Hydrobiological Journal

ISSN for PRINT: 0018-8166

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2008, Volume44

Issue 2

104 pages

DOI: 10.1615/HydrobJ.v44.i2

Issue price - $399.00

P. N. Linnik
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev, Ukraine

Results of experimental studies on the influence of fulvic acids on the behavior of metals (Mn, Al, Cu, Zn, Pb, and Cr) in the "bottom sediments − water" system are presented. The addition of fulvic acids to the natural water, which was in contact with silted bottom sediments, resulted in the additional decrease in the concentration of dissolved oxygen, and also in the formation of anaerobic conditions in the system. As a consequence, the intensity of metals migration from bottom sediments increased. The concentration of metals in the water increased with increasing the content of fulvic acids. The peculiarities of the influence of fulvic acids on the process of desorption of some metals from bottom sediments are discussed. It has been found that the major portion of metals migrates from bottom sediments in the composition of complex compounds with dissolved organic matter, the molecular mass of which is not more than 2.0 kDa. This phenomenon is accounted for by a predominance of the above-mentioned complexes in the pore solutions of bottom sediments, and also by the process of complexation involving the fraction of the added fulvic acids of the same molecular mass.

DOI: 10.1615/HydrobJ.v44.i2.90 Download article, 89-103 pages

Article price - $55.00

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