Other
Scientific paper
Apr 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988gecoa..52..807b&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 52, Issue 4, pp.807-811
Other
5
Scientific paper
Aqueous hydrogen sulphide solubilities have been determined for distilled water and 1-5 m NaCl brines at temperatures of 25°-95°C at atmospheric pressure. From the experimental data, a set of polynomial equations has been derived which can be used to calculate H 2 S solubilities for any temperature up to 95 °C and NaCl content up to 5 molal. The results can be applied to the behavior of H 2 S in natural systems ranging from normal groundwaters to low-temperature geothermal brines; they also allow more accurate calculation of metal sulphide solubilities in acid solutions below 100°C. From the solubility data, activity coefficients of H 2 S have been calculated. For a given gas and temperature, the relation between activity coefficient values n and the true ionic strength I is given by the slope b , n . For H 2 S b , n is 0.0745 for the 25°-80°C data; values increase to 0.109 at 95°C. H 2 S solubilities were also calculated for our experimental conditions using an equation presented by and (1985) which is based on data obtained by (1981) under higher P - T conditions. Calculated values generally show good agreement with our measured results.
Anderson Malcolm G.
Barrett T. J.
Lugowski J.
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