Fabrication of γ-Fe₂O₃ Nanoparticles by Solid-State Thermolysis of a Metal-Organic Framework, MIL-100(Fe), for Heavy Metal Ions Removal

Table 1

The adsorption capacities of some typical adsorbents.

As(III)		As(V)
Adsorbent	Adsorption capacity (mg g^−1)	Adsorbent	Adsorption capacity (mg g^−1)
Fe2O3 nanoparticles this study	62.9	-Fe2O3 nanoparticles this study	90.6
Activated carbon [4]	3.1	Titanium dioxide [12]	32.4
Granular iron hydroxide [3]	8.9	Fe-Mn mineral material [13]	14.7
Long-root Eichhornia crassipes [5]	1.3	GO-FeOOH [14]	73.2
Zr(IV)-loaded chelating resin [6]	49.1	Chitosan [15]	58.1
Iron oxide-hydroxide [7]	0.475	Fe2O3 CAHNs [16]	137.5
-Fe2O3 nanoparticles [8]	59.2	-Fe2O3 nanoparticles [17]	50
D-Fe [9]	29.1	-Fe2O3 flowers [18]	4.75
FeMn synergistic adsorbents [10]	9.3	Fe3O4 nanoparticles [19]	46.7
Mg-doped a-Fe2O3 nanoadsorbent [11]	10.6	Fe3O4 nanoparticles [20]	44.1