A NEW CHITOSAN BIOPOLYMER DERIVATIVE FOR THE REMOVAL OF COPPER (II) AND LEAD (II) FROM AQUEOUS SOLUTIONS: SYNTHESIS, CHARACTERIZATION AND ADSORPTION STUDIES. J. Teknol. [Internet]. 2017 Aug. 28 [cited 2024 Nov. 26];79(6). Available from: https://journals.utm.my/jurnalteknologi/article/view/10534