Biosorption of Lanthanides from Aqueous Solutions Using Pretreated Buccinum tenuissimum Shell Biomass

Table 3

Coefficient of Langmuir and Freundlich isotherms for lanthanides using original Buccinum tenuissimum shell biomass.

	Langmuir isotherm				Freundlich isotherm
	𝑎	𝑏	𝑅2	Δ𝐺ads/KJmol^-1	𝑅𝐿	𝐾𝐹	1/𝑛	𝑅2
La	400	0.490	0.638	−15.3	0.0200	115	0.654	0.844
Ce	370	1.17	0.886	−17.5	0.0084	163	0.583	0.864
Pr	400	0.714	0.750	−16.3	0.0138	145	0.658	0.853
Nd	400	0.610	0.681	−15.9	0.0161	133	0.662	0.846
Sm	417	0.6.32	0.740	−16.0	0.0156	145	0.709	0.863
Eu	417	0.571	0.794	−15.7	0.0172	136	0.723	0.883
Gd	435	0.418	0.788	−15.0	0.0234	114	0.765	0.904
Tb	476	0.328	0.800	−14.4	0.0296	105	0.778	0.912
Dy	476	0.239	0.849	−13.8	0.0367	81.8	0.804	0.932
Ho	476	0.183	0.870	−12.9	0.0519	65.2	0.799	0.924
Er	476	0.148	0.878	−12.4	0.0633	55.6	0.787	0.920
Tm	476	0.135	0.842	−12.2	0.0687	52.6	0.785	0.910
Yb	476	0.136	0.818	−12.2	0.0683	53.3	0.762	0.887
Lu	500	0.119	0.786	−11.8	0.0775	51.3	0.759	0.877