Biosynthesis and Characterization of Iron Nanoparticles for Effective Adsorption of Cr(VI)

Table 4

Comparison of results obtained in this study for the adsorption of Cr(VI) with those of other adsorbents.

Adsorbent	pH	Langmuir isotherm model		References
		Q° (mg/g)	b (L/mg)
Multiwalled carbon nanotubes	4.28	1.177	0.526	[27]
Commercial hematite [α-Fe2O3]	8	2.299	0.388	[4]
Commercial activated carbon-Fe	2.0–3.0	1.680	1.21	[28]
Olive oil factory wastes	2.0	18.69	0.0554	[5]
Hydrous titanium(IV) oxide (CHTO)	1.5	27.11	0.2766	[29]
Activated carbon from rubber wood	2.0	65.78	0.2443	[24]
Graphene hybridized Fe3O4 nanoparticles	—	78.50	0.0006	[26]
L. speciosa bark embedded magnetic iron oxide nanoparticles	2.05	434.78	11.499	[1]
FeNPs synthesized with aqueous E. japonica leaves extract	3.0	312.50	0.3950	This study