Spatial Variability and Distribution of the Metals in Surface Runoff in a Nonferrous Metal Mine

Table 2

Statistical characteristics of Sb, Ni, Cu, Zn, Cd, and Pb concentrations in surface runoff in antimony mine (mg/L).

Metal	Minimum	Maximum	Standard value	Median	Average	Standard deviation	Coefficient of variation	Geometric mean	Coefficient of skewness	Coefficient of kurtosis	Excessive standard rate	Distribution
Sb	0.1315	2.4853	0.005	1.1324	1.1599	0.5865	0.5056	0.7046	0.1552	2.3609	100%	Normal distribution
Ni	0.0001	0.0143	0.02	0.0078	0.0071	0.0034	0.4789	0.0049	−0.3208	2.3528	0	Negative; skewness; distribution
Cu	0.0403	1.7534	1	0.8193	0.7988	0.3255	0.4075	0.6791	−0.0982	2.8553	28.43%	Normal distribution
Zn	0.9161	2.0209	1	1.002	1.006	0.4619	0.4591	0.6315	0.0037	2.3398	50.51%	Normal distribution
Cd	0.0001	0.1105	0.005	0.0051	0.0047	0.0023	0.4894	0.0043	−0.3576	2.4736	53.43%	Negative; skewness; distribution
Pb	0.0001	0.2220	0.01	0.011	0.0111	0.0051	0.4595	0.0798	−0.0392	2.6395	60.29%	Normal distribution