Description: Das Projekt "Biologische Dekontamination schwermetallbelasteter Boeden mit Hyperakkumulatoren: Beeinflussung der Schwermetallaufnahme im Wurzelraum" wird vom Umweltbundesamt gefördert und von Eidgenössische Technische Hochschule Zürich (ETHZ), Institut für Terrestrische Ökologie ITOE durchgeführt. Remediation of heavy-metal polluted agricultural soils requires gentle methods, i.e. methods by which the fertility of the soil is fully restored. This means that harsh methods such extraction of metal pollutants by strong acids or soil washing are not applicable as they do not only remove the pollutants, but also destroy the physical and chemical basis of soil fertility, e.g. soil structure and cation exchangers, as well. Soil cleaning by methal harvesting through accumulator plants is a promising technique for the gentle remediation of heavy metal contaminated soils. Up to now one major problem of this technique has been however the comparatively low productivity of candidate accumulator plants under field conditions. In this project we investigate possibilities to improve the efficiency of this method by enhancing the availability of the pollutants for the roots of the accumulator plants, i.e. by applying mobilizing additives such as chelator agents or by optimizing root growth through classical agricultural techniques such as soil preparation, fertilization and harvesting regimes. Leading Questions: Can metal-accumulating plants be used to clean-up heavy-metal polluted calcareous soils for agricultural or similar re-use?
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Schwermetallbelastung ? Zürich ? Akkumulator ? Ökologie ? Zusatzstoff ? Schwermetall ? Pflanzenverfügbarkeit ? Bodenfruchtbarkeit ? Bodenstruktur ? Bodenverbesserung ? Rhizosphäre ? Verfahrensoptimierung ? Bodenwäsche ? Pflanzenwurzel ? Metall ? Phytoremediation ? Ackerboden ? Ackerland ? Bodensanierung ? Chemikalien ? Fruchtbarkeit ? Ionenaustausch ? Schadstoffmobilisierung ? Biologische Behandlung ? Bodenschadstoff ? Produktivität ? Aufbereitungstechnik ? Schadstoffakkumulation ? Effizienzsteigerung ? Landwirtschaft ? gentle remediation ? mobilization of heavy metals ? Schadstoffaufnahme ? hyperaccumulting plants ?
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1996-04-01 - 1999-12-31
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