The effect on the zeta potential of surface modified Philippine natural zeolites (SM-PNZ) for the adsorption of anionic solutions

2nd Mineral Processing and Technology International Conference

工业技术（总论）;矿业工程

Barola, C.E.C.^1 ; Dusaban, I.F.C.^1 ; Olegario-Sanchez, E.M.^1 ; Mendoza, H.D.^1

Department of Mining Metallurgy and Materials Engineering, University of the Philippines, Diliman, Philippines^1

关键词: Anionic solutions;    Cationic exchange capacity;    Cetyltrimethylammonium bromide;    Natural zeolites;    Negative potential;    Percentage recovery;    Plate-like morphology;    Potential techniques;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/478/1/012039/pdf
DOI  :  10.1088/1757-899X/478/1/012039

学科分类：工业工程学

来源: IOP

【 摘 要 】

This study investigates the effect of surface modification on the surface charge of the natural zeolites (PNZ) from SAILE Industries in the Philippines by utilizing the zeta-potential technique. The SM-PNZ is prepared to be utilized in the adsorption of anionic aqueous solutions like gold cyanide [Au(CN)2-] solutions from gold extractive companies. The experiment was designed by converting natural zeolites into its Na-form and modified using cetyl trimethylammonium bromide (CTAB), a micelles-forming surfactant, with dosages equal to 100% and 200% of ECEC (external cationic exchange capacity) of the PNZ. Further characterization of the adsorbents by SEM shows a plate-like morphology. The zeta-potential of the SM-PNZ material shows a decreased negative surface compared with the unmodified PNZ. The percentage recovery of gold cyanide to the PNZ, SM-PNZ (100) and SM-PNZ (200) was 22%, 45% and 40% respectively. Surface modification has shown to improve the adsorption of the PNZ by decreasing the negative potential of the PNZ and increasing the affinity of the SM-PNZ to anionic solutions.