SORPTION AND STUDY OF IONS OF Cu(II), Zn(II) AND Ni(II) IN SYNTHESISED SORBENT BASED ON UREA, FORMALDEHYDE AND DIPHENYLCARBAZONE. Scientific journal of the Fergana State University, [S. l.], v. 30, n. 6, p. 110, 2025. Disponível em: https://journal.fdu.uz/index.php/sjfsu/article/view/5484. Acesso em: 9 jan. 2026.