Table 8.

Imogolite – CaCl₂ electrolyte surface charge density by experimental electrophoretic mobility adjustment.

imogolite in contact with 1.0 $\text{mM}$ of CaCl2 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}}$$\times {\mathbf{10}}^{\mathbf{3}}$ $\mathbf{C}/{\mathbf{m}}^{\mathbf{2}}$
5.3	4.05	4.06	58.93	59.09	8.12
6.0	3.71	3.72	53.97	54.14	7.21
6.8	3.24	3.25	47.14	47.30	6.07
7.0	3.16	3.16	45.90	45.96	5.86
7.8	2.43	2.43	35.37	35.37	4.34
8.0	2.33	2.33	33.82	33.87	4.13
8.9	2.43	2.42	35.36	35.22	4.32
9.5	2.56	2.55	37.21	37.07	4.57
10.0	2.65	2.64	38.45	38.45	4.76
10.9	2.86	2.86	41.54	41.61	5.21
imogolite in contact with 5.0 $\text{mM}$ of CaCl2 electrolyte
pH	* ${\mathrm{\upsilon }}_{\text{elec}}$$\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}}$ $\mathbf{C}/{\mathbf{m}}^{\mathbf{2}}$
5.0	4.35	4.33	63.20	62.98	19.89
5.9	3.97	3.96	57.64	57.67	17.58
6.9	3.60	3.60	52.39	52.38	15.43
7.6	2.97	2.97	43.11	43.21	12.12
7.9	2.54	2.54	36.93	36.97	10.13
8.2	2.77	2.77	40.33	40.33	11.18
8.6	2.99	2.98	43.43	43.45	12.20
9.2	3.29	3.28	47.77	47.80	13.71
9.4	3.61	3.61	52.41	52.51	15.47
10.5	3.71	3.72	53.97	54.15	16.12

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