Abstract
The solubility of barium sulfate in diluted Na2SO4NaNO3 solutions and seawater with 35 salinity at 22C was experimentally studied. Value of the thermodynamic solubility product of barium sulfate = (7.570.87)1011 was ascertain. It was shown that equilibrium concentration of dissolved barium in seawater is equal 30.7 g/l and water layer of the World Ocean is in the state of low undersaturation for BaSO4. Values of the ionic-mean activity coefficient of BaSO4, total activity coefficient and part of free ions of Ва 2+ in seawater, equal 0.108, 0.131, and 0.59, respectively, were determined according to the experimental data.
Published Version
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