Insignificant Role of Mineral Grain Zeta Potential to Colloid Transport in Geochemically Heterogeneous Subsurface Porous Media

Table of Contents

Insignificant Role of Mineral Grain Zeta Potential to Colloid Transport in Geochemically Heterogeneous Subsurface Porous Media 

Presentation Overview

Geochemical Heterogeneity of Subsurface Solids

Patchwise Geochemical Heterogeneity of Subsurface Solid Matrix

The Patch Model for Chemical (Charge) Heterogeneity

Objective

Synthesis of Chemically Heterogeneous Sand

Column Experiments

Effect of Geochemical Heterogeneity on Zeta Potential

Effect of Chemical Heterogeneity on Colloid Transport

Colloid Deposition Kinetics are Directly Related to Chemical Heterogeneity

Dependence of Collision (Attachment) Efficiency on Geochemical Heterogeneity

Predictions based on Zeta Potential and DLVO Theory

Surface Charge Heterogeneity and Attachment Efficiency 

Effect of Ionic Strength on Colloid Transport at a Fixed Heterogeneity

Solution Ionic Strength has a Negligible Effect on Attachment Efficiency 

Concluding Remarks

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Relevant Publication:
Elimelech, M., Nagai, M., Ko, C.-H., and Ryan, J.N. " Relative Insignificance of Mineral Grain Zeta Potential to Colloid Transport in Geochemically Heterogeneous Porous Media", Environmental Science and Technology, Volume 34, June 2000, pages 2143-2148.

For a reprint of a pdf paper please contact Prof. M. Elimelech.