Application of Glycyrrhiza glabra Root as a Novel Adsorbent in the Removal of Toluene Vapors: Equilibrium, Kinetic, and Thermodynamic Study

Table 1

Characteristics of the GGR (on the dry basis).

Parameters
Chemical composition (%)
CaO	4.83
SiO2	1.76
Al2O3	0.552
Fe2O3	0.317
SO3	0.243
MgO	0.186
Na2O	0.072
K2O	0.068
P2O5	0.062
SrO	0.046
Cl	0.030
ZnO	0.019
TiO2	0.017
CuO	0.011
C	44.6
H	5.33
N	1.47
Physical characteristics
pH	7.4
BET surface area (m^2/g)	1.532
Particle diameter (cm)	0.5–1
Water holding capacity (g water/g dry GGR)	2.9
Bulk density (kg/m^3)	37.62