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. 2021 Sep 10;7(9):e07973. doi: 10.1016/j.heliyon.2021.e07973

Table 3.

Parameters of isotherm models for the phosphate ion adsorption.

Adsorbent	Langmuir				Freundlich
Adsorbent	K_L	q_max (mg/g)	R²	R_L (L/mg)	K_F	1/n_f	R²
CIONP	0.068	3.38	0.956	0.326	0.328	0.879	0.995
C9ST	0.094	2.31	0.955	0.323	0.360	0.822	0.997