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All Journal IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Mantis Journal of Fisheries
Utami, Nyimas Ulfatry
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Education Environmental Science Immunology & microbiology Physics Social Sciences

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Analisis Perbandingan Kualitas Air Laut Tahun 2023-2024 di Dermaga Pantai Penganak, Kabupaten Bangka Barat, Kepulauan Bangka Belitung Utami, Nyimas Ulfatry; Ibrahim, Eddy; Saputra, Anton
Mantis Journal of Fisheries Vol. 2 No. 01 (2025): April 2025
Publisher : Department of Fisheries, Animal Science Faculty, Universitas Jambi.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/mjf.v2i01.42298

Abstract

Penelitian ini membandingkan kualitas air laut di Dermaga Pantai Penganak, Kabupaten Bangka Barat, Kepulauan Bangka Belitung pada tahun 2023 dan 2024. Kajian ini dilakukan untuk mengetahui dampak aktivitas penambangan timah laut terhadap parameter fisika dan kimia air laut. Pengambilan sampel dilakukan di beberapa titik dengan parameter utama yang dianalisis meliputi TSS, pH, salinity, kadar amonia (NH₃-N) dan sulfida (H2S), kadar logam berat (Hg, Pb, Cd, Cu, dan Zn) serta beberapa parameter lainnya. Hasil penelitian menunjukkan adanya fluktuasi kualitas air antara kedua tahun tersebut, dengan peningkatan kadar logam berat di beberapa titik yang diduga berasal dari aktivitas pertambangan. Meskipun sebagian besar parameter masih berada dalam batas baku mutu yang ditetapkan, terdapat indikasi penurunan kualitas air laut yang perlu menjadi perhatian. Oleh karena itu, diperlukan pengelolaan lingkungan yang lebih ketat serta upaya mitigasi untuk mengurangi dampak pencemaran akibat aktivitas pertambangan di wilayah tersebut.
Analisis Kesesuaian Penggunaan Lahan dengan Rencana Pola Ruang di Kabupaten Ogan Ilir Ar-Rouf, Ferdian Budi; Adianto, Muhammad Obby; Gustama, Muhammad Agni; Utami, Nyimas Ulfatry
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 1 (2026): Februari
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i1.1732

Abstract

Abstract Ogan Ilir Regency is included in the development program as a buffer zone for Palembang City, which is part of the Sriwijaya Megaregion, due to its distance of approximately 35 km. Ogan Ilir Regency has established a Spatial Planning (RTRW) Plan for 2023–2024. This RTRW serves as the basis for policy direction and the development of urban areas. Therefore, research on spatial analysis is necessary to evaluate existing development. This study uses descriptive analysis with a spatial approach, namely a Geographic Information System (GIS). The software used is QGIS, which is open-source. The data sources include Sentinel satellite imagery and the Spatial Planning Map of Ogan Ilir Regency. The analysis applies supervised classification to identify existing land use. The results show that 11,461.4 hectares of land use are not in accordance with the Ogan Ilir RTRW. The largest area of inconsistency is found in North Indralaya District, which is planned as an urban area but is still predominantly used for oil palm agricultural land.
Stoichiometric Combustion Modeling and Regulatory Compliance Assessment of Indonesian Sub-bituminous Coal: Implications for Clean Coal Technology Deployment Purba, Robekca; Utami, Nyimas Ulfatry
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 11, No 1 (2026): February 2026
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v11.i1.59

Abstract

Coal is an important energy source, but its utilization must consider quality and environmental aspects for sustainability. This study aims to characterize coal from Muara Enim Regency and to evaluate its energy utilization potential. A 2.365 kg coal sample was analyzed at Geoservice laboratory, Bandung. Proximate analysis results showed total moisture 6.26%, ash content 10.63%, volatile matter 37.84%, and fixed carbon 47.71%. Ultimate analysis revealed carbon 68.56%, hydrogen 5.12%, nitrogen 1.42%, oxygen 13.71%, and sulfur 0.56%. The calorific value is 6,900 kcal/kg with fuel ratio 1.26. These parameters classify the coal as Sub-bituminous B with good combustion characteristics. Stoichiometric calculations determined theoretical air requirements of 2.24 kg/kg coal, producing 2.51 kg CO₂, 0.46 kg H₂O, 0.0009333 kg NO2 and 0.0112 kg SO₂. Theoretical SO₂ emissions (1.557 mg/Nm³) exceed Indonesian regulations, requiring Flue Gas Desulfurization (FGD) installation. The coal has good energy potential with low sulfur content, suitable for power generation with proper emission control technology. This study provides a database for optimizing energy systems and clean coal technologies..Keywords: coal characterization; calorific value; combustion stoichiometry; clean coal technology, coal chemistry
Co-Authors Adianto, Muhammad Obby Anton Saputra, Anton Ar-rouf, Ferdian Budi Eddy Ibrahim Gustama, Muhammad Agni Robekca Purba