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All Journal Chemistry Indonesian Journal of Chemical Research Science Education and Application Journal Jurnal Daur Lingkungan Jurnal Teknik Industri Terintegrasi (JUTIN) Jurnal Abdimas Indonesia : Jurnal Abdimas Indonesia Jurnal Energi Baru dan Terbarukan Chemical Engineering Journal Storage (CEJS) Jurnal Teknologi Kimia Unimal Jurnal Abdimas Indonesia Jurnal Malikussaleh Mengabdi Journal Serambi Engineering (JSE)
Ekawati, Linda
Politeknik Negeri Sriwijaya, Palembang, Indonesia
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mechanical Engineering Public Health Social Sciences Other

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Pembuatan Bioetanol Dari Limbah Kulit Durian Menggunakan Proses Fermentasi Reza, Jeanne Salwa Saphira; Yerizam, Muhammad; Ekawati, Linda
Jurnal Daur Lingkungan Vol 8, No 1 (2025): February
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/daurling.v8i1.307

Abstract

The utilization of durian peels, which are considered agricultural waste, remains minimal. One alternative to reduce the amount of durian peel waste is to use it as a basic material for producing bioethanol. Durian peels contain a significant amount of cellulose, making them highly potential as a basic material for bioethanol production. One of the key processes in producing bioethanol is fermentation, which is carried out with the help of microorganisms, specifically those from baker’s yeast or Saccharomyces cerevisiae. This experiment was conducted to determine the effect of fermentation duration and yeast mass on the resulting bioethanol content. The independent variables in this study are fermentation time and the mass of yeast used. The fermentation times used are 24, 48, 72, 96, and 120 hours, with yeast mass concentrations of 2%, 4%, and 6% mass/volume. After fermentation, the process continues to the purification or distillation stage to obtain the final bioethanol product. The obtained bioethanol will then be measured for its refractive index and analyzed using Gas Chromatography to determine its bioethanol content (%). The highest bioethanol content observed in this experiment was 29.33%, achieved with a fermentation time of 72 hours and a yeast mass of 6%. The quantitative analysis using GC showed the highest bioethanol content of 29.70%. These results indicate that durian peel waste has significant potential as a basic material for bioethanol production.
Pengaruh Variasi Jumlah Katalis Ni/Al2O3 dan Konsentrasi KOH Terhadap Efisiensi Metanasi CO2 Gilang Ramahdan; Junaidi, Robert; Ekawati, Linda
Chemical Engineering Journal Storage (CEJS) Vol. 6 No. 01 (2026): Chemical Engineering Journal Storage (CEJS)-Febuari 2026
Publisher : LPPM Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/cejs.v6i01.24201

Abstract

Pencemaran karbon dioksida (CO2) adalah salah satu permasalahan lingkungan global yang saat ini menjadi isu yang sangat penting. Menurut data dari Badan Pusat Statistik (BPS) Indonesia, emisi karbon dioksida di Indonesia meningkat sebesar 4,54% dari tahun 2015 hingga 2019. Pada tahun 2015, emisi karbon dioksida di Indonesia mencapai sekitar 505,3 juta ton CO2. Namun pada tahun 2019, emisi karbon dioksida meningkat menjadi sekitar 527,3 juta ton CO2 . dari batu bara naik 1,6% sedangkan emisi bahan bakar minyak meningkat 2,5%. Salah satu cara untuk mengurangi karbon dioksida di atmosfer adalah dengan mengubah karbon dioksida dan menggunakannya dalam bahan kimia, misalnya dengan menghidrogenasi CO2 menjadi metana. Tujuan dari penelitian ini adalah menghasilkan gas metana dari karbon dioksida menggunakan variasi jumlah katalis Ni/Al2O3 dan variasi konsentrasi KOH. Dalam penelitian ini, digunakan CO2 sebagai bahan baku dengan katalis Ni/Al2O3 dan logam Zn. Jumlah Katalis Ni/Al2O3 diatur dengan variasi (51,52, 53 dan 54 gram), konsentrasi KOH diatur dengan variasi (3,5M; 4M; dan 4,5M) dan waktu operasi 20 menit. Untuk analisa gas metana (CH4) yang dihasilkan akan dianalisa menggunakan Multi Gas Detector Analyzer. Berdasarkan hasil penelitian ini gas metana hasil konversi paling tinggi diangka 47,58% dengan variasi pada jumlah katalis 54 gram dan konsentrasi KOH 4,5M
Fixed-Bed Column Performance of NaOH-Activated Hybrid Adsorbent Derived from Jengkol Peels and Coconut Shells for Cu(II) Removal Dwi Indah Lestari; Linda Ekawati; Syariful Maliki; Zeolita Prabu Putri; Isma Uly Maranggi
Science Education and Application Journal Vol. 8 No. 1 (2026): Science Education and Application Journal
Publisher : Program Studi Pendidikan IPA, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/seaj.v8i1.1324

Abstract

This study aims to evaluate the dynamic performance of NaOH-activated hybrid adsorbent derived from jengkol peels and coconut shell for Cu(II) removal in a fixed-bed column. The performance indicators include the adsorption capacity, removal efficiency, and structural characterization. The hybrid adsorbent was characterized using Fourier Transform Infrared Spectroscopy (FTIR) to identify functional groups that play a role in the adsorption process and Scanning Electron Microscope (SEM). The FTIR characterization results showed that the hybrid adsorbent was rich in functional groups such as hydroxyl (-OH), aromatic stretching (C=C), and aliphatic (C-H) groups. Meanwhile, the SEM characterization showed that the surface structure of the adsorbent tended to be honeycomb-shaped with varying pores. The adsorption test was performed in a downflow fixed-bed column under continuous operation with a total operation time of 30 minutes. Under the tested conditions (influent concentration of 100 mg/L and flow rate of 25 mL/min), 95% removal was achieved at 30 min in the fixed-bed column system, corresponding to a dynamic adsorption capacity of 11.3 mg/g. Kinetic modelling indicated that the Thomas and Yoon – Nelson models provided a better fit than the Adam-Bohart model, indicating that adsorption was primarily controlled by surface kinetics rather than intraparticle diffusion. This biomass waste-based hybrid adsorbent has the potential to be an environmentally friendly alternative for treating liquid waste containing Cu ions.
Co-Authors Afifah Adhawia Alsarah, Danil Son Anerasari Meidinariasty Assyffa, Syahna Nur ayu Kalista Didiek Hari Nugroho Dwi Indah Lestari Gilang Ramahdan Isma Uly Maranggi Khoirotun Nafillah M. Aris Ganiardi M. Faris Zhafran Masayu Intan Nur’Aina Muhammad Deddy Syafrullah Muhammad Yerizam Muhammad Zulkarnain Pradipta, Primadya Purwanto Purwanto Putri, Aninda Arik Tanza Reza, Jeanne Salwa Saphira Robert Junaidi Safril Kartika Wardana Setiawan, Farah Kania Sulastriani Sulastriani, Sulastriani Syariful Maliki Wardana, Safril Kartika Yuliansyah Yuliansyah Zeolita Prabu Putri