Thermodynamics of Cadmium Sorption on Different Soils of West Bengal, India

Table 3

Modified Langmuir constants of Cd sorption in soils (data represent mean of tree replications ± SD).

Sample ID	Temperature (°C)	Modified Langmuir constants
		Part I curve			Part II curve
		𝑏I (mg kg^−1)	𝑘I (L mg^−1)	𝑅^2	𝑏II (mg kg^−1)	𝑘II (L mg^−1)	𝑅^2
S1	25	14.26±2.73	0.19±0.001	0.998**	81.97±5.19	0.005±0.001	0.999**
	35	17.06±2.97	2.08±0.051	0.992**	88.50±4.07	0.007±0.001	0.994**
	45	20.37±3.01	9.26±1.93	0.991**	97.09±3.79	0.008±0.001	0.999**
S2	25	21.28±3.09	0.20±0.001	0.997**	111.11±7.17	0.006±0.001	0.992**
	35	24.75±2.73	0.76±0.001	0.999**	114.94±7.91	0.008±0.001	0.992**
	45	30.67±4.07	11.24±1.78	0.997**	116.28±11.83	0.011±0.001	0.994**
S3	25	38.02±3.71	0.15±0.001	0.999**	172.41±14.07	0.007±0.001	0.994**
	35	42.37±5.09	0.27±0.001	0.998**	175.44±13.19	0.009±0.001	0.999**
	45	49.26±6.31	0.40±0.001	0.997**	188.68±11.11	0.010±0.001	0.995**
S4	25	12.39±2.07	0.12±0.001	0.998**	67.57±6.37	0.005±0.001	0.990**
	35	12.52±2.56	0.79±0.003	0.998**	79.37±8.19	0.005±0.001	0.995**
	45	15.11±1.73	4.80±1.09	0.999**	90.91±6.67	0.006±0.001	0.996**
S5	25	10.49±1.03	0.08±0.001	0.995**	56.82±7.07	0.004±0.001	0.973**
	35	10.66±1.11	0.16±0.007	0.999**	71.43±3.79	0.004±0.001	0.994**
	45	11.90±1.23	1.26±0.001	0.999**	76.92±4.09	0.005±0.001	0.996**

∗∗Significant at 1% level.