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All Journal Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Yuafni
Department of Leather Product Technology, Politeknik ATK Yogyakarta, 55188, Yogyakarta, Indonesia

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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.
EXPLORATION OF LANTUNG WOOD LEATHER WITH DESIGN THINKING METHOD FOR PRODUCT DEVELOPMENT OF LANTUNG BENGKULU MSMEs Mochammad Charis Hidayahtullah; Eka Legya; Yuafni; Sugiyanto; Naimah Putri; Fauzi Ashari; Latifah Listyalina; Wahyu Ratnaningsih
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 21 No. 2 (2022): Berkala Penelitian Kulit, Sepatu dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/1fp7hf54

Abstract

Indonesia is one of the countries that have contributed to the apparel, leather, and textile industry in the international market. Not only that, but Indonesian MSME handicrafts are also one of the commodities that can increase the country's foreign exchange, one of which is the lantung bark craft from Bengkulu. However, the creative industry is constantly facing competition with the entry of cheap products from China that get easy access with the increasing e-commerce technology. Providing value for the Lantung Bengkulu MSME products to compete locally and globally, one of the steps is to apply the Design Thinking Method and take the distinctive character of the stylized Serawai Tribe Weaving in the exploration process. The results of this study have obtained data that 47 Bengkulu women consumers as much as 89.4% like the results of the re-design and exploration of lantung shoes that have been designed. In determining the selling price of MSME Lantung Bengkulu should also set a price range of Rp. 110.000 to Rp. 500.000 because it corresponds to the purchasing power of female consumers in Bengkulu. The results of this study directly contribute to providing product value to the typical Bengkulu Lantung MSMEs. The Design Thinking method has been successfully increasing the value of the Lantung Bengkulu MSME products, this method can be applied to similar research to develop local MSMEs in Indonesia.
Co-Authors Atiqa Rahmawati Eka Legya Fadzkurisma Robbika Fauzi Ashari Latifah Listyalina Mochammad Charis Hidayahtullah Naimah Putri Sugiyanto Wahyu Ratnaningsih