Evaluation of the Use of Acacia nilotica Leaf as an Ecofriendly Adsorbent for Cr (VI) and Its Suitability in Real Waste Water: Study of Residual Errors

Table 2

Isotherm constants for Cr (VI) adsorption onto 0.4 g of MVM.

Isotherm model	Values
Langmuir
𝑄𝑚 (mgg^−1)	69.4440
𝑏 (Lmg^−1)	0.0296
𝑅^2	0.9984
Freundlich
1/𝑛	0.1079
𝐾𝑓 (mgg^−1)	33.3960
𝑅^2	0.9501
Dubinin-Radushkevich
𝑄𝑚 (mgg^−1)	64.3894
𝐾 (mol^2kJ^−2)	0.0004
𝐸 (kJmol^−1)	0.0353
𝑅^2	0.8395
Temkin
α (Lg^−1)	40.3360
β (mgL^−1)	6.5784
𝑏	379.1499
𝑅^2	0.9460