The aim of this study was to investigate the impact of silver and cobalt, supplied both as ions and
nanoparticles (Ag+
, Co2+, AgNPs, CoNPs) through contaminated food to earthworms (Lumbricus rubellus),
on their health as well as on microbial community of both soil and earthworm faeces. Earthworms and
microbes were exposed to the contaminants in laboratory microcosms with artificial soil. Contaminants
were supplied once a week for 5 weeks by spiking them on horse manure. The accumulation of CoNPs and
Co2+ in earthworm tissues was two and three times greater than AgNPs and Ag+
, respectively. Except for
AgNPs,