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), 34-41. https://ijesmr.com/index.php/ijesmr/article/view/456