Arsenic toxicity to earthworms in soils of historical As mining sites: an assessment based on various endpoints and chemical extractions
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Published:2023-06-27
Issue:8
Volume:45
Page:6713-6726
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ISSN:0269-4042
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Container-title:Environmental Geochemistry and Health
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language:en
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Short-container-title:Environ Geochem Health
Author:
Karczewska AnnaORCID, Gruss IwonaORCID, Szopka KatarzynaORCID, Dradrach AgnieszkaORCID, Twardowski JacekORCID, Twardowska KamilaORCID
Abstract
AbstractEisenia fetida is an earthworm species often used to assess the toxicity of contaminants in soils. Several studies indicated that its response can be unpredictable because it depends both on total concentrations of contaminants and also on their forms that differ in susceptibility to be released from soil solid phase. The issue is complex because two various uptake routes are concurrently involved, dermal and ingestion in guts, where the bioavailability of contaminants can considerably change. The aim of this study was to analyze the toxicity of arsenic (As) in various strongly contaminated meadow and forest soils, representative for former As mining and processing area, to earthworms E. fetida and its accumulation in their bodies. An attempt was made to find relationships between the response of earthworms and chemical extractability of As. In the bioassay, carried out according to the standard ISO protocol, different endpoints were applied: earthworm survival, fecundity measured by the numbers of juveniles and cocoons, earthworm weight and As accumulation in the bodies. The results proved that E. fetida can tolerate extremely high total As concentrations in soils, such as 8000 mg/kg, however, the individual endpoints were not correlated and showed different patterns. The most sensitive one was the number of juveniles. No particular soil factor was identified that would indicate an exceptionally high As susceptibility to the release from one of soils, however, we have demonstrated that the sum of non-specifically and specifically bound As (i.e. fractions F1 + F2 in sequential extraction according to Wenzel) could be a good chemical indicator of arsenic toxicity to soil invertebrates.
Funder
Narodowe Centrum Nauki Uniwersytet Przyrodniczy we Wrocławiu
Publisher
Springer Science and Business Media LLC
Subject
Geochemistry and Petrology,General Environmental Science,Water Science and Technology,Environmental Chemistry,General Medicine,Environmental Engineering
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