Applicability of colloid filtration theory in size-distributed, reduced porosity, granular media in the absence of energy barriers.

The vast majority of colloid transport experiments use granular porous media with narrow size distribution to facilitate comparison with colloid filtration theory, which represents porous media with a single collector size. In this work we examine retention of colloids ranging in size from 0.21 to 9.

Gravitational settling effects on unit cell predictions of colloidal retention in porous media in the absence of energy barriers.

Laboratory column experiments for colloidal transport and retention are often carried out with flow direction oriented against gravity (up-flow) to minimize retention of trapped air. However, the models that underlie colloidal filtration theory (e.g.