论文信息 - CARBON ISOTOPE FRACTIONATION BETWEEN DISSOLVED BICARBONATE AND GASEOUS CARBON-DIOXIDE

CARBON ISOTOPE FRACTIONATION BETWEEN DISSOLVED BICARBONATE AND GASEOUS CARBON-DIOXIDE

Abstract The fractionation of the stable carbon isotopes between gaseous CO 2 and dissolved bicarbonate has been measured from 5 to 25°C by a method of high precision. Additional measurements of lower precision were made up to 125°C. The results are well represented by the relation: e b (g) = −(9.483 ± 0.22)10 3 /T+(23.89 ± 0.75)‰ . Using earlier values for the equilibrium between gaseous and dissolved CO 2 , the isotope fractionation between dissolved HCO 3 − and dissolved CO 2 is: e b (a) = −(9.866 ± 0.23)10 3 /T+(24.12 ± 0.78)‰ . Tables are given for the carbon isotope fractionation in the system CO 2 (g)-CO 2 (aq)-HCO 3 − at normal temperatures.

W. G. Mook | W. Mook | J. C. Bommerson | W. H. Staverman

[1] I. Wendt. Fractionation of carbon isotopes and its temperature dependence in the system CO2-Gas-CO2 in solution and HCO3-CO2 in solution , 1968 .

[2] W. G. Mook,et al. Isotopic fractionation between gaseous and dissolved carbon dioxide , 1970 .

[3] J. McCrea. On the Isotopic Chemistry of Carbonates and a Paleotemperature Scale , 1950 .

[4] H. Thode,et al. CARBON-13 ISOTOPE EFFECTS IN SYSTEMS CONTAINING CARBON DIOXIDE, BICARBONATE, CARBONATE, AND METAL IONS , 1965 .

[5] A. J. Ellis. The system Na (sub 2CO 3 -NaHCO 3 -CO 2 - H 2 O at temperatures up to 200 degrees , 1959 .

[6] W. G. Deuser,et al. Carbon Isotope Fractionation in the System CO2(gas)—CO2(aqueous)—HCO3−(aqueous) , 1967, Nature.

[7] W. Mook. Geochemistry of the stable carbon and oxygen isotopes of natural waters in the Netherlands , 1968 .

[8] J. Vogel,et al. Carbon isotope fractionation during the precipitation of calcium carbonate , 1970 .

[9] J. Edmond,et al. On the calculation of the degree of saturation of sea water with respect to calcium carbonate under in situ conditions , 1970 .

[10] A. J. Ellis. The solubility of carbon dioxide in water at high temperatures , 1959 .

[11] A. Walker,et al. EQUILIBRIUM IN SOLUTIONS OF ALKALI CARBONATES , 1927 .

[12] W. Mook,et al. The measuring procedure and corrections for the high-precision mass-spectrometric analysis of isotopic abundance ratios, especially referring to carbon, oxygen and nitrogen , 1973 .