Organic speciation of silver in marine waters
Article Abstract:
The competitive ligand equilibration/solvent extraction approach, with diethyldithiocarbamate in chloroform as solvent, was developed to determine trace metal speciation in samples collected from the Weddell Sea, the Antarctic Ocean and areas of the San Francisco Bay. Graphite furnace atomic adsorption spectroscopy was employed to determine the final distribution of the metal in the samples. No evidence of silver-organic complexation was observed in samples from the Weddel Sea and San Francisco Bay. This was attributed to the high concentration of inorganic chloride complexes in those waters, which masks the chemical speciation of silver.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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A method for estimation of chlorinated biphenyls in surface waters: influence of sampling method on analytical results
Article Abstract:
Research at the Tidal Waters Division in the Netherlands has resulted in the development of an accurate method for estimating chlorinated biphyenyls (CBs) in surface waters. The study focused on the effects of various filtration methods and continuous-flow centrifugation on CB concentration levels. The new method achieved a detection limit lower than 10 picograms/kg.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1992
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Sorption of low molecular weight organic contaminants by fly ash: considerations for the enhancement of cutoff barrier performance
Article Abstract:
The use of fly ashes ashes in soil-bentonite cutoff barriers can significantly retard the transport of contaminants through the barrier. A high-carbon fly ash has a high sorption capacity for specific low-molecular-weight water-soluble contaminants. It is this high sorption capacity which disrupts the molecular diffusion of contaminants through the cutoff barriers.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1992
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