Study about Doping Ion La³⁺ onto Surface of Pyrolusite Ore for Removing Simultaneously Both Fluoride and Phosphate from Wastewater

Table 1

The kinetic model parameters for the adsorption of phosphate and fluoride on LDPO.

	Conc.; (mg/L)	Pseudo-first order			Pseudo-second order
		(min^−1)	(mg/g)		(g/mg·min)	(mg/g)
Phosphate	30	0.041	6.32	0.854	0.0025	20.83	0.985
	50	0.037	22.38	0.808	0.0026	24.39	0.994
	100	0.016	10.74	0.717	0.0029	26.32	0.991
Fluoride	10	0.041	2.52	0.940	0.006	1.517	0.928
	15	0.048	1.76	0.957	0.005	1.916	0.939
	20	0.051	2.72	0.916	0.002	3.436	0.913