Figure 3.
XRD (a) of microspheres and Co2+ adsorption capacity of different formulations (b) (adsorption condition: t = 24 h, T = 25 °C, pH = 6.4, dosage = 0.04 g; the red, blue, and purple marked n(M2O)/n(Al2O3) = 1, 1.5, and 2, respectively).
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