海水成分の溶存形態

抄録

In this paper, the distribution of dissolved species in sea water was calculated by using the known stability constants involving Ca²⁺, Mg²⁺, Na⁺, K⁺, SO₄^2-, CO₃^2-, HCO₃^-, PO₄^3-, HPO₄^2-, H₂PO₄^-, and F^-. As a first method, the calculation was carried out by solving the equations of multi-components using the stability constants in salt solution. As a second method, the calculation was done by using the stability constants in zero of ionic strength corrected by activity coefficients. The activity coefficients were estimated from Kielland's formula. Most of the distribution gained by the second method approximated to those values obtained by Garrels.
Phosphate was strongly complexed, and about 90 percent of the phosphate was dissolved as HPO₄^2-and paired species of HPO₄^2- to various cations. The remaining about 10 percent of phosphatg existed in the form of CaH₂PO⁴⁺. Nearly a half of F was paired with Mg.