Characteristics of Heavy Metal Ion Adsorption by Silty Mudstones in Coal Mine Goafs

Table 3

Adsorption capacity of equivalent mass units.

Test group	Pb	Cd1	Cd2	Cr	Mn1	Mn2
(mg/L)	0.057	0.522	2.205	0.367	0.835	6.803
(mg/L)	20.41	7.749	18.59	15.21	7.99	20.11
(cm^2)	28.67	17.08	18.06	20.03	27.09	18.46
(mg/dm^2)	14.2	8.46	18.14	14.82	5.28	14.42
(mg/g)
Langmuir model	0.207	0.513	1.055	1.098	0.291	0.943
Freundlich model	0.953	0.638	0.993	1.081	0.3075	0.968
D–R model	0.859	0.625	1.000	1.094	0.308	0.948
Mean	0.906	0.592	1.016	1.091	0.3022	0.953