Chemical Modeling of Aqueous Systems II by Daniel C. Melchior, R. L. Bassett

By Daniel C. Melchior, R. L. Bassett

Chemical Modeling in Aqueous structures

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8. 9. 10. 11. 12. 13. 14. 15. 16. 17. A. J. Amer. Chem. Soc. 1948, 70, 1870-1878. ; and Thrailkill, J. , ed. Amer. Chem. Soc. Symp. Series 1979, vol 79; pp. 857-892. T. Electrochim. Acta 1964, 9, 1545-1547. C. Amer. J. Sci. 1981, 281, 1249-1516. Friedman, H. L. Ionic Solution Theory 1962; Intersicience Publishing, New York. L. Ann. Rev. Phys. Chem. 1981, 32, 179-204. J. Appl. Geochem. 1988, 3, 27-35. S. J. Phys. Chem. 1973, 77, 268-277. S. , CRC Press, New York; pp. 157-208. H. Geochim. Cosmochim.

31 ) (4) where yi is the individual-ion activity coefficient of species i, Z{ is the charge of the species, A andi? 3287 at 25°C, I is ionic strength, a\ is the ion-size parameter, b( is an ion-specific parameter. ; ACS Symposium Series; American Chemical Society: Washington, DC, 1990. 392z 2 + A ( i + i . 2 vf)] +0,1+6* [ l e : m ^(1+2 v^-2I)] + I Ci 2 (5 ) where a;, b{, and C{ are ion-specific parameters. It may be convenient to use Equation 3 because WATEQ does not have the option to use Equation 5.

Ch003 Li+ = L i 2 Li+ + H 0 = LiOH + H 2 4 2 Li+ + S0 -2 = Li S0 Mg+2 = Mg+2 2 4 Mg +2 0. 64 4 0. 75 6 0. 81 6 0. 0. 78 6 0. 97 6 Li S0 4 0. 58 6 Fit 2 0. 18 6 0. 44 6 0. MgS0 0. 30 6 0. 84 6 0. MnS0 0. 66 6 0. 87 6 Na S0 4 0. 07 6 2 S Mn+2 + 3 4 M S0 - 2 4 2 n S 0 4 = Mn(S0 ) 4 2 2 Na+ = Na+ 0. 70 4 0. 10 6 0. 95 6 0. NiS0 4 Pb+2 = Pb+2 0. 2 0. 5 0. 12 0. 88 S0 -2 = S0 -2 0. 040 Fit 0. 26 Fit 0. 20 6 0. 5 4 2 2 2 2 3 2 2 4 3 2 2 4 4 2 4 0. 121 - WATEQ 0. 0299 2 0. 12 6 0. 85 6 0. 0 4 0. 5 4 Mn+ + 3 CI" = MnCI 2 2 WATEQ 4 0.

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