The name is absent



Chapter4

Table 4.6 Effective diameter of the hydrated ions [26]

Ion

a (nm)

Ion

a (nm)

H+

0.9

SiO44'

0.4

OH

0.35

SO42'

0.4

HCO3'

0.4

H2L'

0.35

CO32'

0.45

HL2'

0.45

*HSiO3'

0.4

0.5

*SiO32'

0.4

Ca2+

0.6

H3SiO4'

0.4

Mg2+

0.8

H2SiO42'

0.4

**CaL'

0.35

HSiO43'

0.4

**MgL'

0.35

*Data obtained by the estimation using carbonate and sulfate ions as reference.

** Data obtained by the estimation using H2L' ion as reference. L represents
citrate.

Table 4.7 Calculated activity coefficients of ions in synthetic brine (1=0.0478 M)

Ions

________Y________

Ion

________Y________

H+

0.935

SiO44'

0.250

OH

0.915

SO42'

0.707

HCO3'

0.917

H2L'

0.917

CO32'

0.714

HL2'

0.715

HSiO3'

0.917

I?

0.478

SiO32'

0.707

Ca2+

0.732

H3SiO4'

0.917

Mg2+

0.753

H2SiO42'

0.707

CaL'

0.915

HSiO43'

0.459

MgL'

0.915

117



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