Table 4.

Heavy metal content in soil samples (Mean ± SD, mg·kg⁻¹).

Number	Pb	Cd	Cr	As	Hg	Cu
1	57.5 ± 2.9	0.21 ± 0.01	48.6 ± 2.4	60.9 ± 3.0	0.12 ± 0.01	48.2 ± 2.4
2	68.9 ± 3.1	0.22 ± 0.01	4.8 ± 0.2	96.8 ± 4.4	0.39 ± 0.02	65.3 ± 2.9
3	28.8 ± 1.3	0.23 ± 0.01	4.8 ± 0.2	10.0 ± 0.5	0.15 ± 0.01	43.2 ± 1.9
4	28.3 ± 1.3	0.29 ± 0.01	78.5 ± 3.5	47.2 ± 2.1	0.26 ± 0.01	47.9 ± 2.1
5	138.5 ± 6.0	0.24 ± 0.01	19.0 ± 0.8	5.5 ± 0.2	0.18 ± 0.01	25.4 ± 1.1
6	126.5 ± 5.3	0.29 ± 0.01	51.1 ± 2.1	29.9 ± 1.3	0.37 ± 0.02	43.1 ± 1.8
7	55.8 ± 3.4	0.18 ± 0.01	126.5 ± 7.6	77.2 ± 4.6	0.08 ± 0.01	18.3 ± 1.1
8	36.2 ± 2.1	0.21 ± 0.01	176.8 ± 10.4	50.4 ± 3.0	0.76 ± 0.05	24.6 ± 1.5
9	27.7 ± 1.2	0.12 ± 0.01	135.3 ± 5.7	4.1 ± 0.2	0.13 ± 0.01	15.2 ± 0.6
10	38.0 ± 1.1	0.22 ± 0.01	85.3 ± 2.6	20.5 ± 0.6	0.12 ± 0.00	37.9 ± 1.1
11	66.6 ± 1.4	0.75 ± 0.02	123.3 ± 2.6	57.5 ± 1.2	0.52 ± 0.01	30.3 ± 0.6
12	63.5 ± 2.2	0.71 ± 0.03	80.0 ± 2.8	73.7 ± 2.6	0.90 ± 0.03	44.4 ± 1.6
13	27.9 ± 1.3	0.13 ± 0.01	109.5 ± 5.0	43.4 ± 2.0	0.64 ± 0.03	27.3 ± 1.3
14	40.4 ± 1.9	0.40 ± 0.02	82.0 ± 3.9	59.6 ± 2.8	0.23 ± 0.01	13.4 ± 0.6
15	40.4 ± 2.0	0.43 ± 0.02	121.6 ± 6.1	65.6 ± 3.3	0.12 ± 0.01	46.56 ± 2.3
16	90.6 ± 5.4	0.55 ± 0.03	113.9 ± 6.8	94.1 ± 5.6	0.10 ± 0.01	44.7 ± 2.7
17	91.4 ± 4.8	0.22 ± 0.01	106.1 ± 5.6	126.3 ± 6.7	0.15 ± 0.01	22.8 ± 1.2
18	91.5 ± 4.9	0.77 ± 0.04	178.9 ± 9.5	119.2 ± 6.3	0.13 ± 0.01	25.7 ± 1.4
19	34.2 ± 1.5	0.28 ± 0.01	72.0 ± 3.2	22.5 ± 1.0	0.05 ± 0.00	31.3 ± 1.4
20	51.9 ± 3.5	0.25 ± 0.02	89.6 ± 6.1	108.0 ± 7.3	0.18 ± 0.01	20.6 ± 1.4
21	29.9 ± 2.1	0.06 ± 0.00	70.9 ± 5.0	40.1 ± 2.9	0.09 ± 0.01	62.7 ± 4.5
22	21.7 ± 0.4	0.62 ± 0.01	83.4 ± 1.5	208.5 ± 3.8	0.62 ± 0.01	36.2 ± 0.7
23	54.6 ± 1.2	0.29 ± 0.01	101.6 ± 2.1	75.4 ± 1.6	0.57 ± 0.01	42.8 ± 0.9
24	151.1 ± 8.2	0.26 ± 0.01	117.3 ± 6.3	27.0 ± 1.5	0.09 ± 0.01	49.6 ± 2.7
25	41.2 ± 0.9	0.29 ± 0.01	45.9 ± 1.0	56.1 ± 1.2	0.48 ± 0.01	13.2 ± 0.3
26	101.1 ± 5.7	0.29 ± 0.02	109.7 ± 6.1	25.5 ± 1.4	0.07 ± 0.01	29.1 ± 1.6
27	55.8 ± 1.4	0.49 ± 0.01	128.8 ± 3.2	21.4 ± 0.5	0.06 ± 0.00	37.8 ± 0.9
28	62.7 ± 1.4	0.48 ± 0.01	150.7 ± 3.5	85.5 ± 2.0	0.61 ± 0.014	42.6 ± 1.0
29	97.9 ± 3.2	0.290 ± 0.01	160.3 ± 5.3	13.4 ± 0.4	0.94 ± 0.03	48.8 ± 1.6
30	116.2 ± 5.0	0.47 ± 0.02	85.6 ± 3.7	84.9 ± 3.7	0.10 ± 0.00	55.6 ± 2.4
31	70.7 ± 0.9	0.23 ± 0.00	158.7 ± 2.1	74.0 ± 1.0	0.22 ± 0.00	37.7 ± 0.5
32	49.5 ± 2.6	0.62 ± 0.03	176.2 ± 9.3	86.0 ± 4.6	0.17 ± 0.01	41.8 ± 2.2
33	50.7 ± 2.2	0.91 ± 0.04	182.6 ± 7.9	80.4 ± 3.5	0.12 ± 0.01	40.0 ± 1.7
34	42.9 ± 1.0	0.28 ± 0.01	98.1 ± 2.3	20.7 ± 0.5	0.045 ± 0.001	25.2 ± 0.6
35	47.1 ± 1.6	0.23 ± 0.01	78.8 ± 2.6	26.7 ± 0.9	0.071 ± 0.002	17.7 ± 0.6
36	37.5 ± 1.6	0.21 ± 0.01	124.9 ± 5.4	5.3 ± 0.2	0.104 ± 0.004	10.1 ± 0.4
37	45.1 ± 1.4	0.37 ± 0.01	107.5 ± 3.4	8.4 ± 0.3	0.083 ± 0.003	31.5 ± 1.0