Influence of AgNPs Pollution on Carbon Dioxide Emission by Chernozem

A study was made of the effect of pollution with silver nanoparticles (AgNPs) on the emission of carbon dioxide by chernozem in an acute ecotoxicological experiment (the first 7 days from the moment of pollution). The ordinary chernozem was contaminated with AgNPs of various sizes (10, 100 and 1000 nm) at concentrations of 1, 10 and 100 mg/kg, as well as Ag2O (for comparison). As a result of the study, it was found that AgNPs with a size of 10 nm on the first day of the experiment on CO2 emission are less toxic than other sizes, but after 7 days of the experiment they become the most toxic. The greater the concentration of AgNPs, the greater the toxic effect on CO2 emission. The smaller the size of the nanoparticles, the greater the toxic effect. According to the degree of ecotoxicity, AgNPs form the following sequence: AgNPs (10 nm) > AgNPs (100 nm) > AgNPs (1000 nm).