SORPTION OF Co2+, Cu2+, Zn2+ and Mn2+ METAL IONS FROM AQUEOUS SOLUTIONS ON ANIONIC SURFACTANT-MODIFIED BENTONITE. Proc. YSU B: Chem. Biol. Sci. 2019, 53 (2 (249), 81-85. https://doi.org/10.46991/PYSUB.2019.53.2.081.