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. Author manuscript; available in PMC: 2015 Jan 22.
Published in final edited form as: Ind Eng Chem Res. 2013 Nov 26;53(3):1130–1142. doi: 10.1021/ie403353g

Table 1.

Determination of iron species and total iron from polymerization in solution of AA (2.8 M at pH 3.0; T0 = 22–25 °C) and Ion Exchange with FeCl2·4H2O (3.6 ± 0.04 mM; pH = 4.9); Area of membranes = 13.2 cm2.

Iron species
Total Fe in hydrogel from polymerization 9.2 ± 1.1 mg/g PAA
Total Fe in membrane from polymerization 3.6 ± 0.3 mg/g PAA
    Fe3+ in membrane from polymerization 91.7%
    Fe2+ in membrane from polymerization 8.3%
Total Fe in hydrogel from ion exchange 457.5 ± 8.1 mg/g PAA
Total Fe in membrane from ion exchange 131.1 ± 3.1 to 428.3± 4.2 mg/g PAA