Table 10.

Statistical error functions of estimated equilibrium isotherm nonlinear models for the biosorption process conducted on SPA 5% biosorbent.

Equilibrium Isotherm Model	Statistical Error Function
	RMSE	MPSD	HYBRID	Χ 2	R 2
Freundlich	0.5895	2.2028	0.9141	0.027	0.9973
Temkin	0.9787	9.3994	11.0666	0.3417	0.9784
Hill	0.2396	2.2021	0.7805	0.0157	0.9987
Redlich–Peterson	0.3907	3.4869	1.9578	0.0392	0.9965
Sips	0.2396	2.2021	0.7805	0.0157	0.9987
Toth	1.5706	20.8824	48.2691	0.8271	0.9444