What are the effects of soil treatment procedures (sterilization by γ-irradiation and solvent-assisted spiking) on DDE bioaccumulation by earthworms?
| Autor: | Lucia Škulcová, Lucie Bielská, Kerstin E. Scherr, Jakub Hofman |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Dichlorodiphenyl Dichloroethylene
Health Toxicology and Mutagenesis Eisenia andrei 010501 environmental sciences Toxicology 01 natural sciences Soil Animals Soil Pollutants Organic matter Oligochaeta Organic Chemicals 0105 earth and related environmental sciences chemistry.chemical_classification biology Chemistry Soil organic matter Earthworm Sterilization 04 agricultural and veterinary sciences General Medicine 15. Life on land Sterilization (microbiology) biology.organism_classification Pollution Solvent Gamma Rays 13. Climate action Environmental chemistry Bioaccumulation Soil water Solvents 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental Pollution Hydrophobic and Hydrophilic Interactions |
| Zdroj: | Environmental Pollution. 243:1479-1486 |
| ISSN: | 0269-7491 |
| DOI: | 10.1016/j.envpol.2018.09.111 |
| Popis: | Ionizing γ-irradiation and solvent-assisted spiking are frequently applied to eliminate microbial activity and to induce hydrophobic organic compounds (HOCs) into soil, respectively, when studying the accumulation of chemicals in terrestrial organisms. However, the side-effects that may arise from these treatments on soil-HOC interaction and, subsequently, the kinetics and extents of bioaccumulation are not thoroughly understood. To this end, the accumulation of 1,1-dichloro-2,2-bis(p-chlorophenyl)etylene (p,p’-DDE) by Eisenia andrei was studied in sterilized or unsterilized and freshly spiked (FS) or historically contaminated (HC) soils in parallel with an analysis of aliphatic and hydrophilic soil organic matter (SOM) moieties using mid-infrared diffuse reflectance spectroscopy (DRIFT-S). Irradiation did not impart significant changes on spectral SOM descriptors. In contrast, earthworm inhabitation increased the relative presence of aliphatic moieties to a greater extent than hydrophilic ones, reaching or exceeding pre-treatment levels. Overall, effects on SOM chemistry can be ranked as earthworms > spiking > irradiation. Corresponding changes at the bioaccumulation level were observed for the FS soil (i.e., a 27% reduction in bioaccumulation upon sterilization) but not for the HC soil. This implies that in contrast to the interactions between aged p,p’-DDE and sterilized HC soil, the interactions established between freshly added p,p’-DDE and sterilized FS soil were altered by γ-irradiation-induced secondary effects alone or in combination with earthworm inhabitation. Thus, although the soil treatment processes studied here should not drastically impact compound bioaccumulation, they should be considered in mechanistic studies where the qualitative and quantitative aspects of compound-soil (organic matter)-earthworm interactions are at the centre of attention. |
| Databáze: | OpenAIRE |
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