Efficiency of Zinc (II) Metal Ion Adsorption Using Fe3O4/Clay Composites from Bangka

Abstract

Research on the adsorption efficiency of Zn2+ metal ions has been carried out using a composite Fe₃O₄-clay from Bangka. This study aims to determine the characteristics of Fe₃O₄-clay composites using FTIR and XRD, determine the adsorption efficiency of Zn²⁺ metal ions by activated natural clay, Fe₃O₄, and Fe₃O₄-clay composites (1:1, 1:2 and 1:3) and determine the effect of concentration. on the adsorption efficiency of Zn²⁺ metal ions by the Fe₃O₄-clay composite. The results of FTIR and XRD analysis showed that the Fe₃O₄-clay composite was successfully synthesized. Based on the results of characterization by FTIR on Fe₃O₄-clay, it shows the formation of composites with the absorption peak at wave numbers 3685 cm^-1 and 683,89 cm^-1 which were absorption peaks of clay and at wave number 3448,32 cm^-1 is the absorption peak. This absorption peak allowed to bind with clay. In addition, the XRD analysis results of Fe₃O₄-clay composite showed a diffraction peak at 2θ = 12,23^o; 20,83^o; 24,83^o; 26,6^o; 30,48^o; 35,625^o and 62,5^o which consist of clay and Fe₃O₄. The adsorption efficiency of activated natural clay, Fe₃O₄, Fe₃O₄-clay (1:1, 1:2 and 1:3) could absorb Zn²⁺ metal ions, respectively 99,18%, 44,76%, 99,25%, 94,63% and 76,25%, with the highest adsorption efficiency found in the Fe₃O₄-clay composite (1:1). The adsorption efficiency of Zn²⁺ metal ions by the Fe₃O₄-clay (1:1) composite reached 49,57% at a Zn²⁺ metal ion concentration of 20 mg/L.