TY CONF TI ANALYSIS OF EXISTING METHODS OF ELECTROCHEMICAL PURIFICATION OF TECHNOLOGICAL SOLUTIONS FOR THE PRODUCTION OF PIGMENTS KW Analysis of methods KW membrane KW technological solutions KW electrochemical purification JO CIRCULAR ECONOMY FOR THE PURPOSE OF SUSTAINABLE DEVELOPMENT OF INDUSTRIES AND TERRITORIES AU Lomakina, V.A. PY 2024 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov