Comparative Biosorption Studies of Hexavalent Chromium Ion onto Raw and Modified Palm Branches

Table 3

Kinetic parameters for Cr (VI) adsorption on the biosorbents.

Adsorbents	𝑞𝑒,exp (mg/g)	Pseudo-first order			Pseudo-second order			Intraparticle; diffusion
		𝑘1	𝑞𝑒,cal (mg/g)	𝑅^2	𝑘2	𝑞𝑒,cal (mg/g)	𝑅^2	𝐾𝑝	𝐶
PB	80.5	0.013	38	0.9251	6.4×10^−3	82	0.997	7.2	19
COPB	96.2	0.017	79	0.7294	1.7×10^−4	98	0.999	6.0	20
SOPB	89.5	0.014	76	0.9225	7.1×10^−4	90	0.998	7.6	24