Table 2.

The contents of the analyzed elements in soil (total and extractability contents), given in mg kg ⁻¹ , n = 4

Element	Extraction in H 2 O	Extraction in 0.1 mol L −1 HCl	Extraction in DTPA–CaCl 2 –TEA	Total contents
				Copper mine environ (site 1)	Former iron mine environ (site 2)	Reference area (site 3)	Urban area (site 4)
Ag	<0.01	0.02 ± 0.01	<0.01	0.47	0.76	0.46	1.09
Al	23.9 ± 16.5	62.9 ± 46.2	0.78 ± 0.88	58992	61061	59467	59643
As	<0.25	<0.25	<0.25	26.9	23.4	18.9	48.7
Ba	0.18 ± 0.05	10.9 ± 5.81	0.71 ± 0.40	311	403	343	437
Ca	104 ± 47.7	3421 ± 430	1222 ± 197	22677	20447	21954	35394
Cd	0.01 ± 0.001	0.05 ± 0.03	0.05 ± 0.03	1.06	0.96	0.86	0.59
Cr	0.04 ± 0.02	0.06 ± 0.03	0.01 ± 0.003	63.6	41.9	55.8	54.2
Cu	0.30 ± 0.06	1.57 ± 1.97	8.60 ± 6.65	100	63.7	34.3	79.0
Fe	27.9 ± 18.1	4.43 ± 4.84	28.0 ± 33.4	43025	32629	32646	31242
K	56.2 ± 15.6	155 ± 47.2	81.6 ± 26.6	23716	19805	16173	20290
Li	0.01 ± 0.004	0.04 ± 0.006	0.006 ± 0.005	7.79	5.70	7.74	9.81
Mg	21.7 ± 6.15	305 ± 79.6	103 ± 28.7	10676	6583	8956	8629
Mn	0.47 ± 0.31	44.4 ± 28.5	10.6 ± 2.82	521	577	575	567
Mo	0.04 ± 0.04	0.04 ± 0.02	0.03 ± 0.03	4.0	3.2	2.8	2.5
Na	6.91 ± 4.67	9.73 ± 5.94	6.06 ± 5.35	8582	9248	8506	7956
Ni	0.18 ± 0.05	0.84 ± 0.54	0.55 ± 0.22	19.6	39.0	23.9	34.0
P	16.6 ± 3.75	177 ± 24.8	5.19 ± 1.41	1385	931	995	2184
Pb	0.25 ± 0.07	0.38 ± 0.26	1.71 ± 1.15	24.4	44.8	36.8	83.9
V	0.08 ± 0.03	0.10 ± 0.08	0.06 ± 0.04	93.8	72.2	82.7	67.9
Zn	0.28 ± 0.11	6.02 ± 5.34	5.02 ± 5.10	78.8	72.9	73.2	181

Bold values indicated the maximum extracted content of current element under specific extraction reagents.