A Study on Astrazon Black AFDL Dye Adsorption onto Vietnamese Diatomite

Table 2

The isotherm parameters of Langmuir and Freundlich models at various concentrations from 400 to 1400 mg L⁻¹.

(mg L^−1)	Langmuir model					Freundlich model
				RL	p					p
400	357.1	0.0244	0.955	0.0930	0.000	0.429	34.2607	447.3	0.975	0.000
500	416.7	0.0123	0.947	0.1402	0.001	0.480	24.2060	476.5	0.987	0.000
600	526.3	0.0098	0.957	0.1450	0.000	0.478	27.1669	578.8	0.978	0.000
800	625.0	0.0046	0.968	0.2132	0.000	0.499	20.5672	579.0	0.991	0.000
900	666.7	0.0033	0.975	0.2507	0.000	0.494	19.4608	560.1	0.977	0.000
1200	625.0	0.0020	0.986	0.3431	0.000	0.541	22.7250	539.3	0.961	0.001
1400	625.0	0.0021	0.946	0.2528	0.001	0.379	30.7288	477.5	0.931	0.002