Extraction of Phosphate from Polluted Waters Using Calcium Alginate Beads Doped with Active Carbon Derived from A. aspera Plant as Adsorbent

Table 3

Adsorption and kinetic parameters.

S. number	Adsorption isotherms and kinetic models		Slope	Intercept
(1)	Langmuir isotherm	= 0.033	0.299	−0.204	0.964
(2)	Freundlich isotherm	= 1.669	−0.599	1.916	0.837
(3)	Dubinin-Radushkevich isotherm	= 2.357 kJ/mole		1.578	0.171
(4)	Temkin isotherm	= 1.245 J/mole	−1.254	6.639	0.925
(5)	Pseudo-first-order model		−0.066	0.148	0.964
(6)	Pseudo-second-order model		0.149	0.053	0.999
(7)	Elovich model		0.365	5.488	0.951
(8)	Bangham’s pore diffusion model		0.466	−0.277	0.813