Bioavailability of CeO2 and SnO2 nanoparticles evaluated by dietary uptake in the earthworm Eisenia fetida and sequential extraction of soil and feed

Autor: Deborah Oughton, Turid Hertel-Aas, Erik J. Joner, Serena Carbone
Rok vydání: 2016
Předmět:
inorganic chemicals
Eisenia fetida
Environmental Engineering
Health
Toxicology and Mutagenesis
Soil biology
Metal Nanoparticles
02 engineering and technology
010501 environmental sciences
01 natural sciences
Soil
mental disorders
Animals
Soil Pollutants
Environmental Chemistry
Organic matter
Oligochaeta
health care economics and organizations
0105 earth and related environmental sciences
chemistry.chemical_classification
biology
Soil organic matter
Extraction (chemistry)
Earthworm
technology
industry
and agriculture
Public Health
Environmental and Occupational Health
Tin Compounds
Cerium
General Medicine
General Chemistry
respiratory system
021001 nanoscience & nanotechnology
biology.organism_classification
Pollution
Bioavailability
chemistry
Environmental chemistry
Ecotoxicity
0210 nano-technology
Zdroj: Chemosphere. 162:16-22
ISSN: 0045-6535
DOI: 10.1016/j.chemosphere.2016.07.044
Popis: The growing number of nanotechnology products on the market will inevitably lead to the release of engineered nanomaterials with potential risk to humans and environment. This study set out to investigate the exposure of soil biota to engineered nanoparticles (NPs). Cerium dioxide (CeO2 NPs) and tin dioxide nanoparticles (SnO2 NPs) were radiolabelled using neutron activation, and employed to assess the uptake and excretion kinetics in the earthworm Eisenia fetida. Through sequential extraction, NPs bioavailability in two contrasting soils and in earthworm feed was also investigated. Neither CeO2 NPs nor SnO2 NPs bioaccumulated in earthworms, and both were rapidly excreted when worms were transferred to clean soil. Low bioavailability was also indicated by low amounts of NPs recovered during extraction with non-stringent extractants. CeO2 NPs showed increasing mobility in organic soil over time (28 days), indicating that organic matter has a strong influence on the fate of CeO2 NPs in soil.
Databáze: OpenAIRE
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