Global ETD Search
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Showing 1 to 5 of 5 for “"Colloid Transport"”.
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Modelling the transport of iron-based colloids in saturated porous media
… develop a numerical model able to describe the transport of highly concentrated suspensions of iron particles, in particular during their injection in the subsurface, and in the early stages of migration through the porous matrix. The model is intended to be used as a tool in the development of …
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Quantification of Trapped Diluted Bitumen Droplets in Gravel: an Experimental Study
… droplets were generated in a mixing reactor and transported through a one-dimensional gravel-packed aluminum column. Gravel sizes of 3 mm and 8 mm, and flow velocities of 0.09 cm/s and 0.35 cm/s were investigated to identify the impacts of these influential parameters on the trapping of dilbit …
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Separation of Colloidal Particles in a Packed Column using Depletion Forces
Depletion forces were used to separate an equinumber density binary dispersion of 1.5 and 0.82 µm polystyrene sulfate (PS) particles. Experiments consisted of injecting a pulse of a binary dispersion of PS particles into the inlet of a packed bed of 0.5 mm silica collector beads. Prior to …
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Particle Detachment in Single-Phase and Two-Phase Flows in Porous Media
… velocity of clusters is higher than for single colloids and provides better agreement with the laboratory results. The behaviour of particles and clusters was also investigated during drainage and imbibition in visualisation experiments. Particles remain on the air-water interfaces of residual …
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Investigations on mobility of carbon colloid supported nanoscale zero-valent iron (nZVI) for groundwater remediation
… due to fast agglomeration and sedimentation of colloidal suspensions of nZVI, which leads to very short transport distances. To overcome this issue of limited mobility, polyanionic stabilisers are added to increase surface charge and stability of suspensions. In field experiments maximum …