Analysis of Bio-Obtainable Endocrine Disrupting Metals in River Water and Sediment, Sewage Influent/Effluent, Sludge, Leachate, and Concentrated Leachate, in the Irish Midlands Shannon Catchment

Table 3

Metal content in river sediment in the Irish midlands region (mg/𝑘𝑔_dw) over a six-month period, 2004-2005.

					Sediment		Concentration		(mg/kgdw)
Metal	Target^† value (mg/kg)	Intervention^† value (mg/kg)	Site no.	Overall average result*	Nov	Dec	Jan	Feb	Mar	Apr	Mean % RSD
Ni	35.0	100.0	1	<TV, <IV	22	25	29	27	21	46	2.6
			2	<TV, <IV	36	55	28	29	26	15	1.9
			3	<TV, <IV	25	32	26	33	31	20	4.1
			4	<TV, <IV	70	27	4	26	27	19	4.3
Mn	U	U	1	—	402	334	81	113	198	505	4.1
			2	—	495	1050	130	64	26	271	3.4
			3	—	246	244	271	102	102	241	4.5
			4	—	484	112	86	90	89	207	6.9
Cd	0.8	12.0	1	>TV, >IV	<LOD	9	14	20	30	20	9.8
			2	>TV, >IV	<LOD	15	12	26	32	15	11.2
			3	>TV, >IV	1	13	19	19	25	18	9.6
			4	>TV, >IV	16	16	14	28	29	18	7.8
Zn	140.0	720.0	1	<TV, <IV	82	74	117	56	118	277	0.5
			2	<TV, <IV	59	101	74	55	156	132	0.6
			3	<TV, <IV	110	132	149	170	179	59	0.6
			4	<TV, <IV	81	170	45	132	161	144	0.3
Co§	9.0	33.0	1	>TV, <IV	19	18	15	11	17	16	5.9
			2	>TV, <IV	19	26	21	18	19	10	5.2
			3	>TV, <IV	2	29	18	18	16	12	6.7
			4	>TV, <IV	48	22	7	16	16	11	7.1
Pb	85.0	530.0	1	>TV, <IV	141	220	210	140	235	170	1.1
			2	>TV, <IV	141	223	228	145	255	185	1.3
			3	>TV, <IV	188	350	358	150	415	285	1.6
			4	>TV, <IV	296	350	140	128	495	330	1.3
Cr	100.0	380.0	1	<TV, <IV	45	39	61	46	39	10	9.6
			2	<TV, <IV	49	59	115	35	34	9	7.4
			3	<TV, <IV	40	42	54	35	42	10	8.4
			4	<TV, <IV	124	42	12	27	28	10	10.8
Cu	36.0	190.0	1	<TV, <IV	23	14	36	39	11	29	1.2
			2	<TV, <IV	14	22	6	9	7	8	2.3
			3	>TV, <IV	100	81	17	36	29	20	1.1
			4	<TV, <IV	15	20	1	6	98	16	4.3

U: unknown. Note: Site no. 5 has been omitted as sediment was only procured for a single month due to a consistently high water level and high currents. *<TV is below the target value, >TV is above the target value, and <IV is below the intervention value, whilst >IV is above the intervention value.
^†Amalgamated Dutch values for soils and sediments and Danish values for soils [3, 4, 23].