Study on the Law of Membrane Efficiency of Unsaturated Shale and Its Application

Table 2

Cation exchange capacity of different clay minerals.

Clay minerals	CEC (meq/g)	Reference value (meq/g)
Smectite	1.00	0.80~1.50
Illite	0.25	0.10~0.40
Chlorite	0.15	0.10~0.40