Table 2.

Langmuir and Freundlich parameters for adsorption of As(V) onto CES.

	Parameter	298 K	303 K	313 K
Langmuir isotherm	qm (mg g−1)	91.05	96.99	100.95
	b (L mg−1)	0.064	0.068	0.089
	R2	0.995	0.993	0.991
Freundlich isotherm	KF (mg g−1) (L mg−1)1/n	21.04	22.40	25.55
	1/n	0.26	0.26	0.25
	R2	0.9912	0.935	0.929