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. IJESMR. 2018;5(4):34-41. Accessed February 4, 2026. https://ijesmr.com/index.php/ijesmr/article/view/456