Abstract
The space-time distribution of some pollutants (Cu, Pb, Zn, Cd, Fe, Mn, V, Ni, Cr) in the sludge of the canals of Venice was studied. The contamination levels were comparable to, or higher, than those measured in the most polluted sediments of the Lagoon of Venice. Sediments were collected by two different sampling techniques: 1) collection of sediment cores (upper 5 cm) by a syringe-type corer; 2) collection by traps, placed on the bottom of the canal. Traps permitted the sampling of sediments essentially resuspended by overlying water turbulence. This sediment fraction is subjected to variations of its physicochemical parameters (principally change of redox conditions) and therefore to pollutant exchange at the water/sediment interface.
The metals principally exchanged during sediment resuspension were Cd, Pb, Zn and Cu. These metals have principally an anthropogenic origin and are bound to the most labile geochemical phases of the sediment (such as sulphides), which can be oxidised during sediment resuspension, releasing metals into the water. Fe, Cr and Ni were only partially exchanged, while Mn and V were generally not exchanged; a significant fraction of these metals is of natural origin and is bound to the most refractory phases of the sediment.
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References
Agemian, H. and Chau, A. S. Y.: 1976, Analyst 101, 761–767.
Alberotanza, I. and Dazzi, R.: 1970, Techn. Report n. 12, National Council of Research (CNR), (in Italian).
Chester, R. and Voutsinou, F. G.: 1981, Mar. Pollut. Bull. 12, 84–91.
Chiozzotto, E. and Scattolin, M.: 1994, Final Report for the Venice Municipality (in Italian).
Donazzolo, R., Orio, A. A., Pavoni, B. and Perin, G.: 1984, Oceanol. Acta 7, 25–32.
Dorigo, L.: 1966, Istituto Veneto di Scienze, Lettere ed Arti, Rapporti e Studi, vol. 3, 129–151 (in Italian).
Förstner, U. and Wittmann, G. T. W.: 1981, in: Metal Pollution in the Aquatic Environment (2nd ed.), Springer-Verlag, Berlin, pp 190–227
Guerzoni, S., Rovatti, G., Molinaroli, E. and Rampazzo, G.: 1987, Chemistry and Ecology 3, 39–48.
Morse, J. W.: 1994, Mar. Chem. 46, 1–6.
Morse, J. W., Millero, J. F., Cornwell, S. C. and Richard, D.: 1987, Earth Sci. Rev. 24, 1–42.
Plantz, P. E.: 1984, in: Modern Method of Particle Size Analysis, J. Wiley & Sons, New York, p. 173.
Salomons, W.: 1985, Environ. Technol. Letters 6, 315–326.
Sfriso, A., Pavoni, B., Marcomini, A., Racanelli, S. and Orio, A. A.: 1992, Environ. Technol. 13, 473–483.
Zaggia, L., Argese, E. and Zonta, R.: 1996, Toxicol. Environ. Chem. 54, 11–21.
Zaggia, L. and Zonta, R.: 1996, Appl. Geochem., submitted.
Zonta, R., Argese, E., Costa, F., Racanelli, S., Scattolin, M. and Zaggia, L.: 1985, in: Proc. Int. Conf. Heavy Metals in the Environment, Hamburg, pp.439–442.
Zonta, R., Zaggia, L. and Argese, E.: 1994, Sci. Total Environ. 151, 19–28.
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Argese, E., Ramieri, E., Bettiol, C. et al. Pollutant Exchange at the Water/Sediment Interface in the Venice Canals. Water, Air, & Soil Pollution 99, 255–263 (1997). https://doi.org/10.1023/A:1018329726495
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DOI: https://doi.org/10.1023/A:1018329726495