Table 3 Total content (T) of heavy metals in the soil depth of 0–10 and 20–30 cm in contaminated, alluvial and reference sites with basic statistical characteristics compared to threshold and guideline values (mg/kg).

From: Floodplain soils contamination assessment using the sequential extraction method of heavy metals from past mining activities

Depth (cm)	Site	Locality	Cd	Co	Cr	Cu	Mo	Ni	Pb	Zn
0–10	CS	2CS-PEB	13.18	16.90	32.72	90.18	12.28	27.83	868.39	1841.51
		4CS-CEB	6.96	17.89	33.39	81.80	2.03	22.74	2924.80	979.39
		x̄	10.07	17.40	33.05	85.99	7.15	25.29	1896.59	1410.45
		SD	3.11	0.49	0.33	4.19	5.13	2.55	1028.21	431.06
	AS	1AS-RZ	14.16	15.68	24.35	122.32	3.83	18.02	2602.79	1948.56
		1AS-GL	23.95	7.98	11.98	143.71	3.99	11.98	890.22	2155.69
		3AS-RZ	12.14	11.56	19.58	117.68	3.08	12.95	631.60	1566.59
		5AS-RZ	3.93	16.62	29.40	35.26	1.03	17.86	401.56	454.68
		6AS-RZ	15.85	17.69	25.97	252.70	1.86	15.94	919.51	2032.25
		6AS-GL	11.97	11.97	23.93	227.36	0.00	19.94	1108.90	3103.31
		8AS-RZ	14.65	17.56	24.97	156.93	2.29	17.53	602.72	1920.56
		8AS-GL	3.94	11.81	23.62	35.43	0.00	11.81	153.54	307.09
		9AS-RZ	19.57	13.69	20.10	235.96	3.46	13.53	1245.83	2044.74
		10AS-RZ	11.81	17.35	22.24	210.75	2.90	13.86	783.27	1327.99
		11AS-RZ	16.39	15.40	18.46	266.59	2.35	13.11	1042.77	1810.83
		12AS-RZ	16.06	13.44	19.26	222.32	1.44	12.45	1357.63	1669.09
		13AS-RZ	14.06	18.09	34.05	147.01	2.66	18.46	977.43	1362.35
		13AS-AL-1	11.84	11.84	35.53	126.33	0.00	15.79	1508.09	1267.27
		13AS-AL-2	11.96	15.94	51.81	151.45	0.00	27.90	1466.72	1502.59
		14AS-AL	14.73	12.63	28.79	95.80	1.16	15.69	1512.26	1653.78
		15AS-RZ	11.87	11.87	55.38	106.80	0.00	27.69	439.08	1079.91
		15AS-AL-1	23.71	15.80	43.46	537.34	3.95	23.71	2580.01	2370.60
		15AS-AL-2	19.67	13.95	62.11	170.33	1.57	34.78	1104.50	2106.45
		x̄	14.33	14.26	30.26	176.95	1.87	18.05	1122.55	1667.60
		SD	5.12	2.66	13.32	106.78	1.41	6.14	627.45	628.24
		Min	3.93	7.98	11.98	35.26	0.00	11.81	153.54	307.09
		Max	23.95	18.09	62.11	537.34	3.99	34.78	2602.79	3103.31
	RS	7RS-GL	3.33	15.20	24.92	13.48	1.55	14.70	94.87	170.25
20–30	AS	1AS-RZ	14.20	13.98	21.95	127.28	3.85	14.77	1081.98	1744.37
		3AS-RZ	13.18	13.11	21.80	134.37	3.77	14.67	506.67	1710.54
		5AS-RZ	3.48	13.69	30.03	30.42	0.72	16.44	377.30	354.14
		6AS-RZ	6.52	14.70	20.98	327.33	2.45	12.72	779.92	801.32
		8AS-RZ	10.86	17.72	21.73	144.88	1.92	15.92	607.55	1241.98
		9AS-RZ	13.83	14.53	27.62	186.04	1.20	15.16	953.02	1769.38
		10AS-RZ	11.28	18.86	23.40	226.91	1.95	15.04	1032.18	1570.78
		11AS-RZ	14.54	15.01	22.71	238.26	2.50	13.45	995.32	1812.79
		12AS-RZ	23.27	14.51	17.71	308.42	2.31	13.00	1262.08	2033.20
		13AS-RZ	13.61	19.13	25.86	140.62	2.31	17.43	867.61	1250.05
		14AS-AL	15.78	15.20	27.24	111.08	1.65	16.77	1425.55	1857.01
		15AS-AL-2	18.03	13.29	58.91	173.34	1.23	33.86	1104.08	2131.51
		x̄	13.21	15.31	26.66	179.08	2.16	16.60	916.10	1523.09
		SD	4.85	2.00	10.25	80.95	0.91	5.39	294.00	501.15
		Min	3.48	13.11	17.71	30.42	0.72	12.72	377.30	354.14
		Max	23.27	19.13	58.91	327.33	3.85	33.86	1425.55	2131.51
	RS	7RS-GL	3.94	11.83	23.67	23.67	0.00	11.83	110.45	177.51
Limits		1	*0.4–1.0*	*15–20*	*100–200*	*30–70*		*40–60*	*25–115*	*100–200*
		2	1	20	*100*	*100*		50	60	*200*
		3	*10–20*	*100–250*	*200–300*	*150–200*		*100–150*	*200–750*	*250–400*
		4	*1.4*	40	64	63	5	45	70	*250*
		5	22	*300*	87	91	40	89	*600*	*410*

AS alluvial site, CS contaminated site, RS reference site (used to determine background values), RZ riparian zone, AL arable land, GL grassland, PEB probable environmental burden, CEB confirmed environmental burden. Signs mean: 1—Slovak threshold value of soil contamination in agricultural soil, 2—Finish threshold value of soil contamination, 3—Finish guideline values of soil contamination and remediation needs, 4—Canadian soil quality guidelines for the protection of environmental and human health for agricultural land, 5—Canadian soil quality guidelines for the protection of environmental and human health for industrial land. Normal letter means below all threshold values; bold letter means above at least one threshold value.

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Table 3 Total content (T) of heavy metals in the soil depth of 0–10 and 20–30 cm in contaminated, alluvial and reference sites with basic statistical characteristics compared to threshold and guideline values (mg/kg).

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