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 [Internet]. 2018 Apr. 30 [cited 2026 Apr. 7];5(4):34-41. Available from: https://ijesmr.com/index.php/ijesmr/article/view/456