Fate and Distribution of Heavy Metals in Wastewater Irrigated Calcareous Soils

Table 3

Parameters of Langmuir and Freundlich isotherms for sorption of Zn, Cd, and Ni in WD1 and ZR1 soils.

Metal ion	Soil	Freundlich model			Langmuir model
		𝐾𝐹  mg kg^−1	𝑁	𝑅^2	𝑞max  mg kg^−1	𝐾𝐿	𝑅^2
Zn	WD1	2247.3	0.35	0.94	3028.8	4.61	0.94
	ZR1	3164.6	0.42	0.94	3476.9	5.72	0.95
Cd	WD1	1711.6	0.29	0.93	2370.7	10.00	0.92
	ZR1	2933.6	0.63	0.98	4580.9	1.64	0.99
Ni	WD1	2295.6	0.27	0.96	2462.2	28.40	0.91
	ZR1	2033.4	0.30	0.98	2692.0	5.89	0.93