Biosorption of Fe(II) and Mn(II) Ions from Aqueous Solution by Rice Husk Ash

Table 2

Kinetic parameters obtained from pseudo-first-order and pseudo-second-order for the Fe(II) and Mn(II) adsorption onto RHA.

	𝑞𝑒,exp (mg/g)	Pseudo-first-order			Pseudo-second-order
		𝐾1 (min^−1)	𝑞𝑒,calc (mg/g)	𝑅^2	𝐾2 (g/mg·min)	𝑞𝑒,calc (mg/g)	𝑅^2
Fe(II)	1.943	0.0714	2.2182	0.981	0.0361	2.2573	0.995
Mn(II)	1.936	0.0691	2.4717	0.974	0.0344	2.262	0.997