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All Journal Reaktor Rekayasa Mesin Journal of Innovation and Applied Technology Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan INDONESIAN JOURNAL OF ESSENTIAL OIL Jurnal Inovasi Hasil Pengabdian Masyarakat (JIPEMAS) Sarwahita : Jurnal Pengabdian Kepada Masyarakat Prosiding Seminar Nasional Pengabdian Kepada Masyarakat JURNAL REKAYASA KIMIA & LINGKUNGAN
Aji Hendra Sarosa
Jurusan Teknik Kimia Fakultas Teknik Universitas Brawijaya
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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Journal : JURNAL REKAYASA KIMIA

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Batch Adsorption of Tannins from Stevia Leaf Extract using Activated Carbon: An Investigation into Adsorption Isotherms and Adsorption Energy Dewi, Luthfi Kurnia; Purwandaru, Kresna; Maulida, Nurul Istikomah; Sarosa, Aji Hendra
Jurnal Rekayasa Kimia & Lingkungan Vol 19, No 1 (2024): Jurnal Rekayasa Kimia & Lingkungan (June 2024 )
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v18i2.34370

Abstract

Stevia leaf extract (Stevia rebaudiana Bertoni) could have been utilized as an alternative natural sweetener because it possessed a sweetness level 300 times that of sucrose sugar. However, stevia leaf extract still contained a bitter taste attributed to the presence of tannins. The method that can be used to reduce tannin content is batch adsorption using activated carbon. This study aimed to investigate the batch adsorption process for the tannin content of stevia leaf extract using activated carbon with variable adsorption times ranging from 5 to 180 minutes, which included the appropriate adsorption isotherm model and adsorption energy. Stevia leaves were extracted through maceration with 70% ethanol. The results of the stevia leaf extract were adsorbed in batches using activated carbon treated with 1M NaOH. The analysis was carried out by testing the tannin content (mg/g TAE) using a UV-Vis spectrophotometer at a wavelength of 735 nm and calculating the adsorption isotherm and adsorption energy. The results showed that the tannin content before adsorption was 0.910 mg/g TAE, and the lowest tannin content was 0.040 mg/g TAE at 100 minutes. The tannin content decreased between 590 minutes, remained constant, reached equilibrium at 95120 minutes, and increased again at 125180 minutes. The suitable adsorption isotherm model was the Freundlich isotherm with a value of R2 = 0.9998; KF = 25.293 [(mg/g)(L/mg)1/nf], and adsorption energy = -8.03 kJ/mol. The adsorption that occurred was classified as physical adsorption.
Co-Authors Andriana, Rifa Rahma B Budiyanto Bayu, Ardian Indra Benny Imam Santoso Cahyani , Chandrawati Chandrawati Cahyani Chandrawati Cahyani Chandrawati Cahyani Chandrawati Cahyani Christina Wahyu Kartikowati Dienulloh, Naufal Fawwas Ersa Amalia Febriana, Vina Hafizh Tandiyanto P Haifatuz Zahro Hapsari, Safrina Hidayat, Fahrul Huzain Islam, Livya Safira Krisnanda Alif Bagus Wicaksono, Krisnanda Alif Bagus Lukito, Nadiya Bunga Luthfi Kurnia Dewi Luthfi Kurnia Dewi Luthfi Kurnia Dewi, Luthfi Kurnia Maulida, Nurul Istikomah Milenia, Rohmah Miranti , Thiara Jatayuning Muhammad Ihsan Muktafa, Moh. Farid Muttaqin, Moch Fitron Nur Hayati Purwandaru, Kresna Ramadhani, Elsa Erischa Rb. Moh. Miftahol Arifin, Rb. Moh. Miftahol Rifdah, Naufaliyah Rifdah Rifka Sabrina Zaini Risang Parasu Safitri , Mellyantika Alga Sarumpaet, Dicky Gabriel Partogi Sinta Murlistyarini Tjokorde Walmiki Samadhi Veithzal Rivai Zainal Vivi Nurhadianty, Vivi Wa Ode Cakra Nirwana, Wa Ode Cakra