Zilfa, Rahmayeni, B. Arifin
2021
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Abstract
This research investigated the degradation of Naphthol Blue-Black dye, an azo compound used in dying weaving in Kubang using Clinoptilolite-Ca TiO2 / Zeolite as a catalyst. Waste from this compound is harmful to humans, animals, and plants. Degradation was carried out using a UV lamp at a wavelength of 365 nm. To improve the degradation yield, TiO2 is supported by the natural zeolite of Clinoptilolite-Ca. TiO2 is the best semiconductor catalyst, while zeolite Clinoptilolite-Ca is a natural zeolite that can expand the surface of TiO2. It was found that maximum absorption of Naphthol Blue-Black was at 235 nm and after 120 minutes of irradiation the degradation yields were: without catalyst 20.58% after 120 minutes, with 0.4 g of Clinoptilolite-Ca TiO2 / Zeolite 71.68%, with 0.02 g of TiO2 alone 51.92%, and with 0.38 g of zeolite alone 32.21%. When the was used without time limitations in a simulated treatment situation, the degradation of Naphthol Blue-Black dye achieved with the TiO2 / zeolite catalyst was 94.20% in the laboratory and 90.30% when used on weaving wastewater. FTIR analysis of Naphthol Blue-Black before and after degradation showed a shift in wavenumbers, indicating a change in functional groups. However, FTIR and XRD characterization of the TiO2 zeolite catalysts indicated no change in structure.