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All Journal Jurnal EnviScience (Environment Science) ASEAN Journal of Chemical Engineering
Wardani, Erina Endah Kusuma
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Public Health

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Mass Transfer of Natural Dye Extraction and the Degradation Rate Mindaryani, Aswati; Rahayuningsih, Edia; Zahra, Aulia; Wardani, Erina Endah Kusuma
ASEAN Journal of Chemical Engineering Vol 23, No 3 (2023)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.90844

Abstract

This research studied the effect of temperature on the mass transfer rate and degradation rate of natural dye extraction. As the representative, two natural dyes extracted from Senduduk and Susupan Gunung plants were employed. Senduduk and Susupan Gunung are weed plants that are often found in peatlands. Susupan Gunung is easily found in South Kalimantan, and local people use it as a natural dye for handicraft products. Senduduk is often found in the South Sumatra area also used as a natural dye for traditional fabrics. Senduduk and Susupan Gunung were extracted in a three-neck flask using water as a solvent at temperatures of 50°, 70°, and 90°C. Samples of the extract solution were taken at certain times until the tannin concentration was constant. The tannin concentration in the solution was analyzed using volumetric methods. Experimental data consists of tannin concentrations in solution at various times. The mass transfer coefficient, equilibrium constant, and tannin degradation rate constant were determined by minimizing the sum square of errors between experimental data and the model. Senduduk contains more tannin (0.0094 g/cm3 solution) than Susupan Gunung (0.0079 g/cm3 solution), and Senduduk has a higher mass transfer coefficient than Susupan Gunung. The higher the temperature, the greater the rate of tannin degradation. During the extraction process, extract of Senduduk and Susupan Gunung leaves are stable at 50°C, which tends to degrade faster at higher temperatures. 
Optimasi Waktu Maserasi pada Ekstraksi Flavonoid dari Limbah Kulit Jeruk Nipis (Citrus aurantiifolia) Wardani, Erina Endah Kusuma; Sutama, Daning Kinanti; Suryanti, Fenni; Khariro, Kalimatul
Jurnal EnviScience (Environment Science) Vol. 10 No. 1 (2026): Environmental Health: Multidisciplinary Approaches to Improving Air, Water, an
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/jev.v10i1.955

Abstract

Limbah kulit jeruk berpotensi mencemari lingkungan apabila tidak dikelola dengan baik, namun mengandung senyawa bioaktif berupa flavonoid yang bernilai guna. Penelitian ini bertujuan untuk menentukan kadar flavonoid total ekstrak kulit jeruk nipis (Citrus aurantifolia) serta mengkaji pengaruh waktu maserasi terhadap hasil ekstraksi. Proses ekstraksi dilakukan dengan metode maserasi menggunakan pelarut metetanol pada variasi waktu 12, 24, 36, 48, 60, dan 72 jam. Penetapan kadar flavonoid total dilakukan dengan metode kalorimetri aluminium klorida (AlCl₃) menggunakan kuersetin sebagai standar, kemudian dianalisis menggunakan spektrofotometer UV–Vis pada panjang gelombang maksimum 410 nm. Hasil menunjukkan bahwa kadar flavonoid meningkat hingga mencapai nilai optimum pada 24 jam sebesar 5,13 mg QE/g, kemudian menurun pada waktu maserasi yang lebih lama. Penurunan tersebut menunjukkan adanya pengaruh mekanisme difusi pada tahap awal ekstraksi dan degradasi senyawa akibat waktu kontak yang terlalu panjang. Dengan demikian, waktu optimum untuk ekstraksi flavonoid total dari kulit jeruk nipis adalah 24 jam. Kata Kunci : Limbah kulit jeruk; flavonoid total; waktu maserasi
Co-Authors Aswati Mindaryani Edia Rahayuningsih Khariro, Kalimatul Suryanti, Fenni Sutama, Daning Kinanti Zahra, Aulia