TY JOUR TI PERSPECTIVE SULFUR-CONTAINING ORGANOPHOSPHORUS EXTRACTANTS OF HEAVY METALS KW phosphorus KW sulfur KW synthesis KW extraction KW sulfur-containing KW organophosphorus KW phosphine sulfides KW heavy metal extractants JO Modern Technologies and Scientific and Technological Progress AU Nalibaeva, A.M. AU Bishimbaeva, G.K. AU Gusarova, N.K. AU Verhoturova, S.I. AU Trofimov, B.A. AU Zhanabaeva, A.K. AU Abdikalykov, E.N. PY 2022 IS 2021 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»