Table 3.

Metal concentrations and summary statistics (mg/kg).

Elements	n a	Range (mg/kg)	Mean ± SD (mg/kg)	Median (mg/kg)	CV	Skewness	Kurtosis	CNEMC Value b (mg/kg)
Major elements
Fe	100	5.47 × 103–2.46 × 104	1.33 × 104 ± 2.87 × 103	1.28 × 105	0.22	0.98	2.29	2.74 × 104
Mg	100	2.30 × 103–7.80 × 103	3.54 × 103 ± 7.67 × 102	3.43 × 103	0.22	2.26	9.44	6.8 × 103
Al	100	3.12 × 103–2.19 × 104	6.08 × 103 ± 2.21 × 103	6.08 × 103	0.36	4.21	26.63	5.95 × 104
Ba	100	68.77–780.97	193.97 ± 126.71	150.97	0.65	2.34	5.95	529.00
Sr	100	25.22–140.86	75.74 ± 21.28	77.69	0.28	0.03	0.22	187.00
Trace elements
Mn	100	249.15–594.94	375.64 ± 64.63	367.49	0.17	1.01	1.75	636.00
Cr	100	30.36–208.69	65.53 ± 23.21	62.52	0.17	1.01	1.75	46.70
Ni	100	14.84–86.37	35.47 ± 9.03	35.47	0.25	2.02	11.00	21.40
Cd	100	1.98–36.73	21.43 ± 12.29	28.83	0.57	–0.92	–1.14	0.10
Co	100	9.56–41.27	29.96 ± 11.67	36.70	0.39	–0.92	–1.11	11.90
Cu	100	17.37–135.59	53.73 ± 21.66	50.36	0.40	1.21	2.29	17.10
Zn	100	34.56–419.86	169.79 ± 70.56	162.22	0.42	0.82	1.20	80.40
Pb	100	23.94–385.35	94.99 ± 67.99	73.31	0.72	2.26	5.86	28.80
As	95	0.56–144.27	47.72 ± 37.09	36.32	0.78	0.69	–0.68	8.00
Hg	73	0.53–1127.24	560.90 ± 294.68	543.43	0.53	0.04	–0.83	0.04
V	100	17.55–79.85	54.41 ± 15.77	60.05	0.29	–0.72	–0.89	68.00

^a The n means effective data number; ^b China National Environmental Monitoring Center (CNEMC) [38].