Earliest Results in the Use of Activated Composite Membranes for the Transport of Silver Ions from Aqueous Solutions

Table 2

Silver flux from ACM to stripping phase according the thiourea concentration. ACM prepared with DTPA 0.75 mol L⁻¹. Feed phase with Ag 4.64 × 10⁻⁴ mol L⁻¹ in HNO₃ 0.1 mol L⁻¹.

Thiourea in stripping solution (mol L^−1 in H2SO4 2 mol L^−1)	Ag flux (×10^−6 mol cm^−2 s^−1)
0.0	NO^a
0.1	NO^b
0.3	0.37 (5.71)
0.6	0.58 (11.4)
1.0	1.1 (1.98)

Percentage of standard deviation in parenthesis. NO = not observed. LOD <1.65 × 10⁻⁷ mol L⁻¹; NO = Not observed. LOD <2.40 × 10⁻⁷ mol L⁻¹.