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. 2020 Sep 1;5(36):22827–22839. doi: 10.1021/acsomega.0c02016

Table 7. Isothermal Model Parameters of Cr(VI) Adsorption at Different Temperatures.

		Langmuir model		Freundlich model
t (°C)		k_L (L/mg)	Q_max (mg/g)	R²	k_F	n	R²
MWCNTs-3	25	0.005090	98.8376 ± 0.75%	0.9818	0.8861	1.2678	0.9983
	40	0.009337	80.5809 ± 0.75%	0.9951	1.5983	1.4314	0.9992
	55	0.007676	104.5007 ± 0.75%	0.9971	1.6444	1.3740	0.9994
MWCNTs-OH-3	25	0.009491	73.5304 ± 0.75%	0.9883	1.4511	1.4261	0.9956
	40	0.008665	94.9668 ± 0.75%	0.9911	1.6916	1.3994	0.9985
	55	0.009813	102.0408 ± 0.75%	0.9915	2.0676	1.4205	0.9988
MWCNTs-COOH-3	25	0.01012	91.9118 ± 0.75%	0.9783	2.2371	1.5154	0.9974
	40	0.01494	86.9565 ± 0.75%	0.9900	3.5339	1.6949	0.9986
	55	0.01391	107.5269 ± 0.75%	0.9884	3.7577	1.6139	0.9984