Description: Das Projekt "Untersuchung der Auswirkung des Wachstums von Mikroorganismen auf die Schwermetallmobilisierung" wird vom Umweltbundesamt gefördert und von Universität Zürich, Institut für Pflanzenbiologie, Abteilung Physiologie und Mikrobiologie durchgeführt. The ever increasing levels of industrial activity have led to greater quantities of toxic metals being deposited in natural ecosystems. The aim of this project was to investigate the role of microbial byproducts on the mobility (i.e. solubilisation, complexation and precipitation reactions) of such deposited heavy metals. Two experimental systems were studied: a) a laboratory simulated soil ecosystem utilising a media designed to represent the macronutrients found in soil solution. Various mixed soil cultures and a pure Cd resistant strain of Alcaligenes eutrophus were tested for their ability to release or immobilise bound Cd. b) a sediment ecosystem in an alpine lake, where sulphate reducing bacteria produce sulphide in sufficient levels to precipitate heavy metals as insoluble metal sulphides. The anoxic, sulphide rich conditions present in the sediment have prevented the remobilisation of Cd and Pb and led to the formation of 'stable' metal profiles.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Tierhaltungsanlage ? Zürich ? Sulfid ? Schadstoffbelastung ? Botanik ? Cadmium ? Seensediment ? Mikrobiologie ? Schwermetall ? Schwefel ? Arsen ? Kolloid ? Ökotoxizität ? Schwermetallmobilisierung ? Bakterien ? Metall ? Bodenbelastung ? Bodenlösung ? Bodenökosystem ? Nebenprodukt ? Stoffbewertung ? Toxische Substanz ? Mikroorganismen ? Sediment ? Naturhaushalt ? Niederschlag ? Ökosystem ? Schadstoffverhalten ? Sedimentation ? Stoffkreislauf ? Microorganismes ? Metal lourd / metal ? Sediment, sedimentation ? Wachstum [biologisch] ?
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1988-01-01 - 1992-08-10
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