Study of the Equilibrium, Kinetics, and Thermodynamics of Boron Removal from Waters with Commercial Magnesium Oxide

Table 4

Kinetic parameters for the adsorption of boron with MgO at 25°C, 40°C, and 50°C.

Temperature	Pseudo-first-order model			Pseudo-second-order model
		k	R^2		k	Vo	R^2
	(mg·g^−1)	(min^−1)		(mg·g^−1)	(g·mg min^−1)	(g·mg min^−1)
25°C	5.158	0.056	0.96	7.81	0.033	2.012	0.99
40°C	—	—	0.83	8.12	0.067	4.409	0.99
50°C	—	—	0.46	8.17	0.141	9.381	0.99

Concentration of boron = 350 mg·L⁻¹, pH = 10, concentration of MgO = 40 g·L⁻¹, and stirring speed = 150 rpm.