Table 9.

Imogolite – MgCl₂ electrolyte surface charge density by experimental electrophoretic mobility adjustment.

imogolite in contact with 1.0 $\text{mM}$ of MgCl2 electrolyte
pH	* ${\mathrm{\upsilon }}_{\text{elec}}$$\times {\mathbf{10}}^{\mathbf{8}}$${\mathbf{m}}^{\mathbf{2}}/\mathbf{V}\bullet {\mathbf{s}}^{-\mathbf{1}}$	† ${\mathrm{\upsilon }}_{\text{elec}}$$\times {\mathbf{10}}^{\mathbf{8}}$${\mathbf{m}}^{\mathbf{2}}/\mathbf{V}\bullet {\mathbf{s}}^{-\mathbf{1}}$	*$\mathrm{\zeta }$mV	†$\mathrm{\zeta }$mV	† ${\mathit{\rho }}_{\mathbf{s}}$$\times {\mathbf{10}}^{\mathbf{3}}$ $\mathbf{C}/{\mathbf{m}}^{\mathbf{2}}$
5.3	3.37	3.35	49.01	48.82	6.28
6.1	2.46	2.45	35.69	35.65	4.36
6.7	2.31	2.31	33.52	33.61	4.09
7.6	1.90	1.90	27.62	27.62	3.33
7.7	1.88	1.87	27.31	27.29	3.29
8.1	1.79	1.79	26.07	26.15	3.15
8.2	1.64	1.65	23.90	24.01	2.89
8.8	1.54	1.54	22.35	22.42	2.70
9.2	1.71	1.70	24.82	24.84	2.99
9.5	1.88	1.87	27.30	27.21	3.28
imogolite in contact with 5.0 $\text{mM}$ of MgCl2 electrolyte
pH	* ${\mathrm{\upsilon }}_{\text{elec}}$$\times {\mathbf{10}}^{\mathbf{8}}$${\mathbf{m}}^{\mathbf{2}}/\mathbf{V}\bullet {\mathbf{s}}^{-\mathbf{1}}$	† ${\mathrm{\upsilon }}_{\text{elec}}$$\times {\mathbf{10}}^{\mathbf{8}}$${\mathbf{m}}^{\mathbf{2}}/\mathbf{V}\bullet {\mathbf{s}}^{-\mathbf{1}}$	*$\mathrm{\zeta }$mV	†$\mathrm{\zeta }$mV	† ${\mathit{\rho }}_{\mathbf{s}}$$\times {\mathbf{10}}^{\mathbf{3}}$ $\mathbf{C}/{\mathbf{m}}^{\mathbf{2}}$
5.3	3.20	3.20	46.49	46.53	13.19
6.4	2.50	2.49	36.29	36.32	9.89
6.9	2.03	2.02	29.49	29.45	7.90
7.3	1.92	1.91	27.94	27.86	7.46
7.8	1.71	1.70	24.86	24.80	6.63
8.1	1.54	1.53	22.38	22.33	5.97
8.6	1.22	1.22	17.74	17.73	4.76
9.1	1.52	1.51	22.08	21.99	5.88
9.8	2.09	2.09	30.45	30.37	8.16
10.2	2.33	2.33	33.85	33.96	9.19

Note: *Experimental results, Arancibia – Miranda et al. [8]. †Numerical results, present work.