| Abstrakt: |
Abstract: When investigating contaminant transport in groundwater aquifers, it is important to take into account the aqueous-phase density. In order to get the required information, the knowledge of functional relationship between the contaminant concentration and the aqueous-phase density is necessary. In this paper, the relationship was found for ten solutes commonly occurring in groundwater, namely CaCl2, KCl, K2CO3, K2SO4, KHSO4, Na2CO3, NaCl, Na2SO4, MgSO4 and MgCl2. Linear, parabolic and power functions have been applied and several quantities (mass fraction, molality, molarity, molar fraction, ionic strength and mass-volume concentration) have been considered in order to get the best accuracy of the obtained relationship. Finally, the problem of multicomponent solutions was solved. A new method of density determination was developed which makes use of known single-component relationships. The method was tested and its efficiency was verified and documented. |
