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EC number: 266-972-5 | CAS number: 67711-95-9 A complex combination of insoluble compounds which precipitate during copper electrolytic refining.
Bioaccumulation/bioconcentration factors in soil: 0.39 kg/kg (dry weight)
Bioaccumulation factors (BAFs) for Pb from to soil to earthworms are summarised in the voluntary risk assessment of lead, VRAL(LDAI, 2008). A median BAF for earthworms on a dry weight basis is 0.39 kgdw/kgdw (median of 101 values) and 10-90thpercentiles are 0.13-1.17. On a fresh tissue weight basis, BAF values are 0.10 kgdw/kgww(median) and 0.03-0.27 (10-90thpercentiles). The influence of soil properties on the BAF of earthworms (A. calluginosa) was studied in different soils and the equation describing the BAF as a function of pH reads, with BAF on a wet weight basis (kgdw/kgww)
(Ma, 1982). This equation predicts that the median BAF of the 101 data points above (BAF= 0.10 kgdw/kgww) is found at pH=6.5. At pH 4.5, this BAF is 4-fold larger. There is no significant effect of total soil Pb on the BAFs (LDAI, 2008).
A few literature data are available for bioaccumulation of Pb in isopods from soil or litter, 14 BAFs were collected and listed inTable12. Values range from 0.001-0.65 kgdw/kgdw. A median BAF for isopods on a dry weight basis is 0.04 (median of 14 values).
Table14: Bioaccumulation factors between soil or decomposed leaf litter and isopods. The Pb concentrations in the biota are the product of BAF and soil Pb concentration.
Soil/litter (mg Pb/kgdw)
15 adult specimen were exposed for 14 days to approximately 600 mL of air-dried experimental soil (polluted and remediated with 2.5, 10, 40 and 4 x 40 EDTA, respectively) in plastic vessels with plastic covers.
Udovic et al. 2009
polluted soil leached with 2.5 mmol kg-1EDTA
polluted soil leached with 10 mmol kg-1EDTA
polluted soil leached with 40 mmol kg-1EDTA
polluted soil leached with 4 x 40 mmol kg-1EDTA
Isopods were kept in plastic boxes on a moist gypsum base covered by decomposed leaf litter material, i.e. partly decomposed leaf litter material soaked in an aqueous solution of 100, 500 or 1000 mg l–1 Pb2+(as PbCl2).
Gräff et al. 1997
100 mg Pb/l
500 mg Pb/l
1000 mg Pb/l
Near a smelting complex a transect of 5 soil sampling sites was taken
0.3 km from the smelting complex
0.5 km from the smelting complex on the other side of the low hill
1 km from the smelting complex
2.5 km from the smelting complex
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