|Transport characterization of different nano particles with column experiments|
|Beschreibung||NanoRem - Taking Nanotechnological Remediation Processes from Lab Scale to End User Application for the Restoration of a Clean Environment
The utilization of nano particles (NP), especially zero valent iron nano (nZVI) particles (10 – 120nm), for remediation of contaminated soil and groundwater is a promising new technology. Due to the usage of nZVI in reactive barriers, their ability to degrade a variety of contaminants is already well known. Advantages of nZVI are the high reactivity and the possibility of targeted injection in form of aqueous suspensions. |
At the research facility for subsurface remediation – VEGAS (University of Stuttgart) experiments are conducted to link research of nano particles on laboratory scale with end-user applications. The goal is the homogeneous emplacement of a defined mass of nZVI particles in a given reaction zone. By conducting column tests, different nZVI suspensions can be optimized regarding their transport in radial flow systems. Therefore, a one-dimensional column system – a so called Cascading Column System – was designed. By conducting cascading column experiments, the radial distribution of iron particle around a well can be reproduced. Therby experimental conditions (porous media, concentration, flow rate) can be fitted to boundary conditions of field situations. In the same time the effect of condition modification can be tested easily and conclusions can be drawn fast. Results of the new column systemcan be used for planning large scale injections and to predict particle distribution for empirically determined transport lengths. The characterization of constitutive relations between particle–particle in the suspension (agglomeration) and particle-porous media (sedimentation) is a challenge. Additional singel column tests will be performed to describe the transport processes (advection, dispersion, sorption) which change for different experiemtental conditions.
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|Art der Arbeit: || Bachelorarbeit || Masterarbeit || Bachelorarbeit || Masterarbeit || Independent Study || Masterarbeit || Bachelorarbeit || Masterarbeit |
|Kontakt||Dipl.-Ing. Anke Wiener|