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All Journal Jurnal Kimia (Journal of Chemistry) Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin
Saputra, A.
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Aerospace Engineering Automotive Engineering Chemistry Mechanical Engineering Physics

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DEGRADASI FOTOKATALITIK LIMBAH CAIR BATIK JAMBI MENGGUNAKAN KATALIS HETEROGEN CAO DARI CANGKANG KERANG BAMBU (ENSIS SP.) Saputra, A.; Utami, W.; Ningsih, S.; ., Deliza
Jurnal Kimia (Journal of Chemistry) Vol. 17, No.2, Juli 2023
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JCHEM.2023.v17.i02.p06

Abstract

Limbah cair zat warna Batik Jambi mengandung senyawa organic non-biodegradable yang bersifat karsinogenik. Tujuan penelitian ini untuk mengetahui efektivitas katalis CaO dalam mendegradasi limbah cair zat warna Batik Jambi. Pada penelitian ini, limbah cair zat warna Batik Jambi didegradasi menggunakan metode fotokatalitik penyinaran matahari dan lampu UV 38 watt dengan dan tanpa katalis CaO dari cangkang kerang bambu. Larutan limbah warna dianalisis menggunakan spektrofotometer UV-VIS pada panjang gelombang 200-800 nm dengan massa katalis 0,02 gram. Data memperlihatkan bahwa hasil degradasi limbah cair zat warna Batik Jambi yang paling baik yaitu penambahan katalis CaO dan penyinaran matahari selama 3 jam sebesar 60,34%. Sedangkan penyinaran lampu UV selama 3 jam hanya sebesar 36,12%. Hasil penelitian dapat memberikan beberapa manfaat yaitu sebagai sumber informasi bagi pengrajin batik tentang pengolahan limbah cair Batik secara sederhana. Selain itu, studi ini sebagai data dukung bagi pemerintah tentang pembuatan produk hukum terkait pengolahan limbah cair batik yang belum terperhatikan. Kata kunci: Batik Jambi, CaO, degradasi, fotokatalitik, katalis ABSTRACT The wastewater of Batik Jambi dye contains non-biodegradable organic compounds that are carcinogenic. The purpose of this study was to determine the effectiveness of the CaO catalyst in degrading the Batik Jambi dye wastewater. In this research, Batik Jambi dye wastewater was degraded using the photocatalytic method the solar irradiation and a 38-watt UV lamp with and without a CaO catalyst from bamboo shells. The colored waste solution was analyzed using a UV-VIS spectrophotometer at a wavelength of 200-800 nm with a catalyst mass of 0.02 grams. The data showed that the best result of degradation of Jambi Batik dye wastewater was the addition of a CaO catalyst and solar irradiation for 3 hours of 60.34%. Whereas UV light irradiation for 3 hours was only 36.12%. The result of research could provide several benefits, namely as a source of information for batik craftsmen about the simple processing of liquid waste. In addition, this study served as supporting data for the government regarding the manufacture of law product related to the treatment of batik wastewater which has not been considered Keywords: catalyst, CaO, degradation, photocatalytic
Effect of using phase change material (PCM) magnesium sulfate (MgSO4) solution as heat storage in solar powered thermoelectric cooler box Priyuko, D.; Rifky, R.; Saputra, A.; Fahrezi, A.I.; Sobirin, M.I.
Dinamika Teknik Mesin Vol 15, No 1 (2025): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v15i1.964

Abstract

Utilization of new, renewable energy sources is very important for society as a way to switch from fossil fuels. Solar energy is a type of renewable energy that is very promising for various applications. Traditional cooling systems contribute to the depletion of the ozone layer, requiring alternatives such as using thermoelectric solar energy (TEC) for cooling. In addition, PCM used, such as 25%, 30%, and 35% MgSO₄ solutions, can absorb latent heat during the cooling process, thereby increasing efficiency. This research aims to increase coefficient of performance (CoP) of cooling boxes by integrating solar energy and PCM. Data collection was carried out from 09.30 to 14.40, by measuring light intensity, voltage and current, solar panel temperature, environmental temperature, cooler box wall temperature and TEC temperature. Over three days of data collection, this study determined the minimum temperature and CoP for the cooler. The findings show that the minimum temperature in the cooler without PCM is 16.8℃. Coolers with PCM MgSO₄, 25%, 30%, and 35% the minimum temperatures are 16.7℃, 12.7℃, and 14.7℃. Regarding the average COP, the cooling box without PCM reached 0.0345, while the box with 25%, 30%, and 35% PCM MgSO₄ had a CoP of 0.0354, 0.0469, and 0.0402, respectively. The study concluded that 30% MgSO₄ PCM solution is most suitable for use as PCM, because it affects the minimum temperature and COP of the cooling system. This effectiveness is due to the concentration of MgSO₄ lowering the freezing point of the solution, thereby increasing the cooling performance.
Co-Authors ., Deliza Fahrezi, A.I. Ningsih, S. Priyuko, D. Rifky, R. Sobirin, M.I. Utami, W.