Physicochemical influences on electrohydrodynamic transport in compressible packed beds of colloidal boehmite particles

TL;DR

This paper investigates how pH and compression affect electrohydrodynamic transport in packed beds of colloidal boehmite particles, providing new measurement techniques to understand surface charge effects.

Contribution

It introduces a novel method to quantify surface conductance to liquid conductance ratio, enhancing understanding of charge transport in packed beds.

Findings

pH significantly influences electrohydrodynamic parameters

Compression alters the structure and transport properties

New measurement approach separates surface and liquid conductance effects

Abstract

Production and processing of colloidal particles require a deeper understanding of surface charge of particles and interaction of mass and charge transport in packed beds. The assessment of fundamental parameters is rather complex due to the additional influence of the particle charge on the structure of a packed bed. The combination of different measurement techniques (streaming potential and electroosmosis) allows for separating the effects, based on the postulation of a new method to quantify the ratio of surface conductance to liquid conductance. The purpose of this paper is to investigate the influence of the pH value and compression on the electrohydrodynamic transport parameters.