Abstract
The present study investigated the bioavailability and toxicity of lead to the potworm Enchytraeus crypticus in six soils with different properties. Pb partitioning between the soil solution and solid phase was affected by soil organic matter (OM) content, cation exchange capacity (CEC) and water holding capacity (WHC). After 21 d exposure, Pb bioaccumulation in the enchytraeids was positively correlated with total soil Pb concentration. Bioaccumulation was best predicted by Pb availability (CaCl2-extractable and porewater Pb concentrations), and by the Ca concentration in pore water and the CEC of the soils. Toxicity varied greatly among soils, with LC50s and EC50reproductions based on total Pb concentrations ranging from 246 to >3092 and from 81 to 1008 mg Pb/kg dry soil, respectively. The variation in LC50s among soils was explained by differences in CaCl2-extractable Pb concentrations in soil and internal Pb concentrations in the animals. The differences in EC50reproductions could be explained from the CaCl2-extractable Pb concentrations in the soils. Although it was also correlated with CEC and porewater Ca concentration, pHCaCl2 was the dominating factor for predicting Pb toxicity based on total soil concentrations. This study demonstrates that soil properties, such as pH, CEC and Ca concentration in pore water, significantly affected the bioavailability and toxicity of Pb and therefore should be taken into account when assessing the ecological risk of metals in contaminated soils.
| Language | English |
|---|---|
| Pages | 9-17 |
| Number of pages | 9 |
| Journal | Chemosphere |
| Volume | 217 |
| Early online date | 22 Oct 2018 |
| DOIs | |
| Publication status | Published - Feb 2019 |
Keywords
- Lead
- Soil properties
- Toxicity
- Bioavailability
- Enchytraeus crypticus
Cite this
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Effect of soil properties on Pb bioavailability and toxicity to the soil invertebrate Enchytraeus crypticus. / Zhang, Lulu; Verweij, Rudo A.; Van Gestel, Cornelis A.M.
In: Chemosphere, Vol. 217, 02.2019, p. 9-17.Research output: Contribution to Journal › Article › Academic › peer-review
TY - JOUR
T1 - Effect of soil properties on Pb bioavailability and toxicity to the soil invertebrate Enchytraeus crypticus
AU - Zhang, Lulu
AU - Verweij, Rudo A.
AU - Van Gestel, Cornelis A.M.
PY - 2019/2
Y1 - 2019/2
N2 - The present study investigated the bioavailability and toxicity of lead to the potworm Enchytraeus crypticus in six soils with different properties. Pb partitioning between the soil solution and solid phase was affected by soil organic matter (OM) content, cation exchange capacity (CEC) and water holding capacity (WHC). After 21 d exposure, Pb bioaccumulation in the enchytraeids was positively correlated with total soil Pb concentration. Bioaccumulation was best predicted by Pb availability (CaCl2-extractable and porewater Pb concentrations), and by the Ca concentration in pore water and the CEC of the soils. Toxicity varied greatly among soils, with LC50s and EC50reproductions based on total Pb concentrations ranging from 246 to >3092 and from 81 to 1008 mg Pb/kg dry soil, respectively. The variation in LC50s among soils was explained by differences in CaCl2-extractable Pb concentrations in soil and internal Pb concentrations in the animals. The differences in EC50reproductions could be explained from the CaCl2-extractable Pb concentrations in the soils. Although it was also correlated with CEC and porewater Ca concentration, pHCaCl2 was the dominating factor for predicting Pb toxicity based on total soil concentrations. This study demonstrates that soil properties, such as pH, CEC and Ca concentration in pore water, significantly affected the bioavailability and toxicity of Pb and therefore should be taken into account when assessing the ecological risk of metals in contaminated soils.
AB - The present study investigated the bioavailability and toxicity of lead to the potworm Enchytraeus crypticus in six soils with different properties. Pb partitioning between the soil solution and solid phase was affected by soil organic matter (OM) content, cation exchange capacity (CEC) and water holding capacity (WHC). After 21 d exposure, Pb bioaccumulation in the enchytraeids was positively correlated with total soil Pb concentration. Bioaccumulation was best predicted by Pb availability (CaCl2-extractable and porewater Pb concentrations), and by the Ca concentration in pore water and the CEC of the soils. Toxicity varied greatly among soils, with LC50s and EC50reproductions based on total Pb concentrations ranging from 246 to >3092 and from 81 to 1008 mg Pb/kg dry soil, respectively. The variation in LC50s among soils was explained by differences in CaCl2-extractable Pb concentrations in soil and internal Pb concentrations in the animals. The differences in EC50reproductions could be explained from the CaCl2-extractable Pb concentrations in the soils. Although it was also correlated with CEC and porewater Ca concentration, pHCaCl2 was the dominating factor for predicting Pb toxicity based on total soil concentrations. This study demonstrates that soil properties, such as pH, CEC and Ca concentration in pore water, significantly affected the bioavailability and toxicity of Pb and therefore should be taken into account when assessing the ecological risk of metals in contaminated soils.
KW - Lead
KW - Soil properties
KW - Toxicity
KW - Bioavailability
KW - Enchytraeus crypticus
UR - http://www.scopus.com/inward/record.url?scp=85057190062&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85057190062&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2018.10.146
DO - 10.1016/j.chemosphere.2018.10.146
M3 - Article
VL - 217
SP - 9
EP - 17
JO - Chemosphere
T2 - Chemosphere
JF - Chemosphere
SN - 0045-6535
ER -