Equilibrium studies in natural fluids: A chemical speciation model for the major constituents of sea water

Abstract

The speciation of CI‒, OH‒ and SO42 in synthetic sea water has been studied by Potentiometric measurements (pH-metric and ISE-Na methods) and by literature data analysis, using a well tested complex formation model. Stability constants, together with distribution of hypothesised species in synthetic sea water, as a function of temperature and salinity, are reported. The speciation model proposed in this work is discussed on the basis of chemical and statistical considerations. Comparison with some literature sea water models is given. © 1994 Taylor and Francis Group, LLC.