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

Table 5

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

	Langmuir				Freundlich
	𝑎	𝑏	𝑅^2	Δ𝐺ads/kJmol^−1	𝑅𝐿	𝐾𝐹	1/𝑛	𝑅^2
La
Ce
Pr			0.0553			5690	0.999	0.418
Nd			0.0727			10100	1.27	0.375
Sm			0.00190			838	0.724	0.157
Eu			0.2107			41600	1.65	0.521
Gd			0.157			44300	1.69	0.526
Tb			0.0974			7980	1.08	0.599
Dy			0.108			13900	1.32	0.506
Ho			0.101			11100	1.26	0.529
Er			0.110			8290	1.14	0.625
Tm			0.0915			8830	1.15	0.588
Yb
Lu

stands for no data.