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

Table 4

Energy of activation for the adsorption of AY and MB on (1) γ-alumina and (2) DNPH-γ-alumina.

Dye	Adsorbent	(KJmol^−1)
		20 mg/L	30 mg/L	40 mg/L
AY	1	+36.3	+37.5	+47.2
	2	+20	+49.5	+125.8
MB	1	+5.5	+20	+21.7
	2	+12.8	+42.7	+43.3