I am measuring viral concentration in groundwater samples with high and low ionic strength, DOM and SOM. Results show that samples with no SOM have the opposite relationship with ionic strength and DOM than what was expected. Samples with high/low SOM show less of a decrease in concentration with high DOM and low ionic strength however samples with no SOM show the opposite.
Most studies I have found show that DOM can either protect the virus or compete with it for adsorption spots on solid grains. This is also what we have found with our data. However, in the samples without soil there was a greater decrease in viral concentration with high DOM. At first I thought, okay maybe this is due to an increase in ionic strength. However, when we tested the effect of ionic strength we found that there was a greater decrease in concentration with lower ionic strength. I cannot find any studies that have a similar trend.
It is a complex phenomenon in porous media involving several basic processes such as colloidal fines release, dispersion stabilization, migration and fines entrapment/plugging at the pore constrictions and adsorption at solid/liquid interface. The effects of these basic processes on the contaminant transport have been compiled.
in situ colloidal fines sources, release, stabilization of colloidal dispersion and migration which are a function of physical and chemical conditions of subsurface environment and finally their role in inorganic and organic contaminants
transport in porous media. The important aspects: (i) it gives not only complete compilation on colloidal fines-facilitated contaminant transport but also reviews the new role of colloidal fines in contaminant retardation due to plugging of pore
constrictions.This plugging phenomenon also depends on various factors such as concentration of colloidal fines, superficial velocity and bead-to-particle size ratio. This plugging-based contaminant transport can be used to develop containment technique in soil and groundwater remediation. (ii) the importance of critical salt concentration (CSC), critical ionic strength for mixed salt, critical shear
stressor critical particle concentration (CPC) on in situ colloidal fines release and migration and consequently their role on contaminant transport in porous media. (iii) It also reviews another class of colloidal fines called biocolloids and their transport in porous media.
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