Retention of Organic Matter Contained in Industrial Phosphoric Acid Solution by Raw Tunisian Clays: Kinetic Equilibrium Study

Table 2

Chemical characteristics of raw clays (in mass %).

Oxides %	SiO2	Al2O3	Fe2O3	K2O	MgO	Na2O	MnO	ZnO	CaCO3	LOI
RGC	43.38	16.82	8.67	0.86	3.46	0.53	0.05	0.12	7.10	8.56
RBC	50.91	16.59	10.56	0.96	1.2	1.85	0.04	0.19	3.02	11.2

LOI: loss ignitions; RBC: raw bentonite clay; RGC: raw gray clay.