CHAPTER 8 . Speciation of Metals in Natural Waters
205
Table 8.3. Comparison of measured and calculated activity coefficients of ions in sea water at 25 DC and
S = 35 (based on reI = 0.666) (Millero and Pier rot 1998)
Ion
Measured
Calculated
L' 1
Reference
H+
0.590
0.581
0.009
Khoo et al. (1977a)
0.589
0.008
Dickson (1990b); Campbell et al. (1993)
Na+
0.668
0.664
0.004
Johnson and Pytkowicz (1981)
0.670
0.006
Gieskes (1966)
0.678
0.014
Platford (1965)
K+
0.625
0.619
0.006
Whitfield (1975)
NH:
0.616
0.624
-0.005
Khoo et al. (1977b)
0.592
0.032
Johansson and Wed borg (1980)
Mg2+
0.240
0.219
0.021
Thompson (1966)
Ca 2 +
0.203
0.214
-0.G11
Mucci (1983)
0.180
-0.034
Culberson et al. (1978)
5r 2 +
0.190
0.208
-0.018
Culberson et al. (1978)
F
0.296
0.309
-0.013
Culberson et al. (1970)
CI
0.666
0.666
0
Assigned value
OH
0.255
0.263
-0.008
Millero (1995)
0.242
-0.021
Hansson (1972)
0.254
-0.009
Culberson and Pytkowicz (1973)
0.254
-0.009
Dickson and Riley (1979a)
H5
0.617
0.661
-0.044
Yao and Millero (1995)
HCO~
0.570
0.574
-0.004
Mehrbach et al. (1973)
0.587
0.013
Hansson (1973)
0.586
0.012
Goyet and Poisson (1989)
0.583
0.009
Roy et al. (1993)
H50~
0.782
0.770
0.012
Dickson (1990b)
B(OH)~
0.390
0.384
0.006
Dickson (1990a)
0.419
0.Q35
Hansson (1973)
0.398
0.014
Byrne and Kester (1974)
0.351
-0.033
Millero et al. (1993)
HlO~
0.453
0.514
-0.061
Yao and Millero (1995)
0.492
-0.022
Dickson and Riley (1979b)
0.352
-0.162
Kester and Pytkowicz (1967)
50:0.104
0.102
0.002
Khoo et al. (1977)
0.101
-0.001
Culberson et al. (1970)
0.112
0.010
Whitfield (1975)
0.121
0.019
Platford and Dafoe (1965)
0.121
0.019
Culberson et al. (1978)