Table 5

Source of P^z	Sample no	Elovich		First-order		Second-order		Two-constant rate		Parabolic diffusion		Modified first-order
Source of P^z	Sample no	R²	SE	R²	SE	R²	SE	R²	SE	R²	SE	R²	SE
MKP	4	0.729	0.49	0.984	0.074	0.909	0.125	0.969	0.131	0.919	0.267	0.987	0.066
	5	0.789	0.4	0.886	0.222	0.75	0.299	0.96	0.147	0.923	0.242	0.958	0.135
	7	0.76	0.547	0.974	0.092	0.901	0.1	0.928	0.176	0.941	0.27	0.989	0.059
	10	0.782	0.195	0.963	0.112	0.871	0.335	0.756	0.196	0.952	0.091	0.998	0.028
PSC	14	0.681	0.526	0.989	0.059	0.933	0.107	0.9	0.09	0.883	0.319	0.967	0.104
	16	0.715	0.661	0.992	0.048	0.937	0.063	0.825	0.242	0.911	0.369	0.978	0.078
	17	0.574	0.543	0.967	0.087	0.956	0.062	0.604	0.326	0.816	0.356	0.857	0.181
	20	0.793	0.928	0.939	0.155	0.817	0.097	0.512	0.302	0.95	0.457	0.994	0.05
BF	22	0.8	0.47	0.921	0.198	0.775	0.277	0.93	0.166	0.951	0.232	0.991	0.068
	24	0.827	0.407	0.927	0.173	0.815	0.209	0.945	0.165	0.974	0.158	0.996	0.041
	26	0.94	0.135	0.806	0.268	0.701	0.413	0.937	0.161	0.984	0.07	0.951	0.134
	29	0.589	0.756	0.985	0.101	0.901	0.248	0.918	0.136	0.81	0.514	0.948	0.192

Table 5: Summary of R² values and standard error of estimates (SE) of six kinetic models for desorption of P by the DTPA-TEA-CaCl₂ solution (pH 7.3) from representative cultivated tailing samples ^zMKP=monopotasium phosphate (KH₂PO₄); PSC=peat-shrimp wastes compost; BF=bone flour