Description: Das Projekt "Modification, mobilisation and colloidal stability of engineered inorganic nanoparticles in soils environment" wird/wurde gefördert durch: Deutsche Forschungsgemeinschaft. Es wird/wurde ausgeführt durch: Albert-Ludwigs-Universität Freiburg, Institut für Geo- und Umweltnaturwissenschaften, Professur für Bodenökologie.So far, there is little knowledge on the fate of nanoparticles and nanoparticle-associated pollutants in soils. From the state of the art we presume nanoparticle aging in soils to change their surface characteristics, their sorption capacity and mobility. However, the processes controlling nanoparticles aging in soils are hardly investigated. We hypothesize that engineered inorganic nanoparticles (EINP) in soil undergo pedogenic processes such as chemical weathering, accumulation of organic matter and aggregation and that these processes govern both, the mobility of EINP and their sorption capacity for contaminants. Thereby we will mainly address the two key hypothesis of INTERNANO that (i) nanoparticle aging involves reversible and irreversible changes and (ii) that nanoparticle mobility and their interactions with pollutants are determined by environmental conditions rather than by original surface characteristics. We will expose nanoparticle to soils and soil suspensions under various, defined conditions. At the end of the respective incubation time we will study the change in surface properties, aggregation state and contaminant sorption onto nanoparticles, using methods, which are suitable for nano-scale analyses (light scattering, HR TEM, XANES). Size effects on aging will be analysed exemplarily for TiO2 EINPs. The derived process knowledge will help to evaluate the environmental significance of nanoparticles in soils and serve as a basis to predict risks associated with nanoparticle leaching from soils.
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Origins: /Bund/UBA/UFORDAT
Tags: Humus ? Bodenkunde ? Chemikalien ? Studie ? Bodenschadstoff ? Nanopartikel ? Risiko ?
Region: Baden-Württemberg
Bounding boxes: 9° .. 9° x 48.5° .. 48.5°
License: cc-by-nc-nd/4.0
Language: Englisch/English
Time ranges: 2011-01-01 - 2025-06-05
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