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

Table 1

Physicochemical properties of the five experimental soils collected from different agroecological zones of West Bengal, India (data represent mean of tree replications ± SD).

Property	Soil
	S1	S2	S3	S4	S5
pH (1 : 2.5) H2O	7.89±1.78	8.09±3.27	8.62±3.39	6.02±1.14	5.61±2.03
O.C (g kg^−1)	7.03±1.05	6.02±2.19	5.21±1.79	8.21±1.28	8.65±3.17
CEC [cmol (p^+) kg^−1]	22.13±3.79	25.39±5.01	29.87±2.19	8.35±2.02	6.14±2.15
Clay (%)	39±7.78	41±8.69	48±4.37	20±3.92	18±1.78
Sand (%)	14±3.67	15±2.49	18±1.75	28±3.15	31±3.13
Silt (%)	47±6.67	44±4.78	34±5.17	52±7.53	51±6.35
Texture	Silty clay loam	Silty clay	Clay	Silty loam	Silty loam
Taxonomic classification	Vertic; Ustochrept	Typic; Haplumbrept	Typic; Paleustalf	Typic; Haplumbrept	Typic; Haplaquest
CaCO3 (%)	5.51±1.49	5.62±1.09	6.35±1.97	0.59±0.07	0.41±0.12
DTPA extractable Cd (mg kg^−1)	0.004±0.001	0.006±0.001	0.008±0.001	0.002±0.001	0.001±0.001