Fig. 5. Atomic force micrographs of the precipitates formed at 1 M NH₄H₂PO₄, 10^-2 M Al, pH 4.0, and Fe(II)/Al molar ratio = 0 after aging for (a) 1 d, (b) 1 wk, (c) 2 wk, (d) 3 wk, and (e) 4 wk.

Return to article