TY JOUR TI STUDY OF UTILIZATION OF NI2+-CONTAINING WASTE AS A CATALYST FOR THE OXIDATION PROCESS OF HYDROCARBONS KW SULFUR-ALKALINE WASTEWATER KW SPENT GALVANIC SOLUTION KW PURIFICATION KW OZONATION KW CATALYST KW HYDROCARBONS KW NICKEL (II) OXIDE JO Herald of Technological University AU Savelyev, S.N. AU Savel'eva, A.V. AU Skarlygina, L.A. PY 2025 IS PB Kazan National Research Technological University