2/27/2024 0 Comments Chromium iii hydroxideThe Chemical Rubber Company, Cleveland (1972) Weast, R.C.: Handbook of Chemistry and Physics, 53rd ed. Lindsay, W.L.: Chemical Equilibria in Soils. Westinghouse Hanford Company, Richland (1996) Serne, R.J., Wyatt, G.A., Mattigod, S.V., Onishi, Y., Doctor, P.G., Bjornstad, B.N., Powell, M.R., Liljegren, L.M., Westsik, J., Aimo, N.J., Recknagle, K.P., Golcar, G.R., Miley, T.B., Holdren, G.R., Jeppson, D.W., Biyani, R.K., Barney., G.S.: Fluid Dynamic Particulate Segregation, Chemical Processes, Natural Ore Analog and Tank Inventory Discussions that Relate to the Potential for Criticality in Hanford Tanks. Sass, B.M., Rai, D.: The solubility of amorphous Cr(III)-Fe(III) hydroxide solid solutions. Rai, D., Sass, B.M., Moore, D.A.: Cr(III) hydrolysis constants and solubility of Cr(III) hydroxide. Rai, D., Moore, D.A., Hess, N.J., Rao, L., Clark, S.B.: Chromium(III) hydroxide solubility in the aqueous Na +-OH −-H 2PO − 4-HPO 2− 4-PO 3− 4-H 2O System: A thermodynamic model. Rai, D., Hess, N.J., Rao, L., Zhang, Z., Felmy, A.R., Moore, D.A., Clark, S.B., Lumetta, G.J.: Thermodynamic model for the solubility of Cr(OH) 3(am) in concentrated NaOH and NaOH-NaNO 3 solutions. Lumetta, G.J., Rapko, B.M.: Removal of chromium from Hanford tank sludges. Pacific Northwest National Laboratory, Richland (1993) Clean Option: An Alternative Strategy for Hanford Tank Waste Remediation, vol. 2. Swanson, J.L.: Detailed Description of First Example Flowsheet. Hrma, P., Vienna, J., Crum, J., Piepel, G., Mika, M.: Liquidus temperature of high-level waste borosilicate glasses with spinel primary phase. No other data on any Cr(III)-carbonato complexes are available for comparisons.įruchter, J.S.: In situ treatment of chromium-contaminated groundwater. The log 10 K° values of reactions involving these species were found to be −(19.07☐.41) and −(4.19☐.19), respectively. Calculations based on density functional theory support the existence of these species. Only two aqueous species are required to explain Cr(III)-carbonate reactions in a wide range of pH, CO 2(g) partial pressures, and bicarbonate and carbonate concentrations. The Pitzer ion-interaction approach was used to interpret the solubility data. A combination of techniques (XRD, XANES, EXAFS, UV-Vis-NIR spectroscopy, thermodynamic analyses of solubility data, and quantum mechanical calculations) was used to characterize the solid and aqueous species. Extensive studies on the solubility of amorphous Cr(III) hydroxide solid in a wide range of pH (3–13) at two different fixed partial pressures of CO 2(g) (0.003 or 0.03 atm.), and as functions of K 2CO 3 concentrations (0.01 to 5.8 mol⋅kg −1) in the presence of 0.01 mol⋅dm −3 KOH and KHCO 3 concentrations (0.001 to 0.826 mol⋅kg −1) at room temperature (22☒ ☌) were carried out to obtain reliable thermodynamic data for important Cr(III)-carbonate reactions. Chromium(III)-carbonate reactions are expected to be important in managing high-level radioactive wastes.
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