Chapter 4
M NaCl brine adding CaCI2 or MgCI2 at pH 6.5 were measured.
-AO' +Ca2+ z≠ -AOCa+, -AO +Mg2+ -AOMg+ [4.37]
= [ AOCa+] = [ AOCa+]
'^ [A0]α,(Ca2*) [Aθ]a√Ca')exp(-¾
kι
= [AOMg+] = [A0Mg+]
M8 [a0^MmS2+) [AO⅛(Mg2+)exp(-¾
kT
σ0(Ca) = e([AOH+]-[AO']-[B']+[AOCa+]) [4.40]
σ0 (Mg) = e([AOH+] - [AO ] - [B' ]+[A0Mg+ ]) [4.41 ]
Here Kca and Kwg are surface adsorption equilibrium constants.
Figure 4.26 Kaolinite zeta potential in 0.05 M NaCI brine adding MgCI2 at pH 6.5
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