Maming
Universitas Hasanuddin

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PELATIHAN GURU DAN SISWA TENTANG PENGUKURAN EMISI GAS KARBON MONOKSIDA (CO) DAN NITROGEN OKSIDA (NOX) PADA KENDARAAN BERMOTOR Abdul Wahid Wahab; Nursiah La Nafie; Paulina Taba; Yusafir Hala; Maming; Abdul Karim; Andi Muhammad Anshar; Triana Febrianti; Nuritasari Azis
Panrita Abdi - Jurnal Pengabdian pada Masyarakat Vol. 7 No. 3 (2023): Jurnal Panrita Abdi - Juli 2023
Publisher : LP2M Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/pa.v7i3.22908

Abstract

Maros Regency is a crossing area to the city of Makassar. So, transportation facilities to support mobility and community activities in several places to the city of Makassar must go through the town of Maros. Therefore, the number of vehicles that pass through the city of Maros will continue to increase from year to year, which will cause pollution or air pollution for the environment. To achieve beautiful environmental conditions, especially at the location of Senior High School 1 Maros, it is necessary to hold community service by introducing, applying, and utilizing the PEM-9004 tool on motorized vehicles, especially vehicles belonging to students at Senior High School 1 Maros. The test results show that the emission levels of carbon monoxide (CO) gas from students' vehicles are 1.791%, the levels of nitrogen oxides (NOx) and nitrogen monoxide (NO) are seven ppm each, and the gas temperature is 45°C with a test time of 1 minute. The CO concentration is still below the threshold set by the government in the Regulation of the State Minister for the Environment No. 05 of 2006, which is the concentration of CO gas emitted by motor vehicles with gasoline fuel at idle conditions of ≤5.5%.  ---  Kabupaten Maros adalah daerah perlintasan menuju kota Makkassar. Sehingga sarana transportasi untuk menunjang mobilitas dan aktivitas masyarakat di beberapa daerah menuju kota Makassar harus melalui kota Maros. Oleh karena itu, jumlah kendaraan yang melewati kota Maros akan terus meningkat dari tahun ke tahun yang akan menimbulkan pencemaran atau polusi udara bagi lingkungan. Untuk menghasilkan kondisi lingkungan yang asri khususnya di lokasi SMA Negeri 1 Maros maka perlu diadakan pengabdian masyarakat dengan cara pengenalan dan pengaplikasian serta pemanfaatan alat PEM-9004 pada kendaraan bermotor khususnya kendaraan milik siswa di SMA Negeri 1 Maros. Hasil pengujian menunjukkan bahwa kadar emisi gas karbon monoksida (CO) dari kendaraan milik siswa adalah 1,791 %, kadar nitrogen oksida (NOx) dan nitrogen monoksida (NO) adalah masing-masing 7 ppm dan temperatur gas 45°C dengan waktu pengujian 1 menit. Konsentrasi CO masih berada di bawah ambang batas yang ditetapkan oleh pemerintah di dalam Peraturan Menteri Negara Lingkungan Hidup No. 05 Tahun 2006 yaitu konsentrasi gas CO yang diemisikan oleh kendaraan bermotor dengan bahan bakar bensin pada kondisi idle ≤5,5%.
Determination of the Coral Age from Keraton Buton Fort, Baubau City, Based on 14C Activities Using Liquid Scintillation Counting Method Maming; Muhammad Zakir; Andi Tenrisa'na; Zulfhadyanti Rais; Sitti Syara Ramadani; Ajuk Sapar
Urania: Jurnal Ilmiah Daur Bahan Bakar Nuklir Vol. 32 No. 1 (2026): Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir
Publisher : Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/urania.2026.13606

Abstract

Determination of the age of the corals that make up Keraton Buton Fort based on 14C activity using the LSC (Liquid Scintillation Counting) method has been carried out. The coral samples analyzed were the corals that made up the fort taken from the gate of Keraton Buton Fort and a coral sample from the beach of Makassar Island Baubau, asmodern coral. Sample preparation was carried out physically and chemically using a mixture of NaOH with 30% H2O2, followed by a mixture of HClO4with 30% H2O2, and finally with 5% HCl solution to produce a clean and whiter-looking sample with a weight reduction of 10.5% -15.8%. The carbonate of coral samples was separated as CO2by reaction with 10% HCl and absorption by KOH 1 N solution as K2CO3. The total carbon in the two fort coral sample and modern coral was 0.129, 0.132, and 0.129 grams, respectively, and was obtained through the titration method. The specific activity of 14C in the samples was 13.95 DPM/gC and 14.38 DPM/gC in both fort coral samples, and 15.48DPM/gC in modern coral. The age of the coral samples of Keraton Buton Fort calculated fromthe 14C specific activity data was between 817 ± 0.123 and 565 ± 0.105 years, which is older than the ages of the Keraton Buton Fort according to the historical reviews.