Journal of Chemistry

Research Article

Chemical Modifications of Cassava Peel as Adsorbent Material for Metals Ions from Wastewater

Table 8

Parameters related to the linear models for Langmuir and Freundlich adsorption of Cd(II), Pb(II), and Cr(III) by M. H₂O₂, M. H₂SO₄, and M. NaOH materials.


Parameters	M. H₂O₂	M. H₂SO₄	M. NaOH	M. H₂O₂	M. H₂SO₄	M. NaOH	M. H₂O₂	M. H₂SO₄	M. NaOH
Parameters	Cd(II)			Pb(II)			Cr(III)

Langmuir	13.421	7.058	19.539	21.678	24.004	42.463	43.975	10.074	54.645
	0.026	0.017	0.006	0.022	0.019	0.002	0.013	0.049	0.010
	0.163	0.224	0.467	0.188	0.207	0.667	0.273	0.093	0.329
	0.993	0.980	0.996	0.994	0.938	0.996	0.990	0.964	0.870

Freundlich	1.967	1.565	3.634	2.510	1.692	3.393	2.025	1.420	5.448
	2.287	1.020	1.678	1.764	1.488	0.762	2.700	3.031	3.580
	0.934	0.977	0.902	0.980	0.977	0.931	0.855	0.862	0.834

(mg g⁻¹): maximum adsorption capacity; or (L mg⁻¹): constant related to the strength of adsorbent/adsorbate interaction; : Langmuir constant; : coefficient of determination; (mg g⁻¹): related to the adsorption capacity; : related to the solid heterogeneity.