. 2023 Jun 20;45(8):6543–6565. doi: 10.1007/s10653-023-01647-z

Table 3.

Elemental concentrations in sediment

Parameter		Sediment element concentrations (mg kg⁻¹)
Sample origin (n)		Washing ponds (17)	Fishponds (2)	Stream/river (6)	Exhausted mine tailings (2)	Spring (6)	Control river (1)
As	Median	*345^	*10.1^	*62.4^	*906.9^	*35.1^	6.2
	95th percentile	*2680^	14^*	*155^	*975^	69^*	6
	European Union Standard	20	10	20	20	20	20
Cd	Median	0.17	0.1	0.08	0.99	0.06	0.13
	95th percentile	0.66	0.11	0.15	0.9	0.11	0.13
	European Union Standard	2.3	2.3	2.3	1.38	2.3	2.3
Cr	Median	*228^	*582^	*213^	*195^	*198^	*613^
	95th percentile	*972^	*1042^	*928^	*231^	*209^	*613^
	European Union Standard	81	81	81	81	81	81
Hg	Median	*6.1^	*2.4^	*3.9^	*2.39^	*7.2^	< 0.02
	95th percentile	*10.3^	*2.5^	*6.9^	*3.46^	*12.6^	< 0.02
	European Union Standard	0.15	0.15	0.15	0.15	0.15	0.15
Ni	Median	102*	203*	77*	33*	24*	95*
	95th percentile	190*	364*	184*	42*	58*	95*
	European Union Standard	21	21	21	21	21	21
Pb	Median	20.1	14.6	17.95	*387^	17.7	15.8
	95th percentile	154.5	15.32	40.48	*669^	35.9	15.8
	European Union Standard	120	120	120	120	120	120

Values in bold, italics with (*) exceed European Union Standards for elements in sediment (Tornero et al., 2019)