Silver toxicity to the earthworm Eisenia fetida is inconsistent in natural and artificial soils amended with wastewater biosolids
CANADIAN JOURNAL OF SOIL SCIENCE(2024)
Abstract
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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Key words
ecotoxicology,OECD soil,silver ions,silver nanoparticles,soil macrofauna,soil biota
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