. Author manuscript; available in PMC: 2015 Jan 15.

Published in final edited form as: J Hazard Mater. 2013 Nov 13;264:10.1016/j.jhazmat.2013.11.007. doi: 10.1016/j.jhazmat.2013.11.007

Table 2.

Intra-particle diffusion rate constants for adsorption of Cd²⁺, Zn²⁺ and 2,4,5-trichlorophenol by composite materials intra-particle diffusion rate constants for Cd²⁺ and Zn²⁺ adsorption.

Intra-particle diffusion rate constants for Cd²⁺ and Zn²⁺ adsorption
Cellulose	Chitosan	B15C5	Metal ion adsorbed	k_ip1 (μmol g⁻¹ min^−1/2)	k_ip2 (μmol g⁻¹ min^−1/2)
	50	50	Cd²⁺	22 ± 1	3.4 ± 0.2
	100		Cd²⁺	10.3 ± 0.6	2.7 ± 0.9
	50	50	Zn²⁺	7.3 ± 0.4	2.6 ± 0.3
50		50	Zn²⁺	8 ± 1	0.7 ± 0.2

Intra-particle diffusion rate constants for 2,4,5-trichlorophenol adsorption
Cellulose	Chitosan	B15C5	k_ip1 (μmol g⁻¹ min^−1/2)	k_ip2 (μmol g⁻¹ min^−1/2)
	100		2.5 ± 0.1	0.77 ± 0.06
100			0.68 ± 0.02	0.135 ± 0.005
40		60	0.52 ± 0.05	0.049 ± 0.001
30	20	50	1.25 ± 0.04	0.32 ± 0.03
20	50	30	1.50 ± 0.03	0.54 ± 0.02