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All Journal Jurnal Pijar MIPA Jurnal Rimba Lestari
Salsabila, Nandita Pasya
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Mathematics Physics

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MORFOMETRI DAUN Rhizophora mucronata DI PULAU TEMUDONG DAN PULAU KERAMAT KECAMATAN UTAN SUMBAWA NTB Salsabila, Nandita Pasya; Latifah, Sitti; Hidayati, Eni
JURNAL RIMBA LESTARI Vol 2 No 1 (2022): Vol. 2 No. 1 (2022)
Publisher : Jurusan Kehutanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/rimbalestari.v2i1.1352

Abstract

Leaf morphometric is the leaf length and width ratio that become one of the mangrove health indicators. This study aims to compare the leaf morphometric variations of Rhizophora mucronata on Temudong and Keramat Islands in Labuhan Bajo Village, Utan District, Sumbawa. Determination of the sample point is done using purposive sampling. As many as 40 leaves were taken that had a perfect shape. The petiole measurement on Temudong and Keramat Island obtained were as many as two (2) variations. The leaf morphometry variations ranging from 1 to 2 indicated that the health condition of Rhizophora mucronata on both islands was not disturbed. This condition is supported by the water quality of Temudong, where the temperature range between 29-34°C; water pH 7,6-7,8, salinity 30-32 ppt, and DO 2,15-3,24 mg/l. While in Keramat Island, the temperature range between 29,4-29,9°C; water pH 7,29-7,42, salinity 30-32 ppt, and DO 2,26-4,31 mg/l.
Characteristics of Briquettes Made from Plastic Waste, Plastic-Coconut Shell Blends, and Plastic-Corn Cob Composites Djola, Wiwin Iswandi; Prasetyo, Dhimas Mardyanto; Salsabila, Nandita Pasya; Sadir , Muhammad; Hidayati, Eni
Jurnal Pijar Mipa Vol. 20 No. 3 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i3.8393

Abstract

Recycling plastic waste holds considerable potential as a fuel source, especially when combined with agricultural waste. This study aims to evaluate the physical characteristics of charcoal briquettes - moisture content, ash content, volatile matter, calorific value, and fixed carbon content - produced from a mixture of plastic waste and organic waste. Three composition variations were tested: pure Low Density Polyethylene (LDPE) plastic waste (100%) as the first treatment (S1), a combination of coconut shells and plastic waste in a 50%:50% ratio as the second treatment (S2), and a combination of corn cobs and plastic waste in the same 50%:50% ratio as the third treatment (S3). Testing was conducted according to SNI 01-6235-2000 standards. The results showed that all treatments produced charcoal briquettes with moisture content and calorific value that met SNI standards. Among the treatments, briquettes made entirely from plastic waste (S1) achieved the highest calorific value at 5921 cal/g, followed by the plastic-coconut shell mixture (S2) at 5574 cal/g and the plastic-corn cob mixture (S3) at 5100 cal/g. These findings indicate that plastic waste and agricultural waste have significant potential as fuel sources for power generation, supporting energy mix targets, and contributing to waste management and sustainable energy production. However, the study also identified areas for improvement. The ash content across all treatments failed to meet SNI standards, and the volatile matter content in S1 was below the acceptable range. These shortcomings highlight the need for further optimization in material formulation and manufacturing processes to enhance briquette quality. Future research should prioritize refining material combinations, improving ash content and volatile matter characteristics, and assessing the environmental impacts of using plastic-based briquettes. With continued innovation, this approach could play a pivotal role in achieving energy mix targets and addressing the challenges of plastic and agricultural waste, offering a sustainable and practical solution for energy generation.
Co-Authors Djola, Wiwin Iswandi Eni Hidayati Prasetyo, Dhimas Mardyanto Sadir , Muhammad Sitti Latifah