Table 3.

Parameters of isotherms for methylene blue dye treatment using modified rice straw at different temperatures (293–333 K) and pH 6.

Model	Parameters	293 K	303 K	313 K	323 K	333 K
Langmuir	Kl × 10–4	7.663	4.404	1.490	1.147	2.491
	qm × 104	9.64	8.58	6.36	4.14	3.01
	R2	0.999	0.994	0.997	0.986	0.997
Freundlich	KF × 10–2	4.952	1.795	1.888	5.911	14.881
	n	10.1	4.05	3.39	4.69	8.41
	R2	0.683	0.731	0.898	0.965	0.980
Temkin	KT × 10–8	4.851	1.784	0.012	0.0062	0.173
	b × 10–7	3.045	0.251	2.546	4.475	9.228
	R2	0.702	0.754	0.935	0.932	0.968