Preparation of a Modified Nanoalumina Sorbent for the Removal of Alizarin Yellow R and Methylene Blue Dyes from Aqueous Solutions

Table 1

Surface characteristics of γ-alumina and DNPH-γ-alumina.

Surface properties	γ-Alumina	DNPH-γ-alumina
BET surface area	169.643 m^2/g	117.217 m^2/g
BJH adsorption surface area	200.681 m^2/g	162.102 m^2/g
Pore volume	0.288 cc/g	0.226 cc/g
Pore diameter	1.192 nm	1.217 nm
BJH desorption surface area	176.592 m^2/g	152.771 m^2/g
Pore volume	0.281 cc/g	0.223 cc/g
Pore diameter	1.415 nm	1.397 nm
	8.5	6