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3790252 
Technical Report 
Tests of Uranium (VI) Adsorption Models in a Field Setting 
Curtis, GP; Davis, JA 
2006 
NTIS/02942833 
GRA and I 
GRA and I 
Field-based techniques were tested for determining Kd values or for validating surface complexation model-derived Kd values. The field site used for the study was a uranium mill tailings site at Naturita, Colorado. The techniques tested included: (1) the use of downhole in-situ devices that held a sample of a single mineral or sediment that were deployed in the aquifer contaminated with uranium, (2) in-situ push-pull tracer tests conducted within the contaminated aquifer, and (3) small-scale U(VI) migration tracer tests conducted within the aquifer. The experiments were conducted on scales that ranged from centimeters for the downhole devices to several meters for the small-scale tracer tests. 
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