Table 2.

Calculated isotherm parameters via linear regression.

T (K)	Langmuir					Freundlich
	$\frac{{\mathit{C}}_{\mathit{e}}}{{\mathit{q}}_{\mathit{e}}}=\frac{1}{{\mathit{q}}_{\mathit{m}\mathit{a}\mathit{x}}}{\mathit{C}}_{\mathit{e}}+\frac{1}{{\mathit{K}}_{\mathit{L}}{\mathit{q}}_{\mathit{m}\mathit{a}\mathit{x}}}$					$\mathbf{log}{\mathit{q}}_{\mathit{e}}=\mathbf{log}{\mathit{K}}_{\mathit{F}}+\frac{1}{\mathit{n}}\mathbf{log}{\mathit{C}}_{\mathit{e}}$
	qmax	KL	RL	R2	Δq	KF	1/n	R2	Δq
293	7.37	1.32	0.05–0.43	0.99	0.31	3.72	0.27	0.99	0.04
298	5.33	1.85	0.03–0.34	0.99	0.24	3.12	0.22	0.98	0.06
303	5.40	1.56	0.04–0.38	0.99	0.18	2.92	0.25	0.95	0.1

Note: C_e equilibrium phosphate concentration; K_L Langmuir thermodynamic constant (L/mg); R_L Langmuir separation factor; q_e adsorption capacity in equilibrium; q_max calculated maximum adsorption capacity at each temperature; K_F Freundlich thermodynamic constant ((mg/g)·(L/mg)^1/n); 1/n Freundlich’s intensity factor.