Bīstamās vielas Gaujas sateces baseina ezeru sedimentos
Date
2013
Authors
Kazāka, Maija
Journal Title
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Publisher
Latvijas Universitāte
Abstract
Viens no izplatītākajiem antropogēnās darbības rezultātā izraisītajiem piesārņojumiem ir ar smagajiem metāliem. Kaut arī pēdējā laikā tiek īstenota stingrāka bīstamo vielu kontrole, bet tik un tā, smago metālu koncentrācijas sedimentos būtiski pārsniedz to pirmsindustriālā laika līmeņu atzīmes.
Pētījuma mērķi bija noskaidrot - Gaujas sateces baseina ezeru sedimentu kvalitāti, novērtējot tos pēc noteiktajām metālu un alvas organisko savienojumu koncentrācijām. Darba ietvaros tika iegūta informācija par pētāmajiem ezeriem un tajos nosakāmo bīstamo vielu īpašībām un ietekmi uz vidi. Tika apsekoti Gaujas sateces baseina ezeri, kur tika ņemti sedimentu paraugi. Paraugos tika noteiktas smago metālu: Zn, Cd, Hg, Pb, Ni un alvas organisko savienojumu koncentrācijas. Pēc iegūtajiem rezultātiem tika secināts par ezeru piesārņotību ar bīstamajām vielām.
Atslēgas vārdi: Gaujas sateces baseins, ezera sedimenti, smagie metāli.
One of the most common pollutants caused by anthropogenic activities comes from the heavy metals. Despite the fact that nowadays the regulation of emissions of hazardous substances has become stricter, the concentrations of heavy metals in sediments are well above the pre-industrial levels. The goal of this work was to estimate river Gauja basin lake sediment quality according to the metals and organotin compounds concentrations in them. During the study, information about the lakes and hazardous substances was gathered and examined, with particular emphasize of their impact on the environment. The sediment samples were obtained from lakes of Gauja drainage area. Sediment samples were further analysed for heavy metals: Zn, Cd, Hg, Pb, Ni and organotin compounds. After analysis of the results was completed, the conclusions about lake contamination with hazardous substances were drawn. Keywords: River Gauja catchment area, lake sediments, heavy metals.
One of the most common pollutants caused by anthropogenic activities comes from the heavy metals. Despite the fact that nowadays the regulation of emissions of hazardous substances has become stricter, the concentrations of heavy metals in sediments are well above the pre-industrial levels. The goal of this work was to estimate river Gauja basin lake sediment quality according to the metals and organotin compounds concentrations in them. During the study, information about the lakes and hazardous substances was gathered and examined, with particular emphasize of their impact on the environment. The sediment samples were obtained from lakes of Gauja drainage area. Sediment samples were further analysed for heavy metals: Zn, Cd, Hg, Pb, Ni and organotin compounds. After analysis of the results was completed, the conclusions about lake contamination with hazardous substances were drawn. Keywords: River Gauja catchment area, lake sediments, heavy metals.
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