REMOVAL OF COPPER CONTENT IN JEWELRY INDUSTRY WASTEWATER USING COMMERCIAL ACTIVATED CARBONMARIA ANGELINA TUAS AND ALI MASDUQI
The jewelry industry wastewater generally contains copper metals. Removal of copper metal was carried out by adsorption using commercial activated carbon at varying sizes. The purpose of this research is to obtain the optimum adsorbent size, i.e. the size of the adsorbent that results in larger adsorption capacity. The results show that the adsorbent size of 10-20 mesh and 40-50 mesh has the maximum efficiency of removal of copper metal in the pH range of 7 to 8, with a mass of 2 g of adsorbent, and contact time for 4 hours at room temperature. The maximum percentage of copper removal was 20.90% and 17.81%, respectively, with commercial activated carbon of 10-20 mesh and 40-50 mesh. The results of the adsorption metal adsorption isotherm analysis with 10-20 mesh and 40-50 mesh adsorbents following Freundlich isotherm model with R2 values of 0.2929 and 0.9949, respectively. The adsorption kinetics follows a pseudo-order with R2 values of 0.998 and 0.992, for 10-20 mesh and 40-50 mesh adsorbents, respectively. The characterization of adsorbents with SEM shows differences in the surface image of activated carbon before and after being used for the adsorption process.
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