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

Table 6

Coefficient of Langmuir and Freundlich isotherms for lanthanides using Buccinum tenuissimum shell biomass after heat-treatment (950^∘𝐶, 6 hours) and adding water.

	Langmuir				Freundlich
	𝑎	𝑏	𝑅2	Δ𝐺ads/kJmol^-1	𝑅𝐿	𝐾𝐹	1/𝑛	𝑅^2
La	161	0.969	0.999	−17.0	0.0102	59.3	0.264	0.951
Ce	200	0.980	0.999	−17.1	0.0101	70.3	0.283	0.950
Pr	217	0.852	0.998	−16.7	0.0116	69.3	0.327	0.919
Nd	222	0.789	0.997	−16.5	0.0125	68.0	0.340	0.930
Sm	233	0.878	0.996	−16.8	0.0113	72.0	0.364	0.937
Eu	233	0.782	0.996	−16.5	0.0126	68.3	0.380	0.917
Gd	227	0.647	0.997	−16.0	0.0152	61.6	0.384	0.937
Tb	227	0.629	0.996	−16.0	0.0157	61.7	0.390	0.937
Dy	233	0.506	0.996	−15.4	0.0194	57.2	0.409	0.936
Ho	227	0.404	0.996	−14.9	0.0242	50.6	0.425	0.931
Er	222	0.372	0.996	−14.7	0.0262	47.5	0.433	0.928
Tm	233	0.352	0.996	−14.5	0.0276	48.0	0.450	0.922
Yb	244	0.398	0.994	−14.8	0.0245	55.3	0.417	0.934
Lu	217	0.495	0.992	−15.4	0.0198	53.2	0.409	0.885