Removal of Lead from Water Using Calcium Alginate Beads Doped with Hydrazine Sulphate-Activated Red Mud as Adsorbent

Table 3

Adsorption parameters.

S. number	Adsorption isotherms	—	Slope	Intercept	R^2
(1)	Freundlich isotherm	—	0.0894	2.0781	0.9662
(2)	Langmuir isotherm	RL = 0.0133	0.0057	0.0077	0.9996
(3)	Temkin isotherm	B = 12.701	12.701	119.97	0.9603
(4)	Dubinin–Radushkevich isotherm	E = 0.408	−3E−06	5.1485	0.9841