STUDY OF THE DEPENDENCE OF SORPTION OF BICHROMATE IONS BY AN-31 ANION EXIT ON THE PH OF THE MEDIUM SOLUTION. Scientific journal of the Fergana State University, [S. l.], v. 30, n. 5, p. 63, 2024. Disponível em: https://journal.fdu.uz/index.php/sjfsu/article/view/5279. Acesso em: 11 mar. 2026.