Adsorption and uptake of Cu by Emiliana husleyi in naturl seawater

Article Abstract:

These short-term kinetic experiments conducted in nitrate- and phosphate-rich natural coastal seawater reveal that Emiliania huxleyi has the ability to uptake Cu very rapidly. The experiments were conducted by Laquipai, Chemistry Department, Faculty of Science, University of Porto in Portugal.

Research and Testing Services, Scientific Research and Development Services, Portugal, Research & Development-Universities, University research, Porto, University of. Faculty of Science. Laquiapi Chemistry Department

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Strong copper-binding behavior of terrestrial humic substances in seawater

Article Abstract:

The amount of toxicity determined by the amount of copper concentrated in seawater is studied. Copper-complexing ligands found in coastal areas near seawater salinity present at nanomolar concentrations are stronger with conditional copper binding constants one trillion and greater, and weaker with ligands observed with conditional binding constants between one hundred million and one hundred billion.

United States, Biochemistry, Administration of Air and Water Resource and Solid Waste Management Programs, Water Pollution R&D, Biotechnology industry, Biotechnology industries, Illustration, Natural resources, Ligand binding (Biochemistry), Toxicity testing, Toxicity tests

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Iron redox cycling in surface waters: effects of humic substances and light

Article Abstract:

A study was conducted to test the effects of light and humic substances on iron redox cycling in surface waters to understand the mechanism of iron-catalyzed photooxidation of humic substances and its effects on iron speciation. Fulvic acid and lepidocrocite were placed in models system kept at pH3 and pH5, in both aerated and unaerated conditions, and irradiated with simulated sunlight. Results showed two mechanisms of fulvic acid photo-oxidation, one which reduces oxygen to HO2/O2- in the absence of metals and a second photo-induced LMCT reaction of Fe(III)-fulvate complex.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Iron Compounds NEC, Water Pollution Control R&D, Environmental aspects, Aquatic ecology, Oxidation-reduction reaction, Oxidation-reduction reactions, Iron, Iron (Metal), Iron compounds, Photochemistry

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