Abstract：
:Perfluorooctane sulfonate (PFOS) is a persistent organic pollutant, which has been detected at significant concentrations in soils at sites used for fire-fighting training operations. Recent ecotoxicological research has mainly focused on earthworms to assess the toxicity of PFOS in soil. However, the inclusion of other soil taxonomic groups allow for a more holistic estimate of contaminant risk, including the derivation of more comprehensive soil quality guidelines. The present study assessed the toxicity of PFOS using the collembolan, Folsomia candida, and the oribatid mite, Oppia nitens, in two types of soil: a coarse-textured sandy loam (VSL) and fine-textured clay loam (NRS). As a standard O. nitens reproduction test is being formalized, the results of the study were also used to compare sensitivity across test species. Effects were soil dependent, with test species being 2-4 times more susceptible to PFOS in VSL, relative to NRS, likely due to differences in organic matter and clay content. Oppia nitens was significantly more sensitive to PFOS, regardless of soil type, in comparison to F. candida. The IC50s for reproduction for O. nitens were 23 mg kg-1 (95% confidence interval: 17-32 mg kg-1) in the VSL and 95 mg kg-1 (69-134 mg kg-1) in the NRS, and for F. candida were 94 mg kg-1 (72-122 mg kg-1) in the VSL and 233 mg kg-1 (177-306 mg kg-1) in the NRS. The present study demonstrates the application and inclusion of the oribatid mite, O. nitens, for the risk assessment of contaminants in soil.
journal_name
Chemospherejournal_title
Chemosphereauthors
Princz J,Jatar M,Lemieux H,Scroggins Rdoi
10.1016/j.chemosphere.2018.06.020subject
Has Abstractpub_date
2018-10-01 00:00:00pages
757-763eissn
0045-6535issn
1879-1298pii
S0045-6535(18)31094-4journal_volume
208pub_type
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