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All Journal Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Atiqa Rahmawati
Department of Leather Processing Technology, Politeknik ATK Yogyakarta, 55188, Special Distric of Yogyakarta, Indonesia

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SYNTHESIS KALIUM ALUMUNIUM SULPHATE (ALUM) FROM ALUMUNIUM FOIL WASTE USING KOH AND H2SO4 Atiqa Rahmawati
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 22 No. 1 (2023): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/f4h19h54

Abstract

The increase in the culinary industry certainly must be balanced with the packaging waste generated. The waste from aluminum foil is one of the wastes produced. Over 8 tons of aluminum foil waste are generated each month in East Java. Waste that has been piled up is only given to third parties. It takes about 400 years for aluminum foil to breakdown and decompose in the soil. Aluminum foil waste can generate environmental pollution. As waste pollution increases, alternatives are needed to convert waste into useful materials. Aluminum foil can be utilized as a raw material for the production of potassium aluminum sulfate due to its high aluminum content. The objective of this study is to utilize aluminum waste into potassium aluminum sulfate. The concentrations of KOH and H2SO4 are the two variables combined. In this study, the yield value, pH analysis, melting point, and Al2O3 content of alum will be determined. The results showed that 2 M KOH and 4.5 M H2SO4 had the highest yield of 88.3580, pH 3,08; melting point 92 °C; and Al2O3 concentration 15,5%. Potassium aluminum sulfate performed physical analysis, including analyses of pH, melting point, and Al2O3 concentration. Alum has a pH of about 3, and its melting point is between 92 and 93 °C, while the Al2O3 content ranges between 9 and 11%. Kalium alumnium sulfate meets the SNI 0032:2011 standards for physical pH and melting point analysis. However, the Al2O3 content does not meet to SNI 0032:2011.
OPTIMIZATION ADSORPTION OF HEXAVALEN CHROMIUM (CR-VI) IN ACTIVATED CARBON (MICROWAVE-ASSISTED ZNCL2 CHEMICAL-ACTIVATION) USING TAGUCHI METHOD Atiqa Rahmawati; Fadzkurisma Robbika; Yuafni
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 22 No. 2 (2023): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/s6prsw97

Abstract

The issue of heavy metal pollution is a significant concern in the environmental. Hexavalent chromium (Cr(VI)) is hazardous heavy metal when it is discharged and expands within ecosystem. Cr(VI) is a hazardous compound that high susceptibility to oxidation and mutagenic. The tannery industry generates hexavalent chromium in its liquid waste. Managing Cr(VI) liquid waste could use the adsorption technique with activated carbon. In this study the activation of activated carbon using microwave-assisted ZnCl2 chemical activation. The activated carbon used for adsorbing the Cr(VI). The objective of this study was to ascertain the optimum parameters for the adsorption of Cr(VI) utilizing activated carbon. The optimization method is Taguchi, which incorporates three factors: A (pH), B (activated carbon dosage), and C (agitation). The result of optimization is pH 2; 0,4 g activated carbon dosage, and agitation 20 rpm, which the optimal response was 16.7498 mg/L. The analysis using the desirability obtained desirability value of 1. The ANOVA results indicate that the pH significant on the response. The adjusted R-square is 0.9667 and predicted R-square is 0.8668. It can be concluded that the model and actual conditions has slighly discrepancies. Then, the regression equation from the model can be estimate the actual value.
CONCEPT OF CLEANER PRODUCTION APPROACH AND ZERO LIQUID DISCHARGE SYSTEM IN THE TANNERY INDUSTY Atiqa Rahmawati
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 23 No. 1 (2024): Berkala Penelitian Kulit, Sepatu, dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/gbxwh535

Abstract

Tanning industry is one of the industries that produces tannery waste water (TWW) which is dangerous to the environment. About 250 kg leather generating 15,000-50,000 of waste water. This increase environmental concerns regarding TWW. In this review, discussed the concept cleaner production (CP) approach at each process stage in the tannery process and the Zero liquid discharge (ZLD) system used in processing tannery liquid waste. The application of CP in the leather tanning industry is by substituting chemicals with environmentally friendly materials, management water, optimizing tanning conditions, and using technology to recycle and reuse liquid waste. The application of the ZLD system is one of the CP approach for recycle and reuse TWW. The ZLD system used in leather tanning is the Thermal-based ZLD system and Reverse Osmosis. Several countries have implemented the ZLD system, are the United States, India, China, European Union countries and Middle East. The ZLD system is an important TWW strategy to be implemented globally, although operating costs and high energy consumption are limitations in its application. Technological advances and exploration of new approaches to overcome the limitations of ZLD technology may make the approach more feasible and sustainable in the future.
Co-Authors Fadzkurisma Robbika Yuafni