Indian Jujuba Seed Powder as an Eco-Friendly and a Low-Cost Biosorbent for Removal of Acid Blue 25 from Aqueous Solution

Table 2

Pseudo-first-order and pseudo-second-order rate constants at 35°C and different initial AB25 concentrations. Conditions: size of IJSP = <53 μm; pH of AB25 soln = 5.44; dose of IJSP = 100 mg; and speed of agitation = 180 rpm.

(mg L^−1)	(mg g^−1)	Pseudo-first-order model			Pseudo-second-order model
		(min^−1)	(mg g^−1)		(min^−1)	(mg g^−1)
25	4.8477	0.0237	5.4967	0.9517	0.3919	4.8498	1.0000
50	9.5645	0.0122	10.7997	0.9726	0.1574	9.5698	1.0000
75	14.2129	0.0182	15.4760	0.9890	0.0461	14.2309	0.9999
100	17.9102	0.0092	21.0927	0.9924	0.0146	17.9673	0.9993