Silver nanoparticles (AgNPs) are present in biosolids from wastewater treatment facilities, a common soil amendment. Exposing earthworms (Eisenia fetida) to AgNP and AgNO3 in soil with 0 and 7.5 g biosolids kg−1 for 28 days showed AgNO3 was more lethal to earthworms in artificial soil (LC20 ≤ 325 mg Ag kg−1) than natural soil (LC20 ≥ 573 mg Ag kg−1). In contrast, AgNPs were more lethal in natural soil (LC20 ≤ 425 mg Ag kg−1) than artificial soil (LC20 ≥ 653 mg Ag kg−1). Earthworm response to silver in artificial soil may not reflect toxicity in biosolids-amended natural soils.
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24 February 2024
Silver toxicity to the earthworm Eisenia fetida is inconsistent in natural and artificial soils amended with wastewater biosolids
Aboulkacem Lemtiri,
Yu Jia,
Leanne Ejack,
Ismail S. Akaram,
Haroldo S. Dórea,
Gilles Colinet,
Frederic Francis,
Subhasis Ghosal,
Geoffrey I. Sunahara,
Joann K. Whalen
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Canadian Journal of Soil Science
Vol. 104 • No. 2
June 2024
Vol. 104 • No. 2
June 2024
ecotoxicology
OECD soil
silver ions
Silver nanoparticles
soil biota
soil macrofauna
