“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” (2018) International Journal of Engineering Sciences & Management Research, 5(4), pp. 34–41. Available at: https://ijesmr.com/index.php/ijesmr/article/view/456 (Accessed: 4 February 2026).