"Optimization of the Migration Properties of Nanofer 25s Nanoparticles in Porous Media using Cascading Columns"Zero-Valent Iron (ZVI) has recently received much attention in In-Situ remediation technologies
for remediating many groundwater pollutions such as Chlorinated Hydrocarbons (CHCs) and
turning them into harmless compounds. CHCs are a group of chemicals composed of carbon,
chlorine, and hydrogen with very low solubility. Their dissolution into groundwater will take
over decades or centuries, forming plumes that can target rivers, lakes and drinking water wells.
In the past permeable reactive barriers were used for treatment of plume, made by excavating
trench and filling them with granular ZVI. But the problem with this method is that it can only
remediate the plume but not the source zone. So a relatively new promising method came into
consider. In this way nano- to micro- scale iron suspension have been injected into subsurface
using injection wells, targeting the source zone of contamination.
Although various injectable ZVI particles are already commercially available, there are still
major uncertainties about their application. Many experimental and numerical researches have
been done to characterize their transport in porous media. Nano sized iron particles are injectable
and to some extend mobile in the subsurface, but it is still difficult to predict and verify the
injection radius. Thus it needs more investigation to find the fundamental parameters for a
Nanofer 25s is one of the commercially available products, produced by Czech company NANO
IRON s.r.o. There are variable claims about migration properties of these particles which require
a thorough investigation to help potential users choose the right concentration of injection slurry.
In this research project, cascading columns experiments are conducted to get a better
understanding of particles transport around an injection well. It has been shown that the transport
distance of nano iron particles are affected by different parameters such as concentration of
injection slurry, modifiers, discharge, permeability of porous media and seepage velocity