AI Article Synopsis
- This study investigates how graphene oxide nanoparticles affect the movement of three types of bacteria (E. coli, E. faecalis, and S. aureus) through water-saturated sandy soil.
- Flowthrough experiments revealed that the presence of graphene oxide nanoparticles reduced the recovery of these bacteria in the water effluent, with E. coli and E. faecalis being more susceptible to the nanoparticles than S. aureus.
- The researchers used extended DLVO theory to analyze the interactions between the nanoparticles and bacteria, highlighting the significant impact of graphene oxide on the transport behavior of these biocolloids.
Article Abstract
This study examines the effect of graphene oxide (GO) nanoparticles (NPs) on the transport (individual species) and cotransport (simultaneous transport) of three biocolloids (Escherichia (E.) coli, Enterococcus (E.) faecalis and Staphylococcus (S.) aureus) in water saturated porous media. Flowthrough experiments were performed in 30-cm long laboratory columns packed with quartz sand. All of the experiments were conducted at room temperature (22 °C), pH = 7, and ionic strength I = 2 mM. The results from the cotransport experiments indicated that the mass recovery values for all biocolloids, calculated based on total biocolloid concentration in the effluent, were reduced in the presence of GO NPs. The strains E. coli and E. faecalis were shown to be more vulnerable to GO NPs than S. aureus. Temporal moments of the breakthrough concentrations suggested that the presence of GO NPs significantly influenced the fate and transport of the three biocolloids. Extended DLVO theory was used to quantify the various interaction energy profiles, based on electrokinetic and hydrodynamic measurements.
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| http://dx.doi.org/10.1016/j.colsurfb.2020.110841 | DOI Listing |
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