TABLE 3.

Isotherm parameters of PMBN3 adsorption towards Sr(II).

Isotherm models	Parameters	—
Langmuir isotherm	K L (L⋅mg−1)	0.41
	q m (mg⋅g-1)	26.63
	R 2	0.89
Freundlich isotherm	N	8.31
	K F (mg1-n⋅Ln/g)	15.96
	R 2	0.98
D-R isotherm	β (mol2⋅J−2)	5.31 × 10–9
	E (kJ⋅mol−1)	9.703
	R 2	0.96
Temkin isotherm	K t (L/mg)	5.34
	Β	2.76
	R 2	0.97