The water activities of the systems MSO4 + H2O (M = Mn, Co, Ni, Cu, Zn) at higher temperatures are important for heavy metal hydrometallurgy processing of these metals. This paper reports water activity data for these binary systems at 323.15 K from isopiestic measurements. The reliability of the apparatus was verified by determination of the water activities of the test systems at 298.15 K and also two reference systems CaCl2 + H2O and H2SO4 + H2O at 298.15 K and 323.15 K. The results obtained agree well with literature data, with maximum relative deviations of the water activities for the reference systems of less than 0.032 % at 298.15 K and 0.062 % at 323.15 K respectively. The water activities for the MSO4 + H2O (M = Co, Ni, Cu, Zn) systems at 323.15 K were found to be approximately the same up to high concentrations, but were significantly lower than the MnSO4 + H2O system. The relative deviation of isopiestic molality of parallel samples in each experimental run is better than 0.2 %. The measured water activities reported in this work can be used to parametrize thermodynamic models of heavy-metal hydrometallurgical processes.
Compounds
#
Formula
Name
1
H2O
water
2
MnO4S
manganese(II) sulfate
3
CoO4S
cobalt(II) sulfate
4
NiO4S
nickel monosulfate
5
CuO4S
copper sulfate
6
O4SZn
zinc sulfate
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.