National Institute of Biology and BF, Department of Biology, Ljubljana - all departments (BFBNIB)
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Transport of biologically active substances through gravel strataBricelj, Mihael ; Sedmak, Bojan, 1952-Cyanobacterial blooms commonly occur in eutrophic and mezoeutrophic waterbodies. In some of cyanobacterial genera develop toxic species that produce neurotoxic or hepatotoxic toxins harmful to humans ... and animals. In rural areas of Nothern Slovenia drinking water capture instalations are seldom very close to the lakes and ponds where almost every year toxic specia of cyanobacteria bloom. The migration of dissolved microcystins is possible to the water network that can cause severe damage to the domestic animals and inhabitants of this region. For this reason laboratory experiments were done to establish the time relation spread of dissolved microcystins and other organisms and substances through gravel strata. The transport of bacteriophages (Salmonella phage P22H5), cyanobacteria (Microcystis aeruginosa 2), chlorophyll a and dissolved microcystins has been studied in laboratory conditions. Plexy glass columns were used with dimensions of 10 cm width and 100 cm lenght filled with the gravel from Drava fieldnear Maribor. The throughflow values of water in colums were regulated by hidrostatic pressure and regulation valve. Results of tracing curves of individual substances depict that the cells of cyanobacterium Microcystis aeruginosa appear first, but their recovery ratio is low. Chlorophyll a and bacteriophages pass through gravel in column almost with the same velocity, but the recovery value of bacteriophages is a little greater. Dissolved microcystins take longer time to pass through the column; their recovery value is the lowest of all tracers used.Source: New approaches characterizing groundwater flow : proceedings of the XXXI International Association of hydrogeologists Congress, Munich, Germany, 10-14 September 2001 (str. 25-29)Type of material - article, component part ; adult, seriousPublish date - 2001Language - englishCOBISS.SI-ID - 933711
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Bricelj, Mihael | 02755 |
Sedmak, Bojan, 1952- | 07736 |
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