Table 5.

Isotherm parameters for the adsorption of As(V) onto BFA-Fe at different temperatures

Isotherms	Constants	Temperatures (Kelvin, K)
		283	293	303	313	323
Langmuir	KL, dm3 µg−1	0.005	0.007	0.011	0.014	0.011
	qm, µg g−1	555.555	133.333	357.143	81.957	115.279
	R2 (Linear)	0.701	0.904	0.845	0.978	0.872
	R2 (Non-Linear)	0.837	0.951	0.921	0.989	0.934
	HYBRID	-53.388	58.381	-2.371	4.148	5.250
	MPSD	47.282	50.771	19.200	15.785	28.029
Freundlich	KF, dm3 µg−1	2.121	3.255	4.495	2.527	2.940
	n	1.059	1.405	1.172	1.504	1.542
	1/n	0.935	0.712	0.853	0.524	0.548
	R2 (Linear)	0.987	0.981	0.955	0.987	0.995
	R2 (Non-Linear)	0.993	0.980	0.978	0.994	0.993
	HYBRID	-0.884	-0.928	-3.721	-0.905	3.138
	MPSD	12.378	13.595	27.511	11.772	23.757
Temkin	B	45.278	22.252	48.904	13.810	15.800
	KT, dm3 µg−1	0.154	0.271	0.314	0.305	0.280
	R2 (Linear)	0.908	0.889	0.945	0.919	0.833
	R2 (Non-Linear)	0.953	0.943	0.973	0.959	0.913
	HYBRID	25.703	15.775	53.709	-385.128	25.534
	MPSD	80.909	85.552	170.095	485.235	83.789
Redilich-Peterson	aR, dm3 µg−1	20.359	0.851	3.020	11.830	251.548
	KR, dm3 µg−1	45.233	5.375	15.745	31.712	759.723
	Β	0.057	0.911	0.138	0.385	0.352
	R2 (Linear)	0.251	0.757	0.254	0.958	0.998
	R2 (Non-Linear)	0.990	0.984	0.994	0.990	0.999
	HYBRID	-0.737	-0.402	-8.184	-0.755	4.014
	MPSD	13.780	20.392	32.584	12.771	20.559