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Cited by 368

The DOI matches its Crossref record; 21 of the 21 references it cites were found in a registry or an index.

Colloid Transport in Geochemically Heterogeneous Porous Media: Modeling and Measurements

Johnson, Philip R., Sun, Ning, Elimelech, Menachem·1996·Environmental Science & Technology

Abstract

The transport of colloids in geochemically heterogeneous porous media is investigated. A model describing the transport and deposition of colloids onto heterogeneously charged mineral grains is developed and applied to column experiments. The model characterizes mineral grain surfaces according to a patchwise charge distribution, with individual patches being either favorable or unfavorable for deposition depending on their electrostatic charge. Separate rate expressions are used in the model to depict favorable and unfavorable deposition kinetics. Declining deposition kinetics that are produced when previously retained particles block subsequent at tachment of colloids are quantified in the model by dynamic blocking functions. Column experiments involving colloid transport in geochemically heterogeneous porous media were performed using silica colloids and quartz sand. Surface charge heterogeneity was introduced into the porous medium by coating a fraction of the quartz sand with iron oxyhydroxide. Theoretical breakthrough curves generated by the model using experimentally determined parameters compared quite well to the experimental results, demonstrating the importance of geochemically heterogeneous surfaces in determining the transport behavior of colloidal particles in heterogeneous aquatic environments.

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Metadata

Authors
Johnson, P. R., Sun, N., & Elimelech, M.
Venue
Environmental Science & Technology
Published
1996-10-01
Volume
30
Issue
11
Pages
3284-3293
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W2026909762
Cited by
368
References
21
FWCI
11.62
Type
journal article
Language
en
Open access
closed

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