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All Journal Jurnal Pengabdian Nusantara (JPN) International Journal of Acta Material
Alimin Alimin
Department Of Chemistry. Faculty Of Mathematics And Natural Sciences. Halu Oleo University. Kendari. Indonesia.
Agriculture, Biological Sciences & Forestry Humanities Chemistry Computer Science & IT Materials Science & Nanotechnology Physics Social Sciences Other

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SOSIALISASI PENCEGAHAN PENYEBARAN COVID-19 DI KABUPATEN MUNA BARAT TAHUN 2020 La Ode Nggawu; Siam Siam; Wa Ode Fatmawati; Alimin Alimin
Jurnal Pengabdian NUSANTARA Vol 1, No 1 (2021): Januari-Juni
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (162.817 KB) | DOI: 10.33772/jpnus.v1i1.17449

Abstract

In Indonesia, since the first two cases of COVID-19 announced on March 2, 2020, the number of cases has continued to increase in 32 provinces. Seeing this situation, the acceleration of COVID-19 snacks must be carried out thoroughly and involve all parties including universities. This community service aims to support and strengthen the Covid-19 prevention and prevention program carried out by the Central Government and Regional Governments. This service is done in the form of online education through social media namely Facebook, WhatsApp, and Instagram. Also, to support online socialization, activities were carried out on distributing masks, installing banners, and leaflets about preventing the spread of Covid-19 and making handwashing (Westafel portable). Online socialization activities are carried out by creating a WhatsApp group as a media to disseminate information related to preventing the spread of Covid-19; mask distribution is done by delivering directly to the residents' houses to prevent the crowd; pamphlets are installed in public places such as markets, village halls, places of worship and schools; making washing places for hands in public places and places of worship; and banners in several districts of Tiworo Raya, Lawa Raya, and Kusambi Raya. With the Covid-19 Prevention socialization conducted by the UHO Thematic KKN team in West Muna, it was very helpful in raising public awareness to avoid Covid-19.
Effect of pH and Stirring Speed on the γ-Fe2O3 Material Properties Synthesized from Iron Sand by Using Co-Precipitation Method L Agusu; Amiruddin; M. Nalis; S. Misudo; Y. Fujii; Y. Ishikawa; Alimin
International Journal of Acta Material Vol. 1 No. 1 (2024): August 2024
Publisher : Faculty Mathematics and Natural Sciences, Halu Oleo University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62749/ijactmat.v1i1.6

Abstract

Research has been conducted to investigate the impact of pH and stirring on the magnetic properties of γ-Fe2O3 nanoparticles derived from iron sand using the co-precipitation method. The objective of this study was to synthesize γ-Fe2O3 nanoparticles and examine how pH and stirring affect their size and properties. The co-precipitation method involved mixing iron sand with HCl as a solvent and NH4OH as a precipitator. The experimental setup included variations in pH, specifically pH 10 and pH 12, as well as stirring speeds of 600 rpm and 700 rpm. The synthesized maghemite nanoparticles were characterized using XRD (X-Ray Diffraction), SEM (Scanning Electron Microscope), and VSM (Vibrating Sample Magnetometer) techniques. XRD analysis revealed that the particle size at 600 rpm under pH 10 was 52.085 nm, whereas at 700 rpm under pH 12 it was 47.821 nm. The VSM characterization results demonstrated a remanent magnetization of 25.5 emu/gr, a coercivity field of -0.01 Tesla, and a saturation magnetization of 52.45 emu/gr. This study confirmed that the maghemite nanoparticles produced exhibited ferromagnetic properties.
Study of Equilibrium and Kinetics of Ag(I) Metal Ions Adsorption on Carbon Nanofibers and Its Potential Test as X-Ray Anti-Radiation Material L. O. Ahmad; W. O. A. Sulastri; Alimin; L. O. A. N. Ramadhan; H. Ritonga; Alwahab Alwahab; S. J. Sentosa; A. A. Umar
International Journal of Acta Material Vol. 2 No. 2 (2026): February 2026
Publisher : Faculty Mathematics and Natural Sciences, Halu Oleo University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62749/ijactmat.v2i2.33

Abstract

X-ray radiation is an electromagnetic wave with short waves and has been widely used in the medical world, if excessive use can cause harm to the body.  The purpose of this research are to know adsorption capacity and kinetics of CNFs adsorption to Ag (I) metal ion and its potential test as X-ray anti-radiation material. This research uses liquid phase adsorption method with the help of ultrasonic wave in the process of attaching metal ion Ag (I) with CNFs as adsorbent. The result,  showed the optimum adsorption process at 60 minutes, pH 8 and concentration of 20 mg/L. Ag(I) metal ions on CNFs maximum adsorption capacity was 398.4064  mg/g, with the adsorption process followed pseudo second order adsorption kinetics model. XRD test results in decreasing intensity after attachment of Ag (I) ions on CNFs and the potentially serve as X-ray anti radiation material.
Co-Authors A. A. Umar Alwahab Alwahab Amiruddin H. Ritonga L. O. A. N. Ramadhan La Agusu La Ode Ahmad La Ode Nggawu M. Nalis S. J. Sentosa S. Misudo Siam Siam W. O. A. Sulastri Wa Ode Fatmawati Y. Fujii Y. Ishikawa