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groundwater flow fractionation

Asymmetrical flow field-flow fractionation coupled with a

01/12/2017· Field-flow fractionation (FFF) is a separation technique useful for analysis of nanoparticles and macromolecules according to their diffusion coefficients (or

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Estimation of groundwater temperature from 18O

01/10/2019· This research is focused on estimation of groundwater temperature from 18 O fractionation. • For an inclined gently dipping confined aquifer heat budget increases as moving down dip. • Depending on vibrational frequency and bond strength of 16 O– 18 O and 16 O– 16 O it is likely, that 18 O will tend to concentrate at lower temperature regime. • Therefore, 18 O absolute abundance

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Comparative study of granitic and sedimentary

Comparative study of granitic and sedimentary groundwater colloids by flow-field flow fractionation coupled with ICP-MS. T. Saito * a, T. Hamamoto b, T. Mizuno c, T. Iwatsuki d and S. Tanaka† b a Advanced Science Research Center, Japan Atomic Energy Agency, 2-4 Shirakata Shirane, Tokai-mura, Ibaraki 319-1195, Japan.

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Rare Earth Element Concentrations, Speciation, and

Groundwater samples were collected in two different types of aquifers (i.e., Carrizo sand aquifer, Texas and Upper Floridan carbonate aquifer, west-central Florida) to study the concentration, speciation, and fractionation of rare earth elements (REE) along the groundwater flow path in each system. Major solutes and dissolved organic carbon (DOC) were also measured in these groundwaters. In

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Rare Earth Element Concentrations and Fractionation

Groundwater samples were collected in two different types of aquifer (i.e., Carrizo Sand Aquifer, Texas and Upper Floridan carbonate Aquifer, west-central Florida) to study the concentrations, fractionation, and speciation of rare earth elements (REE) along groundwater flow paths in each aquifer. Major solutes and dissolved organic carbon (DOC) were also measured in these groundwaters.

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Comparative study of granitic and sedimentary

Size distribution and elemental compositions of colloids in granitic and sedimentary deep groundwater were determined by flow-field flow fractionation (Fl-FFF) combined with inductively coupled plasma mass spectrometry (ICP-MS). Great care was taken to examine colloids over a wide range of size and to detect trace elements associated with them. In the granitic groundwater organic colloids and

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Rare Earth Element Concentrations, Speciation, and

Groundwater samples were collected in two different types of aquifers (i.e., Carrizo sand aquifer, Texas and Upper Floridan carbonate aquifer, west-central Florida) to study the concentration, speciation, and fractionation of rare earth elements (REE) along the groundwater flow path in each system. Major solutes and dissolved organic carbon (DOC) were also measured in these groundwaters. In

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Rare Earth Element Concentrations and Fractionation

Groundwater samples were collected in two different types of aquifer (i.e., Carrizo Sand Aquifer, Texas and Upper Floridan carbonate Aquifer, west-central Florida) to study the concentrations, fractionation, and speciation of rare earth elements (REE) along groundwater flow paths in each aquifer. Major solutes and dissolved organic carbon (DOC) were also measured in these groundwaters.

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Rare earth element fractionation and concentration

@article{osti_20000932, title = {Rare earth element fractionation and concentration variations along a groundwater flow path within a shallow, basin-fill aquifer, southern Nevada, USA}, author = {Johannesson, K H and Farnham, I M and Guo, C and Stetzenbach, K J}, abstractNote = {Rare earth element (REE) concentrations were measured in 5 well water samples and 3 springs located along a

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Comparative study of granitic and sedimentary

Size distribution and elemental compositions of colloids in granitic and sedimentary deep groundwater were determined by flow-field flow fractionation (Fl-FFF) combined with inductively coupled plasma mass spectrometry (ICP-MS). Great care was taken to examine colloids over a wide range of size and to detect trace elements associated with them. In the granitic groundwater organic colloids and

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Isotopic Fractionation of U in Rocks Reflecting Redox

Isotopic Fractionation of U in Rocks Reflecting Redox Conditions around a Groundwater Flow Route Volume 663 Juhani Suksi, Kari Rasilainen

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Rare Earth Element Concentrations, Speciation, and

Rare Earth Element Concentrations, Speciation, and Fractionation along Groundwater Flow Paths: The Carrizo Sand (Texas) and Upper Floridan Aquifers March 2006 DOI: 10.1007/1-4020-3234-X_9

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Characterization of Suboxic Groundwater Colloids Using a

Anoxic groundwater colloid properties were measured using a minimally perturbing procedure for sampling, processing, and analysis. Analytical methods included atomic force microscopy (AFM), flow field flow fractionation (FlFFF), and transmission and scanning electron microscopy (TEM and SEM). Shallow groundwater samples showed abundant iron rich nanoparticles (NP) with diameters of

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Isotopic fractionation by diffusion in groundwater

Analyses of transport in heterogeneous systems delimit the viable range of isotopic fractionation by diffusion in groundwater. Results show that diffusion can result in similar degrees of depletion and enrichment of isotopically heavy solutes during transport in heterogeneous systems with significant diffusion rate-limited mass transfer between fast- and slow-flow zones. Additional analyses

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Isotopic investigation of recharge to a regional

OSTI.GOV Conference: Isotopic investigation of recharge to a regional groundwater flow system, Great Basin, NV

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Microbial in situ degradation of aromatic hydrocarbons in

Although indane and indene showed decreasing concentrations downstream of the groundwater flow path, suggesting microbial degradation, their carbon isotope ratios remained constant. As the physical properties of these compounds are similar to those of BTEX compounds, the constant isotope values of indane and indene indicated that microbial degradation did not lead to isotope fractionation of

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