A contribution towards improving the applicability of the Myriophyllum aquaticum sediment contact test

Environmental Sciences Europe

Table 4 Inhibition values (%) based on M. aquaticum growth parameters and physico–chemical properties of natural sediments

Sediment toxicity**	T	T	T	NT	NT	T	T	T	T	T	NT	NT	NT	NT
Physico-chemical analysis
Sand, %	74	79	83	74	79	83	74	79	83	69.4	73.2	45.3	59.6	64.3	Thresholds
Silt and clay, %	13	8	15	13	8	15	13	8	15	28.4	23.7	28.3	25.4	21.4	TEC^a	PEC^a
Org. matter, %	3.8	7.69	6.94	8.1	8.54	2.75	2.07	7.56	8.18	9.16	10.1	26.4	15	14.4	TEC^a	PEC^a
Phenanthrene, µg/kg	5.53	2.27	6.64	8.28	2.03	10.7	17.6	27.3	95.7	16.08	80.5	835	14.7	29.6	204	1170
Fluoranthene , µg/kg	1.52	3.23	2.75	2.25	1.17	5.87	6.82	12.3	86.6	7.8	6.93	538	12.3	24.9	423	2230
Heptachlor, µg/kg	0	1.68	0	0	0	0	2.03	0	13.2	0	0	0	0	0	0.7^b	68^b
Hep. epoxide, µg/kg	22.6	55.3	2.03	0	3.18	5.29	0	0	0	0	0	0	0	0	2.47	16
Aldrin, µg/kg	1.39	0	0	0	0	0	0	0	0	0.32	0	0	0	0	0.06^b	6^b
Endrin, µg/kg	7.27	0	0	0	1.91	0	0	0	0	0	0	0	0	0	2.22	207
4,4’-DDE, µg/kg	1.07	0	1.55	0	1.04	0.8	0	1.02	0	0	1.17	0	0	0	3.16	31.3
4,4’-DDD, µg/kg	0	0	0	0	0.75	0	0	0	0	0	0	0	0	0	4.88	28
Sum PAH, µg/kg	1.52	2.23	2.75	2.25	1.17	7.14	31.4	35.9	340	n.m.	n.m.	n.m.	n.m.	n.m.	1610	22800
PCB sum, µg/kg	0	0	0	0	83.3	91.1	0	0	0	0	0	0	0	0	59.8	676
Mineral oils, mg/kg	1430	1480	1070	940	1480	1260	1250	1620	1490	0	3790	5619	0	57.2	50^b	3000^b
Cd, mg/kg	0.36	1.03	2.36	0.76	1.82	3.34	0	0.22	0.44	0	2.25	0	0.08	0.12	0.99	4.98
Pb, mg/kg	37.2	46.2	64.9	7.3	11.2	13.8	31.8	17.3	20.8	25.3	0	104.3	15.4	16.4	35.8	128
Hg, mg/kg	0.04	0.21	2.47	0.05	0.14	0.15	0.07	0.21	0.13	0.1	0	2.09	0.18	0.17	0.18	1.06
As, mg/kg	25.8	17.4	35.5	36.6	36.6	44.3	6.73	4.11	4.59	31.7	0	217	40.5	31.3	9.79	33
Ni, mg/kg	nm	nm	nm	nm	nm	nm	nm	nm	nm	nm	nm	147.7	8.24	8.91	22.7	48.6
Zn, mg/kg	nm	nm	nm	nm	nm	nm	nm	nm	nm	nm	nm	698.4	20.55	22.61	121	459
Cr, mg/kg	nm	nm	nm	nm	nm	nm	nm	nm	nm	nm	nm	1178	13.03	15.18	43.4	111
Cu, mg/kg	nm	nm	nm	nm	nm	nm	nm	nm	nm	nm	nm	347	16.55	15.49	31.6	149

RGR, relative growth rate; wFW, whorl fresh weight; sFW at d10-shoot fresh weight; sL, shoot length; rFW, root fresh weight; rL, root length; T, toxic; NT, not toxic; nm, not measured, 0, below the method detection limit (MDL) or the practical quantification limit (PQL)
* Significantly different from the corresponding test control [one-way ANOVA followed by t test, p ≤ 0.05)]
**Sediment toxicity based on the M. aquaticum test (I% RGR) according to Höss et al [13]
^a[MacDonald et al. 26], ^b [Official Gazette of Republic of Serbia, 50/12 Službeni Glasnik Republike Srbije 35]. Surpassed TEC or Serbian TV are marked with italics letters, while values above PEC and Serbian MAC are marked with underlined cell borders