Biotoxicity of heavy metal salts to Bacillus subtilis and their sorption properties Aleksey Sizentcov, Elena Sal’nikova, Elena Barysheva, Yaroslav Sizentcov and Veronika Sal’nikova E3S Web Conf., 157 (2020) 02012 Published online: 20 March 2020 DOI: 10.1051/e3sconf/202015702012