Preparation and Optimization of Polyaniline /Titanium Dioxide /Carboxymethyl Cellulose Powder for Effective Nickel Adsorption

Hexanoic acid-doped polyaniline (PAni) PA ni) is a great potential candidate to replace conventional adsorbent towards the removal of heavy metal waste from electroplating industry, especially nickel (Ni). In this study, different weight % (wt %) of titanium dioxide (TiO2) 2 ) and carboxymethyl cellulose ( CMC ) are added to form PA ni composites with enhanced Ni removal efficiency. All the synthesized samples were examined with FTIR, UV-Vis, is, conductivity measurement, XRD, TGA, , and FESEM to confirm their chemical structures, oxidation states, electrical conductivity, crystallinity and incorporation of metal oxide, thermal stability, and surface morphology, respectively. Among the different samples, PA ni / TiO2 2 20 % exhibited the highest Ni removal efficiency of 37.5 %. Upon further addition of CMC, , PA ni / TiO2 2 / CMC 5 % showed the highest Ni removal efficiency of 89.08 %. Optimization of the experimental parameters were conducted and a maximum Ni removal efficiency of 97.88 % was achieved at pH 10, 30 min contact time at a temperature of 30 degrees C, and with an adsorbent dosage of 0.01 g. This study shows that the composite of PA ni / TiO2 2 / CMC 5 % shows good potential to be applied as adsorbent of the removal of Ni ions.