Crude and Intermediate Manufacturing, Methods, Management, Bioremediation, Eutrophication, Interdisciplinary research, Dachs, Jordi, Eisenreich, Steven J., Hoff, Raymond M., Rutgers University, Joint Center for Earth Systems Technology

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