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Vadose Zone Journal
Vol. 3, No. xx, 2004; Pages: 326–337

Colloid Transport in the Subsurface: Past, Present, and Future Challenges

John F. McCarthy* and Larry D. McKay

Department of Earth and PlanetarySciences, 306 Earth and Planetary Sciences Bldg., University of Tennessee, Knoxville, TN 37996-1410.


This paper attempts to introduce the work described in this specialsection on colloid transport within a more general perspective ofthe evolution of our understanding of the importance of colloids insubsurface systems. The focus will be on the transport of colloidalparticles in natural (i.e., chemically and physically heterogeneous)geological settings because the complexity imposed by these situationsrepresents the greatest challenge to current and future understanding.Great progress has been made in addressing many of the key questionsrelated to colloid transport. However, as in most areas of science, increased knowledge also serves to reveal new and more complexchallenges that must be addressed.

Keywords:heterogeneous,microorganisms,calcium sulfate,Colloid Transport,radionuclides.

Corresponding author:

E-mail: jmcctar1T@utk.edu


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