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All Journal POSITRON PRISMA FISIKA JURNAL FISIKA Phi : Jurnal Pendidikan Fisika dan Terapan Jurnal Fisika Unand Jurnal Fisika FLUX Jurnal Rekayasa Sipil Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Ilmu Fisika Jurnal Fisika dan Terapannya JRFES Newton-Maxwell Journal of Physics
Mega Nurhanisa
Jurusan Fisika Universitas Tanjungpura
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation Other

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Optimasi Sintesis Karbon Aktif dari Bambu Buluh (Schizostachyum brachycladum) dengan Variasi Suhu Karbonisasi untuk Penyerapan Besi pada Air Sumur Gambut Wahyuni, Dwiria; Nurhanisa, Mega; Bahtiar, Abdurrahman; Rutdiyanti, Rutdiyanti
Jurnal Fisika Unand Vol 11 No 3 (2022)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.11.3.292-298.2022

Abstract

Karbon aktif merupakan salah satu adsorben yang banyak digunakan sebagai material penjernihan air. Pada umumnya, karbon aktif dapat disintesis dari berbagai limbah biomassa yang tidak digunakan seperti bambu buluh (Schizosachyum brachycladum). Penelitian ini bertujuan untuk mendapatkan suhu karbonisasi optimum sintesis karbon aktif yang dilihat dari penyerapan tertinggi kadar besi pada air sumur gambut. Artikel ini juga menjabarkan  hubungan antara suhu karbonisasi dan ukuran pori terhadap daya serap karbon aktif. Sintesis karbon aktif diawali dengan proses karbonisasi pada suhu 400, 450, 500, 550, dan 600°C (60 menit), kemudian dilanjutkan dengan proses aktivasi dengan mencampurkan bahan baku dengan larutan H3PO4 10% (24 jam) dilanjutkan pemanasan pada 900°C (60 menit). Ukuran pori dan morfologi permukaan karbon aktif digambarkan dengan menggunakan scanning electron microscope (SEM). Berdasarkan penelitian yang telah dilakukan, karbon aktif yang dikarbonisasi pada suhu 500°C memiliki daya serap dan ukuran pori optimal, dengan efektivitas serapan sebesar 73,03% dengan ukuran pori sebesar 40 µm. Semakin besar ukuran pori karbon aktif, maka kemampuannya menyerap Fe dalam air sampel semakin juga semakin besar Penggunaan suhu di atas 500°C dapat merusak dinding pori karbon aktif. Dengan demikian, sintesis karbon aktif dari bambu buluh akan optimal jika dilakukan karbonisasi pada suhu 500°C
Pengaruh Variasi Jenis Bahan Terhadap Pengurangan Taraf Intensitas Bunyi Sandi, Dala Novika; Wahyuni, Dwiria; Nurhasanah, Nurhasanah; Muliadi, Muliadi; Hasanuddin, Hasanuddin; Nurhanisa, Mega
Jurnal Fisika Unand Vol 12 No 3 (2023)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.12.3.367-372.2023

Abstract

Acoustic materials such as plastic carpet, gypsum board, styrofoam and plywood can be used to reduce sound intensity. Nevertheless, the existing research has generally focused on single-ingredient studies. In this research, the optimum thickness of each material will be sought based on its efficiency in reducing the sound intensity level. Besides that, the efficiency of various types of materials will also be tested for reducing the level of sound intensity. In this study, a resonator tube was used in making measurements. Acoustic materials used as test materials, both single materials and combined materials, can be placed in the resonator tube. The distance between the sound source and the detector is 30 cm, with the position of the detector right behind the acoustic material. Tests on a single material show that the measured sound intensity level decreases in proportion to the thickness of the acoustic material, with styrofoam has the lowest efficiency. Meanwhile, the combined material that combines plastic carpet material at a frequency of 2000 Hz has an efficiency value that tends to be higher than the combination of materials without carpet with efficiency >30%. However, at a frequency of 1500 Hz, all combined materials have efficiency values that are not significantly different. All models of material combinations are proven to be able to reduce sound intensity levels compared to single materials. Thus, it can be concluded that the combined material has the potential as an efficient acoustic material.
Characterization of Green-Synthesized Reduced Graphene Oxide using Aloe vera Extract and Its Application for Surface Water Treatment Wahyuni, Dwiria; Nurhanisa, Mega; Arsyad, Ya’ Muhammad; Audina, Mia
Jurnal Penelitian Pendidikan IPA Vol 11 No 11 (2025): November: In Progress
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i11.12512

Abstract

Reduced graphene oxide (rGO) is a carbon-based material with high surface area and chemical stability, making it an effective adsorbent for water purification. This study investigates the green synthesis of rGO using Aloe vera extract as a natural reducing agent and its application in treating surface water from the Kapuas River, Indonesia. Graphene oxide was reduced with Aloe vera extract under varying time conditions, and the resulting rGO samples were characterized to confirm the reduction process. The structural and compositional analyses revealed that increasing reduction time enhanced oxygen removal and improved surface morphology. The application tests showed that rGO substantially improved water quality: color decreased from 225 to 95 PCU (57.8% reduction), turbidity dropped from 16.2 NTU to 1.2 NTU (92.4% removal), and dissolved iron concentration decreased from 0.65 ppm to 0.37 ppm (43.07% removal), with pH remaining stable near 6.5. Among all samples, rGO reduced for 120 minutes achieved the highest purification efficiency. These findings demonstrate the feasibility of Aloe vera-reduced rGO as a sustainable adsorbent for surface water purification.
Co-Authors Abdurrahman Bahtiar Abdurrahman Bahtiar Agus Setiawan Anderesta, Fani Chelsea Anugrah, Emilia Tresna Aqni, Wahyu Nur Arsyad, Ya' Muhammad Arsyad, Ya’ Muhammad Asifa Asri Asterina, Asterina Ayunda Dwi Handayani Azrul Azwar Bintoro Siswo Nugroho Dala Novika Sandi Delia Amanda Dessy Ariani, Dessy Dwiria Wahyuni Elsa Narulita Eneng Maryani Faradina, Faradina Fatisa, Huril Frinelda Rehulina Barus Harmawanda, Salsabila Hasanuddin Hasanuddin Hasanuddin Hasanuddin Hilyana Agis Risla Ilham Lazuardy Arief Irfana Diah Faryuni Irfana Diah Faryuni Jonoko, Roni Latifah Tri Amanda Lestari, Deity Liana, Tila Mariani Mariani Marjuki Marjuki Masela, Patrisia Maulida Siti Maryam Mia Audina, Mia Muliadi Muliadi Muliadi Nirwanasari, Nirwanasari Nurhasanah Nurhasanah Nurhasanah Nurhasanah Parnasari Parnasari Pujiasih, Dyah Ayu Rahayu Rahayu Rahimawati, Rahimawati Rutdiyanti Rutdiyanti Rutdiyanti, Rutdiyanti Sandi, Dala Novika Siti Helmyati Susana Susana Susanto, Yuris Tri Rahma Febrianti Maharani Wahyu Hidayat Wahyu Hidayat Weni, Weni Zahraini Tasya Siregar Zeny Oktaviani Zeny Oktaviani Zulfian Zulfian