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All Journal Jurnal Natur Indonesia Jurnal Teknik Kimia USU Komunikasi Fisika Indonesia Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Jurnal Pengabdian UntukMu NegeRI ALCHEMY Jurnal Penelitian Kimia IJEBA (International Journal of Economic, Business & Applications) JURNAL PHOTON Acta Biochimica Indonesiana Jurnal Inovasi Pendidikan dan Sains Journal of Applied Materials and Technology Jurnal UNITEK KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia Dinamika Lingkungan Indonesia Jurnal Teknik Kimia USU International Journal of Renewable Energy Development al Kimiya : Jurnal Ilmu Kimia dan Terapan
Amir Awaluddin
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Karakterisasi Biochar dari Tandan Kosong Kelapa Sawit Febrina, Wetri; Awaluddin, Amir; Saryono, Saryono; Helwani, Zuchra
JURNAL UNITEK Vol. 17 No. 2 (2024): Juli - Desember
Publisher : Sekolah Tinggi Teknologi Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52072/unitek.v17i2.1150

Abstract

Pada awalnya teknologi biochar berkembang pesat karena manfaatnya dalam meningkatkan kesuburan tanah, memperbaiki struktur tanah, meningkatkan hasil panen dan memperbaiki kondisi tanaman.. Penggunaan biochar saat ini meluas diluar bidang pertanian, diantaranya sebagai bahan bakar alternatif, dan sebagai adsorben dalam pengolahan air limbah. Pemanfaatan limbah pertanian dan perkebunan menjadikan pemanfaatan biochar bermanfaat dalam usaha untuk memperbaiki kondisi lingkungan.  Penelitian ini bertujuan untuk mengetahui dan menganalisis karaktersitik fisikokimia biochar dari tandan kosong kelapa sawit, dan potensinya sebagai adsorben pengolahan limbah cair.  Biochar diaktifkan menggunakan kalium hidroksida (KOH) pada berbagai konsentrasi. EFB yang diaktivasi dengan KOH 3M menunjukkan kapasitas adsorpsi tertinggi dibandingkan dengan yang diaktivasi dengan KOH 2M dan 1M. Hasil ini didukung oleh data tentang gugus fungsi dan struktur pori, yang diamati menggunakan spektroskopi Fourier Transform Infrared (FTIR) dan metode Brunauer-Emmett-Teller (BET).
EFFECT OF ACIDITY, BASICITY, HETEROGENEOUS CaO/SILICA GEL CATALYST FROM BIOMASS WASTE ON BIODIESEL YIELD FROM CRUDE PALM OIL Mulyani, Yenni; Nurhayati, Nurhayati; Awaluddin, Amir
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol 11, No 2 (2024): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v11i2.39301

Abstract

The global energy sector has been dominated by non-renewable fossil fuels, prompting many countries to invest in renewable energy sources such as biodiesel. Crude palm oil (CPO), as a biodiesel feedstock, has a high FFA content, which can cause saponification reactions. This can reduce the quality of biodiesel if only CaO catalyst is used. Therefore, acid catalysts such as silica gel are needed to overcome this problem. Silica gel can also improve the stability, reactivity, and effectiveness of CaO catalyst in biodiesel production. This study aims to synthesize and characterize the heterogeneous CaO/silica gel catalyst obtained from biomass waste, and evaluate its activity in the conversion of CPO into biodiesel. The CaO/silica gel hybrid catalyst was prepared by wet impregnation method with varying percentage of silica gel (5%, 10%, and 15%), which was synthesized from coconut husk using sol-gel method, and mixed with CaO from calcination of blood clam shells at 900°C for 5 hours. The basicity characterized using the acid-base titration method, while the acidity was analyzed using pyridine adsorption method with FTIR, and the surface area was analyzed by BET method. The results showed that the synthesis of CaO/silica gel was successful, with confirmation of FTIR data at specific wavelengths. The addition of silica gel increased the acidity and surface area and decreased the basicity of CaO catalyst, with 10% CaO/silica gel showing optimal acidity and surface area. Testing the catalyst activity in the reaction of biodiesel formation from CPO produced the highest biodiesel yield of 96.71% using CaO/silica gel 10%. The conclusion of this study is that biomass waste-based heterogeneous catalysts have high potential for biodiesel production, which is influenced by their acidity and surface basicity, and offer a low-cost and environmentally friendly solution.
Response surface optimization of biodiesel synthesis from crude palm oil (CPO) using CaO/silica gel heterogeneous catalyst based on blood cockle shell and coconut fiber Nurhayati, Nurhayati; Awaluddin, Amir; Mulyani, Yenni
International Journal of Renewable Energy Development Vol 14, No 2 (2025): March 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.60855

Abstract

This study successfully synthesized a hybrid catalyst CaO-silica gel from environmentally friendly raw materials, CaO derived from blood clam shells and silica gel obtained from coconut fiber waste ash. The catalytic activity was evaluated in the synthesis of biodiesel from crude palm oil (CPO). The CaO-Silica gel catalyst was synthesized by the wet impregnation method with variations of silica gel, namely 5, 10 and 15 wt%. The catalyst was characterized using XRD, XRF, SEM, and BET analysis. The results showed a decrease in CaO content with increasing silica gel concentration, while XRD analysis confirmed the presence of lime, portlandite, Ca₂SiO₄, and silica oxide minerals. The addition of silica gel reduced the crystal size and crystallinity and increased the surface area of the catalyst. Optimization of biodiesel production was carried out using the Response Surface Methodology (RSM), considering variables such as temperature, reaction time, molar ratio of oil to methanol, and catalyst loading. The highest biodiesel yield was obtained using 5% CaO/silica gel catalyst at a temperature of 65°C, a reaction time of 60 minutes, an oil-methanol molar ratio of 1:9, and a catalyst addition of 2%, resulting in a biodiesel yield of 99.52%. In addition, the methyl ester content reached 99.21% using a 10% CaO/silica gel catalyst. The resulting biodiesel met ASTM and EN standards, except for the acid value.
EFFECT OF ACIDITY, BASICITY, HETEROGENEOUS CaO/SILICA GEL CATALYST FROM BIOMASS WASTE ON BIODIESEL YIELD FROM CRUDE PALM OIL Mulyani, Yenni; Nurhayati, Nurhayati; Awaluddin, Amir
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol. 11 No. 2 (2024): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v11i2.39301

Abstract

The global energy sector has been dominated by non-renewable fossil fuels, prompting many countries to invest in renewable energy sources such as biodiesel. Crude palm oil (CPO), as a biodiesel feedstock, has a high FFA content, which can cause saponification reactions. This can reduce the quality of biodiesel if only CaO catalyst is used. Therefore, acid catalysts such as silica gel are needed to overcome this problem. Silica gel can also improve the stability, reactivity, and effectiveness of CaO catalyst in biodiesel production. This study aims to synthesize and characterize the heterogeneous CaO/silica gel catalyst obtained from biomass waste, and evaluate its activity in the conversion of CPO into biodiesel. The CaO/silica gel hybrid catalyst was prepared by wet impregnation method with varying percentage of silica gel (5%, 10%, and 15%), which was synthesized from coconut husk using sol-gel method, and mixed with CaO from calcination of blood clam shells at 900°C for 5 hours. The basicity characterized using the acid-base titration method, while the acidity was analyzed using pyridine adsorption method with FTIR, and the surface area was analyzed by BET method. The results showed that the synthesis of CaO/silica gel was successful, with confirmation of FTIR data at specific wavelengths. The addition of silica gel increased the acidity and surface area and decreased the basicity of CaO catalyst, with 10% CaO/silica gel showing optimal acidity and surface area. Testing the catalyst activity in the reaction of biodiesel formation from CPO produced the highest biodiesel yield of 96.71% using CaO/silica gel 10%. The conclusion of this study is that biomass waste-based heterogeneous catalysts have high potential for biodiesel production, which is influenced by their acidity and surface basicity, and offer a low-cost and environmentally friendly solution.
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%.
Redox-driven formation of hausmannite-type manganese oxide and its catalytic performance Awaluddin, Amir; Ilahi, Aulia Nur; Fachran Putra Deraf, Ivano; Siregar, Siti Saidah; Saputra, Edy
Journal of Applied Materials and Technology Vol. 6 No. 2 (2025): March 2025
Publisher : Faculty of Engineering Universitas Riau and Applied Materials and Technology Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/Jamt.6.2.64-70

Abstract

Various manganese oxides have been reported to be an active catalyst for degradation of a dye. The synthetic manganese oxides can be conducted by several methods with the products having the different physicochemical properties and structures. This research focused on the synthesis of  hausmanite-type manganese oxide (Mn2O3)  by hydrothermal method with different mole  ratio  of  KMnO4/glucose (3:1 and 2:3) and its application as a Fenton catalyst   for the degradation of methylene blue (MB). The as-synthesized manganese oxides were then characterized  by XRD for their structure and crystallinity and FTIR and Raman spectroscopy for the lattice vibrations. The average oxide state (AOS) of manganese in the as-synthesized manganese oxide was determined by the back titration method. The XRD results indicated  the presence of mixed phases with hausmanite  phase as major component and  cryptomelane and birnessite phases as minor ones. FTIR spectroscopy results showed the presence of O-Mn vibrations at wavelengths of 468 cm-1, 487cm-1, and 726 cm-1. In addition, Raman spectroscopy results clearly showed the  specific vibrations of hausmanite at 655 cm-1 and 653 cm-1, respectively. The low value of  Mn AOS was obtained when the oxide was prepared in low ratio KMnO4/glucose and short reaction time. The as-synthesized hausmanite was  tested  as the Fenton catalyt for the degradation of MB.  The as-synthesized hausmanite synthesized with different mole rasio and reaction time showed similar catalytic activity for the degradation of MB with the highest MB degradation of 90.76%
Pengolahan Sampah Organik Rumah Tangga Menjadi Sabun Cair Eco-Enzym: Pemberdayaan dan Pelatihan di Desa Bungaraya Sophia, Halida; Mukhlis; Awaluddin, Amir; Emrizal M. Tamboesai; Silvera Devi; Siregar, Siti Saidah; Tengku Abu Hanifah; Muras , Yuharmen; Itnawita
Jurnal Pengabdian UntukMu NegeRI Vol. 9 No. 2 (2025): Pengabdian Untuk Mu negeRI
Publisher : LPPM UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jpumri.v9i2.9638

Abstract

Pengelolaan sampah organik rumah tangga merupakan tantangan lingkungan yang signifikan di Desa Bungaraya, yang berdampak negatif terhadap kebersihan lingkungan dan kesehatan masyarakat. Program pengabdian ini bertujuan untuk memberdayakan masyarakat dalam mengurangi limbah organik melalui pelatihan pembuatan sabun cair eco-enzyme. Metode yang digunakan meliputi penyuluhan, demonstrasi, dan praktik langsung, dengan partisipasi aktif sebanyak 30 warga. Hasil kegiatan menunjukkan peningkatan pengetahuan dan keterampilan peserta terkait pengelolaan sampah dan produksi eco-enzyme. Selain berkontribusi dalam mengurangi sampah organik, produk sabun cair yang dihasilkan bernilai ekonomi dan dapat dimanfaatkan secara pribadi maupun dijual untuk menambah pendapatan rumah tangga serta memberikan kontribusi terhadap keberlanjutan lingkungan sekaligus menguatkan potensi ekonomi berbasis komunitas.
Synthesis of Manganese Oxide – Magnetite (Fe3O4) for The Degradation of Methylene Blue Ramadhanti, Aulia Rizki; Awaluddin, Amir; Nurhayati, Nurhayati; Siregar, Sri Hilma
Photon: Jurnal Sain dan Kesehatan Vol. 15 No. 2 (2025): Journal Photon
Publisher : LPPM Universitas Muhammadiyah Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jp.v15i2.9019

Abstract

Methylene blue is a dye that is challenging to break down in aquatic environments. A promising approach to degrade methylene blue involves using metal oxide-based materials. Magnetite (Fe₃O₄) is beneficial for easy separation after catalytic reactions, while manganese oxide is effective in oxidation processes. Combining manganese oxide and magnetite can create materials with synergistic properties that improve the degradation of methylene blue through photocatalytic mechanisms or modified Fenton reactions. The development of manganese-magnetite oxide (Fe₃O₄) composites offers a potential solution for efficient, eco-friendly, and reusable catalysts. This study aims to investigate the synthesis of manganese-magnetite oxide and its performance in methylene blue degradation as an innovative solution to water pollution. The MnOx-Fe₃O₄ composite was successfully synthesized using the hydrothermal method at 110°C for 6 hours. XRD results show that increasing Fe₃O₄ concentration enhances the Fe₃O₄ peak, while the Hausmanite peak disappears, overlapping with the Fe₃O₄ peak, as supported by SEM results. The MnOx-Fe₃O₄ composite (1:10 ratio) was most effective in degrading methylene blue, achieving 92% degradation of 100 mL of 20 ppm methylene blue with a catalyst concentration of 0.1 g and 5 mL of H₂O₂ using the Fenton method.
Pengaruh Penambahan KOH Terhadap Kulit Kerang (Anadara granosa) Sebagai Katalis Dalam Pembuatan Biodiesel Afandi, Trisno; Nurhayati; Awaluddin, Amir; Nainggolan, Fernando; Rahmat, Nahzim
KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia Vol 8 No 2 (2025): Jurnal Katalis Vo.8 No.2 Tahun 2025
Publisher : Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/katalis.v8i2.13377

Abstract

The utilization of waste as a source of catalytic material in biodiesel production continues to be developed, including waste from cockle shells. In this study, the addition of KOH to the suspension of calcined cockle shells was carried out to increase the catalyst activity in biodiesel production through the transesterification reaction. The catalyst was prepared through the following stages: 1) calcination of cockle shells at 900°C for 10 hours, 2) addition of KOH to the suspension of calcined cockle shells with varying K percentages of 1%; 3%; and 5%, then the mixture was calcined at 600°C. The formed catalyst contains the minerals portlandite (Ca(OH)2) and calcite (CaCO3) based on the X-Ray Diffraction test. The addition of KOH to the suspension of calcined cockle shells was successfully carried out through the K content test using Atomic Absorption Spectroscopy. The K concentration measurement data increased along with the increase in the amount of K added, respectively at 0% K of 2381 ppm, 1% K of 2425 ppm, 3% K of 3183 ppm, and 5% K of 3800 ppm. The basicity of the catalyst was measured by titration using benzoic acid with the result of increasing basicity after the addition of KOH, each basicity of the catalyst 0% K was 1.700 mmol benzoic acid/g, 1% K was 1.700 mmol benzoic acid/g, 3% K was 1.865 mmol benzoic acid/g, and 5% K was 1.965 mmol benzoic acid/g. The catalyst activity test data in biodiesel production showed an increase in the percentage of biodiesel yield, respectively at 0% K of 56.17%, 1% K of 57.72%, 3% K of 76.33%, and 5% K of 76.85%. The catalyst activity also increased based on the measurement data of methyl ester content in biodiesel using Gas Chromatography, respectively at 0% K of 96.42%, 1% K of 97.5%, 3% K of 98.36%, and 5% K of 97.79%. The results show that the catalyst has the potential to be developed and applied in the biodiesel industry as an environmentally friendly catalytic material.
OPTIMASI PERTUMBUHAN ISOLAT FUNGI INDIGEN Penicillium sp. LBKURCC153 PENDEGRADASI NAFTALENA MENGGUNAKAN GLUKOSA SEBAGAI KOSUBSTRAT PADA MINIMAL MEDIUM Aisyah Fitrida; Riryn Novianty; Saryono Saryono; Amir Awaluddin; Nova Wahyu Pratiwi
Jurnal Inovasi Pendidikan dan Sains Vol 1 No 1 (2020): April
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Nahdlatul Wathan Mataram

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

Abstract

Naphthalene is one of the pollutants that is difficult to degrade because it belongs to the PAH group and it was carcinogenic. The purpose of this study was to test the effectiveness of an indigenous fungi isolate from Riau Province to degrade naphthalene toxic compounds with glucose as growth cosubstrate. Naphthalene degradation by fungi isolates was influenced by several parameters, including biomass, pH and percentage degradation measured at 0, 4, 8, 12 and 16 days of incubation. Based on biomass parameters, the isolate of Penicillium sp. LBKURCC153 experienced an exponential phase until the 16th day. In the exponential phase, the maximum number of cells increases which shows a positive response to the use of glucose and naphthalene as the carbon and energy source. Isolate decreased their pH from 7 to 3,8, that mean proves the growth activity produce organic acid metabolites of degrade naphthalene. Isolate were also able to degrade naphthalene respectively 27,5% by Penicillium sp. LBKURCC153 in medium with glucose at optimation time until 4 th day incubation. In conclusion, glucose cosubstrate can increase naphthalene degradation percentage by Penicillium sp. LBKURCC153.
Co-Authors ', Itnawita ', Padil ', Wahyuni - Hafizhah -, Presetya - . Zulfan Adrianto Ahmad Adrianto Ahmad Afandi, Trisno Afra Juwita Aisyah Fitrida Akmal Muchtar Aman Aman Aman Aman Amilia Linggawati Amiruddin, Erwin Amun Amri Anna Ridha Utami Arif Kurnia Auzar, Auzar Dian Anggraini Elis Damayanti Emrizal M. Tamboesai Emrizal Mahidin Tamboesai Endang Maya Sari Erwin Amiruddin Fachran Putra Deraf, Ivano Fachry Abda El Rahman Febrina, Wetri Hadilala, Teguh P Hafizhah, - Halida Sophia Hartini Azhar Hasan Yilmas Ilahi, Aulia Nur Irawati Suherman Itnawita Itnawita ' M. Zulfikri Mokhamad Subkhan Monita Olivia Muhammad Rizki Muhdarina Muhdarina Muhdarina Mukhlis Mulyani, Yenni Muras , Yuharmen Nainggolan, Fernando Nova Wahyu Pratiwi Nova Wahyu Pratiwi Novianty, Riryn Nurhayati Nurhayati Nurhayati Nurwijayanti Pepi Helza Yanti Pepi Helza Yanti Prasetya, Prasetya Prawiranegara, Barata Aditya Presetya - - Rahmat, Nahzim Rahmondia N. Setiadi Ramadhanti, Aulia Rizki Riska Anggraini Riska Anggraini, Riska Rita Marlina Rosa Murwindra, Rosa Rudi Rahmadi Saryono Saryono Saryono Saryono ' Saryono Saryono Saryono, M.Or. S.Pd. Jas. Setia Utama, Panca Silvera Devi Siregar, Siti Saidah Siregar, Siti Saidah Siregar, Sri Hilma Slamet Wahyuningsih Sri Nelvia Subkhan, Mokhamad Suci Apriani Suci Apriani Tengku Abu Hanifah Wahyu Pratiwi , Nova Wisnu Aditya Yilmas, Hasan Zuchra Helwani, Zuchra Zulfan Saam Auzar