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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%.
Analysis of total phenolics and flavonoids content from methanol extract of Caesalpinia bonduc (L.) Roxb. seeds and antioxidant activity assay Samriani Samriani; Hasnah Natsir; Seniwati Dali; Abdul Wahid Wahab; Nunuk Hariani Soekamto; Paulina Taba
RAFFLESIA JOURNAL OF NATURAL AND APPLIED SCIENCES Vol. 2 No. 2 (2022): Oktober
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rjna.v2i2.23929

Abstract

Caesalpinia bonduc (L.) Roxb. seed is known as gorek seed contain secondary metabolites such as alkaloids, tannins, flavonoids, and phenolics, due to the content of these secondary metabolites so that this plant has antioxidant activity. This study aimed to determine total phenolic and flavonoid contents of methanol extract of gorek C. bonduc seeds as well as antioxidant activity. Extraction of gorek C. bonduc seeds was carried out with methanol, then quantitative determination of total phenolic by the Folin-Ciocalteu method as Gallic Acid Equivalent (GAE)/gram of extract, flavonoid content by AlCl3 method as Quercetin Equivalent (QE)/gram of extract, and in vitro antioxidant activity with DPPH (2,2-diphenyl-1-picrylhydrazyl) method was in IC50 (inhibition concentration). Based on the results of research, the phytochemical screening of methanol extract of gorek C. bonduc seeds showed alkaloids, flavonoids, saponins, tannins, and phenolics. The determination of the total phenolic and flavonoid content were obtained 0.55 ± 0.02 mgGAE/g and 0.50 ± 0.02 mgQE/g, respectively. The antioxidant activity of methanol extracts and ascorbic acid showed IC50 values were 3770.77 ppm and 3.36 ppm respectively.