Research Article

Valorisation of Pine Cone as an Efficient Biosorbent for the Removal of Pb(II), Cd(II), Cu(II), and Cr(VI)

Table 1

Results obtained from the linearized Langmuir, Freundlich, and Langmuir-Freundlich isotherms.

Langmuir (L)
Freundlich (F)
Langmuir-Freundlich (L-F)
Akaike criterion test
L and L-F
test
F and L-F
Metal (mg g-1) (L mg-1) (mg g-1)AICc

Cu(II)0.860.90
L


L‐F
Cd(II)0.980.94
L‐F


L‐F
Cr(VI)0.800.90
L


L‐F
Pb(II)0.750.90
L‐F


L‐F

AICc: the lowest value corresponds to the best model. test: the null hypothesis is that the simpler model (Langmuir or Freundlich) is correct and alternative model L-F is better than L or F when .