Petrov, V.G. and Shumilova, M.A. 2020. A study of the mechanisms of adsorption of nickel ions by different types of soils in Udmurtia. Sorbtsionnye i Khromatograficheskie Protsessy. 20, 5 (Nov. 2020), 594-601. DOI:https://doi.org/10.17308/sorpchrom.2020.20/3052.