Toxicity of silver nanoparticles to Lumbriculus variegatus is a function of dissolved silver and promoted by low sediment pH

6533b7d6fe1ef96bd1267190

RESEARCH PRODUCT

Toxicity of silver nanoparticles to Lumbriculus variegatus is a function of dissolved silver and promoted by low sediment pH

Eeva-riikka Vehniäinen Juho E. Rajala Jussi V. K. Kukkonen Ari Väisänen

subject

Geologic Sediments Lumbriculus variegatus Health Toxicology and Mutagenesis benthic worms Metal Nanoparticles sedimentit 02 engineering and technology 010501 environmental sciences 01 natural sciences Silver nanoparticle chemistry.chemical_compound madot Biomass ta116 biology Hydrogen-Ion Concentration 021001 nanoscience & nanotechnology 6. Clean water ekotoksikologia Silver nitrate Environmental chemistry Toxicity 0210 nano-technology medicine.drug silver nanoparticles Silver sekvensointi ta1172 myrkyllisyys Toxicity Tests medicine Animals Environmental Chemistry sequential extraction Oligochaeta nanoecotoxicology 0105 earth and related environmental sciences No-Observed-Adverse-Effect Level Polyvinylpyrrolidone hopea Sediment biology.organism_classification sediment toxicity Solubility uutto chemistry 13. Climate action nanohiukkaset nanoparticles Water Pollutants Chemical

description

Toxicity of silver nanoparticles (AgNPs) to benthic organisms is a major concern. The use of AgNPs in industry and consumer products leads to increasing release of AgNPs into the aquatic environment-sediments being the major sink. Effects of sediment pH on the toxicity of AgNPs to benthic oligochaeta Lumbriculus variegatus were studied in a 23-d toxicity test. Artificially prepared sediments (pH 5 and 7) were spiked with varying concentrations of uncoated AgNP, polyvinylpyrrolidone (PVP)-coated AgNP, and silver nitrate (AgNO3 ) as dissolved Ag reference. Number of individuals and biomass change were used as endpoints for the toxicity. The toxic effects were related to the bioaccessible concentration of dissolved Ag in the sediments, assessed with a 2-step extraction procedure. The toxicity of 2 AgNPs was similar and greatly enhanced in the acidic sediment. Because the toxic effects were well related to the bioaccessible concentration of dissolved Ag in the sediments, the toxicity of sediment-associated AgNPs to L. variegatus is suggested to be a function of dissolved Ag rather than a result from NP-specific modes of toxicity. Environ Toxicol Chem 2018;37:1889-1897. © 2018 SETAC.

year	journal	country	edition	language
2017-10-23	Environmental Toxicology and Chemistry

https://doi.org/10.1002/etc.4136