Evolution Mechanism of Mesocrack and Macrocrack Propagation in Carbonaceous Mudstone under the Action of Dry-Wet Cycles

Table 2

Concentration of metal cations in aqueous solution under dry-wet cycles.

Concentration of metal cations (mg·L^-1)	Number of dry-wet cycles
	0	5	10	15
Ca^2+	5.20	188.65	367.62	528.58
K^+	1.80	6.88	13.71	19.65
Na^+	1.40	9.10	11.77	14.60
Al^3+	0.30	0.88	1.06	1.22
Fe^2+	5.50	6.34	9.87	11.38