Adsorptive Removal of Methylene Blue Dye Using Biowaste Materials: Barley Bran and Enset Midrib Leaf

Table 5

Comparative presentation of costs of adsorbents.

Adsorbents	Cost USD/kg	Reference
Activated carbon from nutshells	2.15	[45]
Virgin carbon	0.86-2.95	[46]
Reactivated carbon	0.43-0.70	[47]
Alumina	0.03	[48]
Sludge-based adsorbents	0.1-0.2	[41]
Clay minerals	0.04-0.12	[49]
Zeolite	0.14-0.8	[48, 50]
Diatomite	0.011-1.10	[48]
BB	<0.012 (processing cost only)	Current study
EVML	<0.02 (processing cost only)	Current study