Table 8.
Potentially toxic trace element concentrations in seaweeds (mg/kg DM).
| Trace Element | Brown Seaweed 1 | Green Seaweed 2 | Red Seaweed 3 | Feed 4 | Feed Ingredient 4 | Ref. |
|---|---|---|---|---|---|---|
| Cadmium | 0.05–8 | 0.03–4 | 0.04–3.8 | 0.5 (1 *) | 1 | [19,21,39,133] |
| Mercury | <0.005–0.16 | 0.005–0.07 | <0.005–0.03 | 0.1 (0.2 *) | 0.1 | [19,21,39,133] |
| Lead | 0.01–7 | 0.05–7 | 0.01–19 | 5 | 10 | [19,21,133] |
| Arsenic | 8–120 | 0.8–18 | 1–50 | 2 (10 *) | 40 | [19,21,39,133] |
| Inorganic arsenic | 0.03–7.7 | 0.2–0.4 | 0.03–0.6 | – | – | [21,133] |
1Brown seaweed: Alaria esculenta, Ascophyllum nodosum, Fucus spiralis, Fucus vesicolosus, Himanthalia elongate, Laminaria digitata, Lamibaria hyperborea, Laminaria spp., Pelvetia canaliculata, Saccharina latissima Sargassum fusiformis, Undaria pinnatififda; 2 Green seaweed: Cladophora rupestris, Codium adhaerens, Codium vermilara, Enteromorpha intestinalis, Ulva lactuca, Ulva spp.; 3 Red seaweed: Chondrus crispus, Gigartina spp., Gracilaria vericulophylla, Gracilaria spp., Palmaria palmata, Polysiphonia lanosa, Porphyra spp.; 4 UE directive 2002/32/EC and amendments; * Fish feed.