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All Journal Reaktor Jurnal Natur Indonesia ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry Akta Kimia Indonesia Chemistry Indonesian Journal of Chemical Research JURNAL PHOTON J-Dinamika: Jurnal Pengabdian Kepada Masyarakat Journal of Bioprocess Chemical and Environmental Engineering Science Bulletin of Chemical Reaction Engineering & Catalysis
Muhdarina Muhdarina
Jurusan Kimia, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Riau, Kampus Bina Widya, Simpang Baru, Tampan Pekanbaru 28293, Telp, +6276163273
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Nursing Physics

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Complex Concentrated Alloy Catalyst of AlCrFeCoNi for Heterogeneous degradation of Rhodamine B Sembiring, Kiky Corneliasari; Fahrezi, Irgi Ahmad; Muhdarina, Muhdarina; Afandi, Ahmad
Bulletin of Chemical Reaction Engineering & Catalysis 2024: BCREC Volume 19 Issue 1 Year 2024 (April 2024)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20110

Abstract

The Fe-based catalysts have attracted good attention due to their earth abundance and low toxicity with good Fenton-like performance. However, the narrow pH working range and iron-containing sludge produced during the reaction drove the necessary of developing a potential catalyst in the corresponding application. High entropy alloy that now expands to complex concentrated alloy (CCA) represents a new class of material owing to a broader range of functional and structural properties. A new application of CCA as a catalyst for catalytic degradation of azo dyes has already been a scientific research hotspot. AlCrFeCoNi CCA powder has been successfully synthesized by mechanical alloying (MA) method using a vertical planetary ball mill. Based on the characterization, the catalyst possessed a spherical morphology with a particle size range of 3.5-12.6 mm. The catalyst exhibited photo-Fenton performance up to 85.3% which would be a promising Fenton-like catalyst for wastewater treatment. Copyright © 2024 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Tremendous Performance Manganese Oxide Via Coprecipitation Method for Degradation of Palm Oil Mill Effluent Prasetya, Prasetya; Muhdarina, Muhdarina; Saputra, Edy; Awaluddin, Amir
Photon: Jurnal Sain dan Kesehatan Vol. 14 No. 2 (2024): Jurnal Photon
Publisher : LPPM Universitas Muhammadiyah Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jp.v14i2.5082

Abstract

Increased production in industries tends to increase burden and complexity of waste produced. For this reason, it was necessary to develop materials that have good degradation capabilities and into environmental products. In this research, the MnO2 has been synthesized using the strategy of coprecipitation and reducing agents. The as-synthesized MnO2 is then used for the degradation of methylene blue. The results of this study indicate that different strategy of coprecipitation and reducing agents produce different MnO2 and has unique properties as nano-hierarchical microstructure. Using citric acid as a reducing agent results in a hierarchical structure of α-MnO2 and Mn2O3, while oxalic acid produces a hierarchical structure of β-MnO2 and Mn2O3. To optimize the degradation of Palm Oil Mill Waste which contains a high concentration of pollutants, it still needs to be improved. From the parameters pH, chemical oxygen demand, oil & grease, and total suspended solids, the best degradation efficiency of each parameter was achieved at pH 8.8, 16.3%, 43.5% and 56.6%.
Pemberdayaan Masyarakat Melalui Pemanfaatan Limbah Dedak Padi Sebagai Pakan Buatan Ikan Lele Di Desa Kemuning Muda, Kecamatan Bunga Raya, Kabupaten Siak: Community Empowerment through the Utilization of Rice Bran Waste as Artificial Feed for Catfish in Kemuning Muda Village, Bunga Raya District, Siak Regency Nurhayati; Muslim Syaifullah, Mhd; Jasril, Jasril; Fawrin, Heralda; Muhdarina, Muhdarina
J-Dinamika : Jurnal Pengabdian Masyarakat Vol 10 No 1 (2025): April
Publisher : Politeknik Negeri Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Desa Kemuning Muda di Kecamatan Bunga Raya, Kabupaten Siak, Riau, merupakan daerah dengan produksi padi yang melimpah. Dalam proses penggilingan, dedak padi dihasilkan sebagai limbah, tetapi belum dimanfaatkan secara optimal oleh masyarakat. Selain itu, beberapa warga desa melakukan budidaya ikan, termasuk ikan lele, yang terkendala oleh tingginya biaya pakan yang mencapai 60-70% dari biaya produksi. Pemanfaatan dedak padi sebagai pakan lele menawarkan solusi untuk mengurangi biaya produksi sekaligus mengelola limbah pertanian. Pembuatan pakan melibatkan alat sederhana, seperti panci dan kompor, serta bahan-bahan seperti dedak halus, pelet, ikan asin halus, garam, minyak, dan air. Prosesnya dimulai dengan mencampur pelet yang telah dilelehkan dalam air panas dengan dedak halus, minyak, garam, dan ikan asin. Adonan kemudian dibentuk menjadi pelet kecil dan dikeringkan di bawah sinar matahari agar awet. Pakan lele juga dapat dibuat menggunakan metode fermentasi dengan menambahkan pupuk organik cair mikroorganisme (EM4). Bahan kering dicampurkan terlebih dahulu, kemudian larutan EM4 ditambahkan dan diaduk hingga merata. Proses fermentasi dilakukan selama 3-5 hari. Pakan alternatif ini siap digunakan dan menawarkan manfaat bagi pembudidaya lele dalam mengurangi biaya serta meningkatkan keberlanjutan lingkungan.
Synthesis and Characterization of CaO-SiO2 Heterogeneous Catalyst of Blood Cockle Shells and Coconut Fiber Ash for Biodiesel Production from Crude Palm Oil Nurhayati, Nurhayati; Muhdarina, Muhdarina; Linggawati, Amilia; Siregar, Siti Saidah
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.91444

Abstract

The utilization of sustainable and renewable materials, specifically CaO derived from blood clam shells and SiO2 extracted from coconut fiber, as catalysts for biodiesel production not only promotes waste valorization but also enhances catalytic efficiency, providing an eco-friendly and effective solution for biodiesel synthesis. The present study was synthesized and characterized CaO-SiO2 catalysts using the impregnation method with SiO2 content at 3, 5, and 7 wt.%. Characterization included surface area (BET), crystallinity and crystal size (XRD), chemical composition (XRF), functional groups (FTIR), and acidity-basicity (pyridine adsorption and titration). The maximum biodiesel yield of 96.29% was achieved under optimized conditions: 2 wt.% catalyst loading, 90-min reaction time, 60 °C temperature, and a 1:9 oil-to-methanol molar ratio, determined using response surface methodology (RSM). The synthesized biodiesel was evaluated according to ASTM D6751 standards, and its purity and methyl ester composition were analyzed using GC-MS. The results showed that the CaO-SiO2 catalyst achieved a biodiesel purity of 97.44%, higher than that obtained with unmodified CaO. This research successfully modified the CaO-SiO2 heterogeneous catalyst, enhancing its surface area and acidity, which led to an increase in the purity and yield of biodiesel synthesized from crude palm oil with high free fatty acid content.
Sintesis dan Karakterisasi Katalis Nikel Zeolit Alam Ni/NZA Bahri, Syaiful; Saputra, Edy; Herman, Syamsu; Muhdarina, Muhdarina
Journal of Bioprocess, Chemical and Environmental Engineering Science Vol 5 No 1 (2024): Journal of Bioprocess, Chemical, and Environmental Engineering
Publisher : Department of Chemical Engineering, Faculty of Engineering, UNRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jbchees.5.1.36-45

Abstract

Research has been conducted to manufacture Ni/NZA for catalytic cracking of empty palm fruit bunches into liquid fuel. The study aims to investigate the impact of metal impregnation and calcination time variations on catalyst crystallinity and morphology. The catalyst is produced in multiple stages, including NZ activation using acid, followed by metal impregnation at 0%, 1%, 3%, and 5% w/w, and calcination at 500oC for 2, 4, and 6 hours, respectively. It is then oxidized at 400oC for 2 hours and reduced at 400oC for 2 hours. The catalyst's crystallinity, morphology, and metal distribution are determined through X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) analysis. The catalyst with the best crystallinity and metal distribution is found to have 3% metal loading and a calcination time of 2 hours.
Co-Authors - Hafizhah - Midiyarti - Nurhayati - Nurhayati -, Zaiyar A.A. Ketut Agung Cahyawan W Abdul Wahab Mohammad Ade Priyanto, Ade Ahmad Afandi Amilia Linggawati Amir Awaluddin Andanastuti Muchtar Awaluddin A. Edy Saputra Elis Damayanti F., Malik Fahrezi, Irgi Ahmad Fawrin, Heralda Fitri Andiyani Hafizhah, - Jasril Jasril Kiky Corneliasari Sembiring Mhd. Reza Pahlepi Midiyarti, - Muslim Syaifullah, Mhd Nurhayati Nurhayati Nurhayati Nurhayati Nurhayati Nurhayati, Nurhayati Nurwijayanti Prasetya, Prasetya Siregar, Siti Saidah SYAIFUL BAHRI Syamsu Herman T. Ariful Amri Yulianti Yulianti Zetria Pujiana