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Živo srebro v tleh in rastlinah na poplavnih ravnicah Idrije = Soil-plant mercury concentrations in the Idrijca river terraces (Slovenia)Gosar, Mateja, 1963-Predmet prikazane raziskave so vsebnosti živega srebra v rastlinah in tleh na poplavnih ravnicah v spodnjem toku Idrijce. Vzorci povprečne krme in ozkolistnega trpotca (Plantago lanceolata) vsebujejo ... od 0,055 do 0,220 mg Hg/kg suhe snovi. Navedene vrednosti so v primerjavi z vzorci iz sedemdesetih let iz Idrije relativno nizke, glede na vsebnosti živega srebra v tleh. So istega reda velikosti, kot so bile določene v okolici opuščenega Hg rudnika v Podljubelju. Glede na navedbe o vsebnostih v neobremenjenih tleh pa lahko ugotovimo, da so na poplavnih ravnicah ob Idrijci precej nad nivojem ozadja. Vsebnost celotnega živega srebra v tleh le do neke mere vpliva na vsebnost v rastlinah. Če primerjamo vzorce s poplavnih ravnic pri kmetiji Temnikar, vidimo, da vsebnosti v tleh skokovito naraščajo od tretje do prve obrečne terase. V rastlinah pa so razlike majhne, verjetno zato, ker je velik del živega srebra vezan v cinabaritu, ki je za rastline nedostopen. Na prvi obrečni ravnici (lokacija TEM3), kjer vsebujejo tla (povprečje zgornjih dveh vzorcev tal) kar 55-krat več Hg kot na tretji poplavni ravnici, vsebuje vzorecpovprečne krme 1,6-krat več in vzorec trpotca 1,8-krat več Hg kot ustrezna vzorca na tretji poplavni ravnici.Source: Geologija. - ISSN 0016-7789 (Knj. 47, [št.] 2, 2004, str. 259-271)Type of material - article, component partPublish date - 2004Language - slovenianCOBISS.SI-ID - 1106005
Author
Gosar, Mateja, 1963-
Topics
rudniki |
živo srebro |
onesnaževanje |
onesnaženost |
tla |
vegetacija |
sedimenti |
geokemija |
kemična sestava |
Idrijca |
Idrija
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Gosar, Mateja, 1963- | 10667 |
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