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All Journal Indonesian Journal of Chemical Studies (Indones. J. Chem. Stud.) Darmabakti: Jurnal Pengabdian kepada Masyarakat Sorption Studies
Lestari, Aura Puja
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Health Professions Materials Science & Nanotechnology Mathematics Public Health

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Formulation of Digested Beverage Cans and Iron Plate Wastes as a Coagulant for Adequate Hygiene of Fresh River Water Gita, Mutiara; Stiawan, Elva; Renta, Hotma; Kuntjahjono, Mayang Fauziah Putri; Lestari, Aura Puja
Indonesian Journal of Chemical Studies Vol. 4 No. 1 (2025): Indones. J. Chem. Stud., June 2025
Publisher : Indonesian Scholar Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55749/ijcs.v4i1.57

Abstract

In terms of hygiene and sanitation, ensuring the availability of qualified water for those purposes remains challenging to perform under certain conditions. Accordingly, efforts to provide simple water processing technology are ongoing and innovatively developed. This study displayed an innovative approach to producing coagulants for water processing by utilizing metal salts obtained synthetically from used beverage cans and iron plates through the electrolysis principle and characterized using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and Scanning Electron Microscopy - The Energy Dispersive X-ray (SEM-EDX), subsequently. After mixing with calcium hypochlorite and adding to water sample, subsequently, the coagulant showed the ability to reduce the turbidity level and several categories of impurities, i.e., nitrate, nitrite, dissolved Manganese, Cr6+ ion, and microbial levels. Future research and development in formulating coagulants derived from digested beverage cans and iron plate wastes hold significant potential to advance sustainable and efficient water treatment technologies, ensuring improved hygienic quality of fresh river water while contributing to waste valorization and environmental protection.
Kolaborasi kampus–industri dalam program magang: Implikasi bagi pengembangan PT Dahana Lestari, Aura Puja; Haidar, Muhammad Hilman; Gunaryo, Gunaryo; Apriliyanto, Yusuf Bramastya; Alivia, Latisa Stefi; Anggara, Adrian Rezki
Darmabakti: Jurnal Pengabdian kepada Masyarakat Vol. 2 No. 1 (2025): November
Publisher : CV Rezki Media

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56003/darmabakti.v2i1.659

Abstract

Program magang merupakan salah satu bentuk implementasi pembelajaran berbasis pengalaman (experiential learning) yang dirancang untuk menjembatani kesenjangan antara teori yang diperoleh di bangku perkuliahan dengan praktik nyata di dunia kerja. Penelitian ini bertujuan untuk mengevaluasi kinerja mahasiswa magang dalam pelaksanaan program Magang Generasi Bertalenta (MAGENTA) BUMN di PT Dahana. Evaluasi ini dilakukan guna memperoleh gambaran menyeluruh mengenai kompetensi, kedisiplinan, tanggung jawab, serta kemampuan adaptasi mahasiswa selama kegiatan magang berlangsung. Metode penelitian yang digunakan adalah metode deskriptif kualitatif dengan pendekatan survei. Instrumen pengumpulan data berupa kuesioner tertutup yang disebarkan kepada pembimbing lapangan selaku penilai kinerja mahasiswa. Data yang diperoleh dianalisis untuk menilai efektivitas program magang dalam meningkatkan kemampuan profesional mahasiswa serta kontribusinya terhadap lingkungan kerja. Hasil penelitian menunjukkan bahwa secara umum mahasiswa magang memiliki kinerja yang baik, ditandai dengan tingkat kedisiplinan yang tinggi, rasa tanggung jawab terhadap tugas, dan kemampuan adaptasi yang cepat terhadap budaya kerja perusahaan. Program MAGENTA di PT Dahana terbukti memberikan dampak positif terhadap pengembangan kompetensi mahasiswa serta memperkuat hubungan kemitraan antara perguruan tinggi dan dunia industri.
Synthesis of Fe₃O₄ using the Co-precipitation Method with Temperature and Time Treatment as Methylene Blue Adsorbent Kuntjahjono, Mayang Fauziah Putri; Lestari, Aura Puja; Nurhalimah, Siti; Sarweswara, Wikrama; Purba, Farelino Oktavianus; Kaunang, Andrew Miracle; Sasongko, Nugroho Adi; Rahmat Basuki
Sorption Studies Vol. 1 No. 2 (2025): Sorption Studies, December 2025
Publisher : Indonesian Scholar Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55749/ss.v1i2.94

Abstract

Magnetite nanoparticles (Fe₃O₄) possess unique magnetic properties and are widely applied in various fields such as biomedical technology, environmental remediation, and material separation. This study reports the synthesis of Fe₃O₄ using the co-precipitation method under varying conditions of temperature, reaction time, and atmospheric exposure (open vs. closed system). Ferric and ferrous salts were reacted with ammonium hydroxide under controlled heating at 70°C and 80°C for 60 minutes. The synthesized materials were evaluated through visual color inspection, qualitative magnetic response, yield efficiency, and magnetic load-bearing capacity. The results showed that a closed system at 80°C produced the most optimal Fe₃O₄, indicated by a deep black color, strong magnetic attraction (149.86 mN), and a yield of 92.5%. Comparatively, open systems led to partial oxidation of Fe², resulting in less magnetic phases like maghemite or hematite. The findings confirm that controlling synthesis parameters, especially atmospheric exposure and temperature, significantly influences the purity, particle uniformity, and magnetic strength of Fe₃O₄ nanoparticles, highlighting the importance of optimized synthesis for practical applications.
Co-Authors Alivia, Latisa Stefi Anggara, Adrian Rezki Elva Stiawan Gita, Mutiara Gunaryo, Gunaryo Haidar, Muhammad Hilman Kaunang, Andrew Miracle Kuntjahjono, Mayang Fauziah Putri Nugroho Sasongko Jati, Nugroho Sasongko Purba, Farelino Oktavianus Rahmat Basuki Renta, Hotma Sarweswara, Wikrama Siti Nurhalimah Yusuf Bramastya Apriliyanto