The CHESHIRE Migration Experiment A Summary Report

Sawyer, David A.; Thompson, J.L.; Smith, David K.

doi:10.2172/15130

1999

DOI: 10.2172/15130

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The CHESHIRE Migration Experiment A Summary Report

David A. Sawyer¹,

J.L. Thompson²,

David K. Smith³

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2011

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Colloid-Facilitated Transport of Plutonium at the Nevada Test Site, NV, USA

Kersting

Zavarin

2011

Actinide Nanoparticle Research

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Increasing observations of subsurface actinide transport has reinforced the need for a basic geochemical and hydrologic understanding of how these contaminants are transported in groundwater. At the Nevada Test Site, NV, USA, low-levels of plutonium have been shown to migrate on the scale of kilometers. At all but one sampling location the Pu is associated with the colloidal fraction (<1 mm) consisting predominantly of clays and zeolites. The majority of the Pu ($70%) is associated with the smallest nanoparticle (e.g., colloid) size fraction of 10-100 nm and in one case was identified as associated with a clay colloid. At one unique sampling site, Pu is predominantly associated with dissolved organic matter. Monitoring at over 20 contaminated groundwater sites at the NTS suggests that low-levels of Pu can be mobilized either via colloid-facilitated transport in fractured rock or as a result of aqueous Pu stabilization by anthropogenic levels of dissolved organic matter. Nevertheless, activities above the EPA's Maximum Contaminant Level (MCL) for alpha-emitting radionuclides (15 pCi/L, 0.56 Bq/L) have been measured at only two locations at the NTS.

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Colloid-Facilitated Transport of Plutonium at the Nevada Test Site, NV, USA

Kersting

Zavarin

2011

Actinide Nanoparticle Research

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show abstract

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The CHESHIRE Migration Experiment A Summary Report

Cited by 1 publication

References 25 publications

Colloid-Facilitated Transport of Plutonium at the Nevada Test Site, NV, USA

Colloid-Facilitated Transport of Plutonium at the Nevada Test Site, NV, USA

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