Equilibrium, Kinetics, and Thermodynamics of Remazol Brilliant Blue R Dye Adsorption onto Activated Carbon Prepared from Pinang Frond

Table 3

Intraparticle diffusion model constants for the adsorption of RBBR on PF-AC.

𝐶0 (mg/L)	Intraparticle diffusion model
	𝑘𝑝1 (mg/g h^1/2)	𝑘𝑝2 (mg/g h^1/2)	𝑘𝑝3 (mg/g h^1/2)	𝐶1	𝐶2	𝐶3	(𝑅1)^2	(𝑅2)^2	(𝑅3)^2
50	55.6	7.14	—	0	29.62	43.8	1	0.690	—
100	55.0	23.29	0.21	0	27.89	74.18	1	0.780	0.995
200	86.0	36.24	4.37	0	42.34	105.05	1	0.798	0.994
300	81.0	52.12	9.24	0	24.44	116.28	1	0.929	0.999
400	92.8	63.59	9.67	0	33.81	147.08	1	0.896	0.999
500	107.0	61.80	11.23	0	36.44	150.08	1	0.958	0.995