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All Journal Indonesian Physical Review Jurnal Nasional Pengelolaan Energi MigasZoom Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Journal of Dedication in Community (JoDiC)
Ramadhan, Yuansyah Dhaniar
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Mathematics Mechanical Engineering Physics Social Sciences Other

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STUDI EKSPERIMENTAL VARIASI NAOH DALAM PROSES DESULFURISASI PERTASOL DAN KAITANNYA DENGAN PERSPEKTIF FISIKA ATMOSFER Ramadhan, Yuansyah Dhaniar; Realita, Arie; Nurdin, Nurdin
Jurnal Nasional Pengelolaan Energi MigasZoom Vol. 7 No. 1 (2025): Jurnal Nasional Pengelolaan Energi MigasZoom
Publisher : Pusat Pengembangan Sumber Daya Manusia Minyak dan Gas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37525/mz/2025-1/1050

Abstract

Kandungan sulfur dalam bahan bakar fosil seperti Pertasol, merupakan penyumbang utama emisi sulfur dioksida (SO₂) yang berdampak buruk kesehatan manusia, kualitas udara dan keseimbangan atmosfer. Penelitian ini bertujuan untuk mengevaluasi efektivitas desulfurisasi Pertasol jenis CA dan CB menggunakan larutan natrium hidroksida (NaOH) dengan variasi konsentrasi 5–30%, serta mengkaji implikasinya terhadap emisi SO₂ dan nilai Radiative Forcing (RF). Proses desulfurisasi dilakukan secara eksperimental dengan volume bahan bakar tetap 50 mL pada setiap perlakuan, dan dianalisi kandungan sulfur sebelum dan sesudah perlakuan menggunakan Oil Sulfur Analyzer. Hasil menunjukkan bahwa peningkatan konsentrasi NaOH mampu menurunkan kandungan sulfur secara signifikan, dengan efisiensi optimum pada konsentrasi 20–25%. Estimasi emisi SO₂ menurun dari 0,02101 g menjadi 0,01766 g untuk Pertasol CA dan dari 0,04260 g menjadi 0,02075 g untuk Pertasol CB. Penurunan emisi ini diikuti dengan penurunan nilai RF, dari 0,0918 W/m² menjadi 0,0772 W/m² (CA) dan dari 0,1864 W/m² menjadi 0,0909 W/m² (CB), menunjukkan reduksi kontribusi sulfur terhadap ketidakseimbangan energi atmosfer. Proses kimia yang terjadi melibatkan konversi senyawa organosulfur menjadi bentuk garam larut seperti Na₂SO₃ dan Na₂SO₄. Dengan demikian, penggunaan NaOH pada proses desulfurisasi terbukti tidak hanya efektif menurunkan kadar sulfur, tetapi juga berkontribusi dalam upaya mitigasi dampak lingkungan dan perubahan iklim akibat bahan bakar fosil.
Inovasi Komposter Dua Fungsi Sebagai Solusi Pengelolaan Limbah Rumah Tangga di Kabupaten Trenggalek: Realita, Arie; Fahmi, Muhammad Nurul; Madlazim; Putri, Nugrahani Primary; Kusumawati, Diah Hari; Ramadhan, Yuansyah Dhaniar; Situmeang, Adedio Daniel; Huda, Naufal Mumtas
Journal of Dedication in Community Vol. 3 No. 2 (2025)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences (FMIPA) Universitas Negeri Surabaya (UNESA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jodic.v3n2.p1-11

Abstract

Pengelolaan limbah organik rumah tangga masih menjadi tantangan di berbagai wilayah perdesaan Indonesia, termasuk Kabupaten Trenggalek. Rendahnya kesadaran masyarakat dan terbatasnya akses terhadap teknologi tepat guna menyebabkan limbah dapur rumah tangga belum dimanfaatkan secara optimal. Program Pengabdian kepada Masyarakat ini bertujuan untuk meningkatkan literasi lingkungan dan keterampilan pengelolaan limbah melalui inovasi komposter dua fungsi, yang mampu menghasilkan kompos padat dan pupuk cair secara simultan. Kegiatan dilaksanakan di Desa Sukorejo, Kecamatan Gandusari, dengan melibatkan 20 ibu rumah tangga dari kelompok PKK. Metode pelaksanaan menggunakan pendekatan edukatif-partisipatif berbasis model DEK SUSI dan Participatory Technology Development (PTD). Evaluasi dilakukan melalui pre–post test, angket, observasi, dan wawancara. Hasil menunjukkan peningkatan pemahaman peserta dari skor rata-rata 2,9 menjadi 3,9, dengan 95% peserta memahami fungsi kompos, 75% menyatakan alat mudah digunakan, dan 85% bersedia bergabung dalam skema penggunaan kolektif. Hambatan utama adalah keterbatasan alat, ruang, dan akses bioaktivator. Program ini terbukti efektif dalam membangun kesadaran dan keterampilan masyarakat terhadap pengelolaan limbah berbasis rumah tangga. Inovasi sederhana ini memiliki potensi untuk direplikasi secara luas guna mendorong transformasi perilaku lingkungan dan ekonomi sirkular lokal.
HVSR-Based Microzonation of Natural Frequency, Amplification, Vulnerability Index, and Ground Shear-Strain in Malang City, East Java Situmeang, Adedio Daniel; Saputra, M. Rizky; Ramadhan, Yuansyah Dhaniar; Cholisatin, Safira Nur; Asyfiya, Divana Zumrotul; Madlazim, Madlazim; Fahmi, Muhammad Nurul; Safrian, Alif Haidar; Putri, Rasamala I.W; Realita, Arie
Prisma Sains : Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Vol. 14 No. 1: January 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-ps.v14i1.17820

Abstract

Seismic activity in Malang City is very high due to tectonic dynamics in the subduction zone between the Indian-Australian and Eurasian plates and the active local faultsm, including the northeast-southwest trending Watukosek Fault, and the east-west fault around the Pasuruan Fault, which have the potential to cause damaging ground shaking in Malang City. The BMKG also recorded an earthquake with a magnitude of 4.5 Mw on March 16, 2025. Based on these events, this study was conducted to analyze the vulnerability of Malang City, East Java, using the Horizontal-Vertical Spectral Ratio (HVSR) method by integrating the parameters of natural frequency (f0), amplification (Ag), soil vulnerability index (Kg), and Ground Shear-Strain (γ).  A total of 19 points were processed using Geopsy software to obtain the HVSR curve and obtain the f₀ and Ag values, while Kg and γ were obtained from processing the HVSR parameters and then mapped through spatial interpolation in ArcGIS. The results of data processing and analysis show that several points in Malang City have f0 1.448 - 9.938 Hz with amplification 1.704 - 6.639 and soil vulnerability index values 0.383 - 14.871, as well as shear strain values up to 0.009. Zones are mainly concentrated by high amplification and vulnerability are mainly concentrated in the northern part of Kedungkandang District, the eastern part of Blimbing District, and parts of Lowokwaru District, which are dominated by higher frequencies with low amplification, as well as the western part of Sukun District, indicating a high level of earthquake risk.  While previous studies primarily utilized only utilized natural frequencies and amplification, whereas this study offers HVSR-based microzonation by integrating dynamic soil parameters (f₀, Ag, Kg, and γ).
ANALYSIS OF SOIL DYNAMICS AND GROUND MOVEMENT VULNERABILITY USING THE HVSR METHOD BASED ON MICROTREMOR MEASUREMENTS IN THE SEMPU AREA, PASURUAN Ramadhan, Yuansyah Dhaniar; Situmeang, Adedio Daniel; Saputra, M. Rizky; Cholisatin, Safira Nur; Asyfiya, Divana Zumrotul; Safrian, Alif Haidar; Fahmi, Muhammad Nurul; Madlazim, Madlazim; Realita, Arie
Indonesian Physical Review Vol. 9 No. 1 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i1.561

Abstract

The Sempu Area, located in Cowek Village, Purwodadi Subdistrict, Pasuruan Regency, has a high potential for ground movement due to its lithological conditions, which consist of loose volcanic deposits and weathered sedimentary rocks, thereby increasing the risk of seismic wave amplification. This study aims to analyze the dynamics and soil vulnerability to ground movement phenomena using the Horizontal-to-Vertical Spectral Ratio (HVSR) method based on microtremor data. Data collection was conducted at 15 measurement points using a three-component seismograph, with a recording duration of 20 minutes per point. The data were analyzed using SeismoWin for signal filtering, Geopsy for extracting the fundamental frequency (f₀) and amplification values, and Surfer and ArcGIS for spatial visualization in the form of dominant frequency maps, amplification maps, and soil vulnerability index (Kg) distribution. The results showed that the dominant frequency values ranged from 2.75 to 5.92 Hz, with a maximum amplification value of 6.18. The most vulnerable zones were identified in the central part of the hamlet, specifically at points 10 and 14, which exhibited the highest Kg value of 14.12. These findings indicate the presence of significant local resonance zones arising from unconsolidated lithology, thereby increasing the risk of damage from seismic shaking. The implications of this study support land-use planning based on seismic microzonation and the development of more precise disaster mitigation strategies in areas prone to ground movement.
Co-Authors Asyfiya, Divana Zumrotul Cholisatin, Safira Nur Diah Hari Kusumawati Fahmi, Muhammad Nurul Huda, Naufal Mumtas Madlazim Madlazim Madlazim Nugrahani Primary Putri Nurdin Nurdin Putri, Rasamala I.W Realita, Arie Safrian, Alif Haidar Saputra, M. Rizky Situmeang, Adedio Daniel