TY JOUR TI ANALYSIS OF THE SORPTION CAPACITY OF OPMN-P, OFAM-K, AND AMN-P MEMBRANES IN THE PROCESS OF NANOFILTRATION SEPARATION OF INDUSTRIAL SOLUTIONS OF PURIFICATION ENTERPRISES KW NANOFILTRATION MEMBRANES KW METAL IONS KW CONCENTRATION OF SOLUTIONS KW PARTITION COEFFICIENT KW FREUNDLICH EQUATION JO Herald of Technological University AU Lazarev, S.I. AU Istomina, M.A. AU Dolgova, O.V. AU Gutnik, I.V. PY 2026 IS 29 PB Kazan National Research Technological University