Description: Das Projekt "Antimony leaching from contaminated soil under different water regimes" wird vom Umweltbundesamt gefördert und von Eidgenössische Technische Hochschule Zürich, Institut für terrestrische Ökosysteme, Ökosystemmanagement durchgeführt. Antimony (Sb) is a rather rare element in the earth's crust, but in the recent past, human activities have led to highly elevated Sb concentrations in soils and sediments at many locations and, as a consequence, to increased exposure of biota to this toxic element. Soil contamination by Sb has recently become an urgent issue in particular on shooting ranges. In Switzerland, all shooting ranges are currently examined and will be remediated within the next decade. This implies the removal of large quantities of contaminated soil. Large fractions of these soils are not heavily contaminated but have to be treated because they are located in pollution-sensitive areas such as groundwater protection zones. This soil can potentially be reused for less sensitive types of land-use, saving high treatment costs and precious hazardous waste disposal space. Knowledge about the risks of Sb leaching from such soils is very limited, however. One key factor regarding solute leaching is the water regime, particularly in soils subject to permanent or periodic water-logging. Water-logging strongly inhibits soil aeration, and this can have a strong influence on the entirety of chemical and biological conditions affecting solute transport in soil. This holds all the more for elements that are sensitive to changes in their oxidation state under environmental conditions such as Sb. Given that there is very little information available on the transport behavior of Sb in soils, particularly under dynamic water regimes, this project has the aim to investigate the influence of water-logging on Sb leaching from contaminated soil. For this purpose, we carry out experiments with a relocated shooting range soil as well as with a comparable synthetic soil in order to identify and model the role of sorption and redox processes on Sb mobilization and leaching. Special attention will be given to the speciation of Sb in the soil solution. The results will be relevant beyond providing a scientific basis for the risk assessment of Sb leaching from contaminated soil, as it will also further the mechanistic understanding of how water-logging affects the transport of redox-sensitive solutes in soils in general.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Biopharmazeutikum ? Zürich ? Antimon ? Holzeinschlag ? Schadstoffbelastung ? Brunnen ? Schweiz ? Abfallentsorgung ? Bodenverunreinigung ? Bodenwasser ? Gefährlicher Abfall ? Seltene Erden ? Wirkung ? Exposition ? Abfall ? Baunutzungsverordnung ? Bewässerung ? Bewertung ? Bodenlösung ? Bodentyp ? Chemikalien ? Erdkruste ? Flächennutzung ? Lüftung ? Mensch ? Modellversuch ? Terrestrisches Ökosystem ? Oxidation ? Schießanlage ? Sorption ? Toxizität ? Wasserschutzgebiet ? Sediment ? Wasser ? Boden ? Bodenschadstoff ? Beseitigung ? Flächenanteil ? Risikobewertung ? Risiko ? Standortbedingung ? Umweltveränderung ? Verkehr ? Kosten ? Verunreinigung ? Staat ? Konzentrat ? PERMANENT ? VERGLEICHBARKEIT ? VERHAELTNIS ? Vermehrung ? WISSENSCHAFTLICH ? ZWECKBESTIMMUNG ? FRAKTION ? PROJEKT ? GEFAEHRLICH ? EIN ? EINGESCHRAENKT ? RETTUNG ? SCHUTZ ? STANDORT ? KONTAMINIEREN ? STARK ? BEZUG ? THEMA ? EMPFINDLICHER BEREICH ? ENTFERNUNG ? UNTER ? VERARBEITEN ? BESONDER ? VERFRACHTUNG ? ERGEBNIS ? Erlass [Recht] ? LAENDER ? LOESUNG ? NEU ? VERFUEGBAR ?
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2010-04-01 - 2013-03-31
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