Enhanced Adsorption of Selenium Ions from Aqueous Solution Using Iron Oxide Impregnated Carbon Nanotubes

Table 3

Adsorption capacity of different materials for adsorption of selenium from water.

Type of adsorbent	Experimental conditions	Max. adsorption capacity (mg/g)	Reference
Iron oxide nanoparticle	pH = 4, initial concentration = 0.01 mg/L	15.1	[8]
Chitosan–clay composite	pH = 4, initial concentration = 0.1 mg/L, = 30°C	18.4	[15]
Iron-coated GAC	pH = 2–8, initial concentration = 2 mg/L, = 45°C	2.89	[38]
Nanocrystalline hydroxyapatite	pH = 5, initial concentration = 0.01 mg/L, = 30°C	1.94	[39]
Aluminum oxide coated sand	pH = 4.80, initial concentration = 1.2 mM	1.08	[40]
Sulfuric acid treated rice husk	pH = 1.5, initial concentration = 100 mg/L = 45°C	40.92	[41]
Iron oxide impregnated CNTs	pH = 6, CNTs dosage = 10 mg and initial concentration = 1 ppm	111	This study