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

Table 4

Isotherm constants of O.M adsorption onto RBC and RGC samples at 35°C (particle size: 63 𝜇m; 𝐶₀ = 491 ppm; S/L = 20 g/L; 𝑇: 35°C).

Adsorbents	Langmuir equation			Freundlich equation
	𝑞𝑚 (mg/g)	𝐾𝐿 (L/mg) 10^3	𝑅^2	ln𝐾𝐹	1/𝑛	𝑅^2
RBC	17.26	3.0	0.994	−31.12	13.06	0.882
RGC	15.05	3.5	0.984	−42.32	14.32	0.963