Temperature and pH Effects on Sorption Properties of Subseabed Clay

Kenna, B.T.

doi:10.1007/978-1-4684-4040-9_62

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…Other researchers, such as Inch and Killey (1 987) and Tadao and Tadatoshi (1 988), have found that Sr Kds are strongly correlated with sedimentary surface area. Furthermore, researchers have indicated that pH (Kenna, 1980;Sibley and others, 1982;and Qingzhong and Guangyu, 1989), clay content (Tadao and Tadatoshi, 1988), and salt concentrations (Rafferty and others,198 1) all have an effect on Sr Kds.…”

Section: Previous Investigationsmentioning

confidence: 99%

The Use of Chemical and Physical Properties for Characterization of Strontium Distribution Coefficients at the Idaho National Engineering and Environmental Laboratory, Idaho

Rosentreter¹,

Nieves²,

Kalivas³

et al. 1999

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Section: Previous Investigationsmentioning

confidence: 99%

The Use of Chemical and Physical Properties for Characterization of Strontium Distribution Coefficients at the Idaho National Engineering and Environmental Laboratory, Idaho

Rosentreter¹,

Nieves²,

Kalivas³

et al. 1999

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“…Other researchers, such as Inch and Killey (1987) and Tadao and Tadatoshi (1988), have found that Sr K^s are strongly correlated with sedimentary surface area. Furthermore, researchers have indicated that pH (Kenna, 1980;Sibley and others, 1982;and Qingzhong and Guangyu, 1989), clay content (Tadao and Tadatoshi, 1988), and salt concentrations (Rafferty and others, 1981) (Robertson and Leckie, 1991;Schnoor, 1996). In the second approach, bulk-characteristic correlations of either the solid or aqueous phase, or both, were used to predict the sorptive characteristics of a system (Robertson and Lechie, 1991;Rosentreter and others, 1997 …”

Section: Previous Investigationsmentioning

confidence: 99%

The use of chemical and physical properties for characterization of strontium distribution coefficients at the Idaho National Engineering and Environmental Laboratory, Idaho

Rosentreter¹,

Nieves²,

Kalivas³

et al. 1999

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For temperature, degrees Celsius (°C) can be converted to degrees Fahrenheit (°F) by using the formula °F = (1.8)(°C) + 32.Abbreviated units used in report: Kd (distribution coefficient), mg/L (milligrams per liter), mL (milliliter), mL/g (milliliters per gram), mg/kg (milligrams per kilogram), ^is/cm (microsiemens per centimeter) at 25°C, m2/g (meters squared per gram). IV The Use of Chemical and Physical Properties for Characterization of Strontium Distribution Coefficients at the Idaho National Engineering and Environmental Laboratory, IdahoBy Jeffrey J. Rosentreter, Reinaldo Nieves, John Kalivas, Joseph P. Rousseau, and Roy C. Bartholomay AbstractThe U.S. Geological Survey and Idaho State University, in cooperation with the U.S. Department of Energy, conducted a study to determine strontium distribution coefficients (Kds) of surficial sediments at the Idaho National Engineering and Environmental Laboratory (INEEL). Batch experimental techniques were used to determine experimental Kds of 20 surficial-sediment samples from the INEEL. The Kds describe the distribution of a solute between the solution and solid phase. Kds of the 20 surficial-sediment samples ranged from 36 to 275 milliliters per gram. Many chemical and physical properties of both the synthesized aqueous solution and sediments used in the experiments also were determined. The following solution properties were determined: initial and equilibrium concentrations of calcium, magnesium, and strontium; pH and specific conductance; and initial concentrations of potassium and sodium. Sediment properties determined were grain-size distribution, mineralogy, whole-rock major oxide, strontium and barium concentrations, and Brunauer-Emmett-Teller surface area. Multivariate-regression techniques were used to identify which of these variables or set of variables could best predict the strontium Kd values. Partial leastsquares regression was used to fit these data to an empirical model that could be used to predict strontium Kds of surficial sediments at the INEEL. The best-fit model was obtained using a four-variable data set consisting of surface area, manganese oxide concentration, specific conductance, and pH. Application of the model to an independent split of the data resulted in an average relative error of prediction of 20 percent and a correlation coefficient of 0.921 between predicted and observed strontium Kds. Chemical and physical characteristics of the solution and sediment that could successfully predict the Kd values were identified. Prediction variable selection was limited to variables which are either easily determined or have available tabulated characteristics. The selection criterion could circumvent the need for time-and labor-intensive laboratory experiments and provide an alternate faster method for estimating strontium Kds.

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“…The effect of pH and temperature on the Sorption of cesium, strontium, barium, and europium was investigated by Kenna (1981), who also used batch equilibration techniques. Samples of smectite-rich sediment, obtained from core LL44-GPC2 taken at 30°20.9'N, 157°50.85'W, were contacted with 0.68 N NaCl solutions containing a single nuclide of interest.…”

Section: Sorption Mechanisms and Equilibriamentioning

confidence: 99%

Geochemical studies with abyssal Red clays

Erickson

Seyfried

Heath

et al. 1984

Marine Geotechnology

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Pertinent geochemical phenomena required to assess the feasibility of emplacing high-level radioactive waste in subseabed formations are being identified and experimentally investigated. The geologic formation selected for study is the abyssal red clay. Investigations of phenomena occurring in the sediment beyond the hydrothermal environment associated with the waste have focused on sorption equilibria, solution chemistry of the actinides, and radionuclide diffusion experiments. Most data from the diffusion experiments are consistent with the experimentally observed sorption equilibria. Studies of processes occurring in the hydrothermal environment near the canister have addressed heat-induced sediment-seawater interactions and their effects on canister, waste form, and radionuclide source term. Significant changes in oxidation potential and pH have been found in the hydrothermal environment and are related to variations in temperature and mineralogy. Studies of processes occurring near the sediment-seawater interface have emphasized the establishment of a data base for evaluating the geochemical, biological, and fluid-mechanical mechanisms determining radionuclide fluxes across that interface.

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Temperature and pH Effects on Sorption Properties of Subseabed Clay

Cited by 5 publications

References 3 publications

The Use of Chemical and Physical Properties for Characterization of Strontium Distribution Coefficients at the Idaho National Engineering and Environmental Laboratory, Idaho

The Use of Chemical and Physical Properties for Characterization of Strontium Distribution Coefficients at the Idaho National Engineering and Environmental Laboratory, Idaho

The use of chemical and physical properties for characterization of strontium distribution coefficients at the Idaho National Engineering and Environmental Laboratory, Idaho

Geochemical studies with abyssal Red clays

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