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Assessment of the ecotoxicity of silver chemical compounds by indicators of phytotoxicity of ordinary chernozem

The study assessed the ecotoxicity of various chemical compounds of silver (nitrate, oxide, sulfide, nanoparticles) by indicators of phytotoxicity of ordinary chernozem. The effect of nitrate, oxide, sulfide and silver nanoparticles in concentrations of 0.5; 1; 5; 10; 50 and 100 mg/kg of ordinary chernozem on the germination and length of radish roots 30 days after contamination was evaluated. In most cases, a negative effect of silver chemical compounds on phytotoxic indicators of ordinary chernozem was noted. The degree of ecotoxicity of silver is affected by its concentration in the soil. Silver nitrate, which is highly soluble in water and provides greater mobility of silver in the soil in the form of Ag2+, has a somewhat greater ecotoxicity. Practically insoluble in water forms showed slightly less negative impact. According to the germination of radish, a number of toxicity of chemical compounds (% of control) has been compiled: nitrate (84) > sulfide (87) > oxide (88) > nanoparticles (91); according to the length of the radish roots, a number of toxicity of chemical compounds of silver (% of the control) has been compiled: nitrate (90) > oxide (95) ≥ nanoparticles (95) ≥ sulfide (95). Keywords: SOIL, NITRATE, OXIDE, SULFIDE, NANOPARTICLES, GERMINATION, ROOT LENGTH, CONTAMINATION