Figure 1. Triangular shaped container to simulate radial flow fields
I have written my PhD thesis on the work I have been performing at the Research Facility for Subsurface Remediation, VEGAS, which is a department of the Institute for Modelling Hydraulic and Environmental Systems at the University of Stuttgart|
I had my exam on July 19, 2012, a link to an online version of my dissertation will follow.
In my research I worked with nano sized zero valent iron (nZVI) colloids. These colloids are capable of dechlorinating chlorinated hydrocarbons (e.g. PCE).
Transport of Nano Sized Zero Valent Iron Colloids during Injection into the Subsurface
Structure of the Dissertation
Figure 2. Overview of the structure of the dissertation
The work distinguishes four main chapters beside the introduction (Chapter 1).
Chapter 2 presents the developed quantitative non-destructive measuring and detection techniques based on the ferro magnetic property of nZVI to measure the nZVI concentration in the porous medium at the column, container and field scale. A chemical (destructive) analysis method was furthermore developed to provide a chemical verification method of the non-destructive measurements as well as to characterize nZVI suspensions.
Chapter 3 provides a description of colloid transport and constitutive relationships derived from the colloid filtration theory, column experiments and numerical simulations of the column experiments.
Chapter 4 focuses on the transport in a radial flow field. A large scale container experiment (Figure 1) is presented. The results of this experiment were used to verify a quick screening column experiment and a numerical predictive model.
Chapter 5 shows how the experiments and the numerical simulations provide a method to test the injection feasibility and can be used to design a field application. Recommendations and the preferred approach for the design are presented.
At the end of the work the answers on the research questions are summarized in the conclusion and an outlook provides further research topics that could be performed.
Tips and Tricks
Here are some scriptings for data analysis and calculations:
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