Wien effect of Cd/Zn on soil clay fraction and their interaction

Table 3 The contents of Cd²⁺ and Zn²⁺ in soil colloid particles and corresponding supernatant, the binding energies of Cd²⁺ and Zn²⁺ on different soil colloid particles at various ratio of Cd²⁺ and Zn²⁺, related parameters to calculate the binding energy

Cd²⁺/Zn²⁺	Soil type	EC₀ (mS cm⁻¹)	Metal in colloid particles (mmol kg⁻¹)		EC_iu (mS cm⁻¹)		Metal in supernatant (mmol L⁻¹)		EC_i0 (mS cm⁻¹)		△G_bi (kJ mol⁻¹)
Cd²⁺/Zn²⁺	Soil type	EC₀ (mS cm⁻¹)	Cd²⁺	Zn²⁺	Cd²⁺	Zn²⁺	Cd²⁺	Zn²⁺	Cd²⁺	Zn²⁺	Cd²⁺	Zn²⁺
1:1	Boggy soil	0.0088	75.24	79.17	0.0813	0.0836	0.0126	0.0175	0.0037	0.0051	7.64	6.95
	Paddy soil	0.0129	60.21	61.84	0.0650	0.0653	0.0445	0.0444	0.0065	0.0064	5.70	5.77
	Yellow brown soil	0.0079	62.68	64.03	0.0677	0.0676	0.0124	0.0117	0.0041	0.0038	6.95	7.15
	Yellow drab soil	0.0122	66.45	69.14	0.0718	0.0730	0.0835	0.0861	0.0061	0.0061	6.12	6.15
1:3	Boggy soil	0.0125	42.91	127.56	0.0463	0.1347	0.0013	0.0064	0.0021	0.0104	7.66	6.35
	Paddy soil	0.0128	33.74	92.28	0.0364	0.0974	0.0055	0.0182	0.0030	0.0098	6.17	5.70
	Yellow brown soil	0.0111	37.51	107.95	0.0405	0.1140	0.0076	0.0241	0.0027	0.0084	6.72	6.47
	Yellow drab soil	0.0141	39.37	113.31	0.0425	0.1197	0.0020	0.0086	0.0028	0.0113	6.78	5.84
3:1	Boggy soil	0.0114	127.64	45.69	0.1379	0.0482	0.0074	0.0024	0.0087	0.0027	6.86	7.14
	Paddy soil	0.0147	100.78	32.89	0.1088	0.0347	0.0148	0.0046	0.0113	0.0034	5.62	5.76
	Yellow brown soil	0.0153	112.25	37.92	0.1212	0.0400	0.0091	0.0025	0.0121	0.0032	5.72	6.23
	Yellow drab soil	0.0156	115.42	36.19	0.1247	0.0382	0.0123	0.0033	0.0124	0.0032	5.73	6.12

ISSN: 1467-4866