PREPARATION AND CHARACTERIZATION OF GUARGUM 5-AMINO-1-NAPHTHOL-3-SULPHONIC ACID (GANSA) RESIN AND ITS USE FOR SEPARATION OF HEAVY METAL IONS FROM INDUSTRIAL WASTEWATER. International Journal of Engineering Sciences & Management Research, [S. l.], v. 5, n. 4, p. 34–41, 2018. Disponível em: https://ijesmr.com/index.php/ijesmr/article/view/456. Acesso em: 7 apr. 2026.