Transport of radionuclides in natural fractures: some aspects of laboratory migration experiments

Vandergraaf, T. T.; Drew, D. J.; Archambault, D.; Ticknor, K. V.

doi:10.1016/s0169-7722(96)00060-5

Cited by 30 publications

(11 citation statements)

References 2 publications

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“…However, the use of clay particles to investigate colloid‐associated Cs transport through fractures is relatively rare despite these particles' high abundance in natural systems (Möri et al, 2003). Considering the well‐known importance of fractures as favorable routes for colloids (McKay et al, 1993; McKay et al, 2002; Weisbrod et al, 2002; Zvikelsky and Weisbrod, 2006) and the existence of radioactive waste sites or potential repositories and nuclear facilities on fractured formations (Baek and Pitt, 1996; Vandergraaf et al, 1997; Möri et al, 2003; Missana et al, 2008; Yamaguchi et al, 2008), understanding colloid‐facilitated transport of Cs through fractures is of the utmost relevance.…”

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confidence: 99%

Dissolved and Colloidal Transport of Cesium in Natural Discrete Fractures

Tang

Weisbrod

2010

J of Env Quality

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Transport of cesium (Cs) was investigated in a saturated natural chalk fracture with an average equivalent hydraulic aperture of 129 microm. The results show that Cs (inflow concentration of 0.22 mmol L(-1)) can be transported in its dissolved form and in association with montmorillonite. Humic acid (HA) did not sorb Cs but enhanced colloid-associated Cs transport by 12.5% in terms of breakthrough curve (BTC) recovery. The BTCs clearly showed desorption of Cs from the fracture walls during the artificial rainwater (ARW)-injection period. Cesium transport associated with montmorillonite colloids was significant, with a maximum colloid-associated Cs C/C(0) (outflow-to-inflow concentration ratio) value of 16.6 +/- 1.1% during the tracer (colloids and LiBr)-injection period. However, the relative contribution of colloid-associated Cs transport to total Cs transport was relatively low, amounting to 10.3 +/- 0.7% and 14.5 +/- 0.7% with montmorillonite (500 mg L(-1)) and the montmorillonite-HA (10 mg L(-1)) mixture, respectively. Readsorption of Cs onto the colloids occurred immediately on switching from the tracer suspension to the background solution of ARW. The significant colloid-associated Cs transport, the stripping effect of Cs from colloids, and the slow desorption of Cs from fracture walls reported in this study have important implications for risk assessments of Cs mobility in fractured carbonatic rocks.

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confidence: 99%

Dissolved and Colloidal Transport of Cesium in Natural Discrete Fractures

Tang

Weisbrod

2010

J of Env Quality

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“…Vandergraaf et al (1997) performed a radionuclide migration experiment in a natural fracture in a quarried 1 m-granite block. Wilson (1997, 1999a,b) demonstrated a laboratory-based method for physically investigating permeability upscaling on a relatively homogeneous block of Berea Sandstone and on a meter-scale block of volcanic tuff with bimodal permeability distribution.…”

Section: The Aquifer Analogue Approachmentioning

confidence: 99%

Investigation of the effects of fractured porous media on hydraulic tests—an experimental study at laboratory scale using single well methods

Leven

Sauter

Teutsch³

et al. 2004

Journal of Hydrology

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“…Americium and europium are likely to bepresent in carbonated sediments, such as the Hanford formation, as trivalent cations. In their soluble forms, both are strongly sorbed by phyllo-and tecto-silicates Bish et al, 2000;Nagasaki et al, 1997;Vandergraaf et al, 1997 , although the sorption mechanism is likely to be di erent than that of Cs + and strongly a ected by p H and carbonate concentration Clark et al, 1998;Luckscheiter and Kienzler, 2001 . Interaction of EuIII and AmIII to speci c aluminosilicates has not been studied in detail.…”

Section: Selection Of Cs Eu and Ammentioning

confidence: 99%

Colloid-Facilitated Transport of Radionuclides through the Vadose Zone

Flury¹,

Harsh²,

Zachara³

et al. 2003

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2.2 Budget Justi cation 2.2.1 Washington State University 1. Personnel Principal Investigator. One month summer salary per year for the two PIs is requested. Postgraduate Researcher. Salary for one postgraduate researcher per year is requested. The postgraduate researcher will be responsible for analysis and modeling of experimental data, and will assist in the design and performance of the experiments. Graduate Students. Salary for two graduate students at the Ph.D. level is requested.

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Transport of radionuclides in natural fractures: some aspects of laboratory migration experiments

Cited by 30 publications

References 2 publications

Dissolved and Colloidal Transport of Cesium in Natural Discrete Fractures

Dissolved and Colloidal Transport of Cesium in Natural Discrete Fractures

Investigation of the effects of fractured porous media on hydraulic tests—an experimental study at laboratory scale using single well methods

Colloid-Facilitated Transport of Radionuclides through the Vadose Zone

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