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This study theoretically examined attachment/detachment of negatively charged microparticles onto/from a negative planar surface carrying a positively charged square patch of different sizes. The surface element integration technique was used to calculate Derjaguin–Landau–Verwey–Overbeek (DLVO) interaction energies at different ionic strengths. Results show that a critical patch size is needed to...
Knowledge of colloid straining mechanism in porous media is of importance for protecting groundwater from being contaminated by biocolloids (e.g., bacteria and protozoa) and by contaminants whose transport can be facilitated by mobile particles. This study examined effects of flow velocity on colloid straining in porous media under unfavorable chemical conditions. Saturated column experiments were...
This study systematically examined coupled influence of particle size and surface roughness on colloid detachment during transients in solution chemistry. A modified Derjaguin approach was utilized to three-dimensional which determined the variation of Derjaguin–Landau–Verwey–Overbeek (DLVO) interaction energies in detachment processes for elemental models of a rough surface: a hemisphere on a flat...
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