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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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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 Dwiria Wahyuni; Mega Nurhanisa; Ya’ Muhammad Arsyad; Mia Audina
Jurnal Penelitian Pendidikan IPA Vol 11 No 11 (2025): November
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.
Quality Study of Activated Carbon/TiO2 Composite Based on Activated Carbon Granule Size Mega Nurhanisa; Dwiria Wahyuni; Ya' Muhammad Arsyad
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 22, No 1 (2025): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v21i3.17999

Abstract

Activated carbon (AC) composited with TiO2 photocatalyst can be used as a material that can purify wastewater. This research aims to obtain the optimum particle size of AC as a buffer for AC. The work began by making AC from oil palm empty fruit bunches (OPEFB) waste with various particle sizes, namely 50 mesh, 100 mesh, 150 mesh, and 200 mesh. AC was synthesized by carbonizing the raw materials at 500 °C and then activated using a microwave oven at 500 watts for 15 minutes. Furthermore, AC/TiO2 composites were synthesized using a microwave oven under similar conditions. Spectroscopy Electron Microscopy (SEM) characterization was done to see the morphology of AC and AC/TiO2 composites. To determine the performance of AC and AC/TiO2 composites, the degradation process of methylene blue (MB) solution was carried out. Characterization with a UV-Vis spectrophotometer was done as a quantitative method to measure the level of MB degradation. The results of MB degradation for 6 hours of irradiation showed that 200 mesh particles achieved the highest efficiency of 86.19%. Thus, using TiO2 has been shown to improve the performance of AC, with those of 200 mesh degrading MB the most.
Sintesis Karbon Aktif dari Tandan Kosong Kelapa Sawit (TKKS)/ZnO Terdeposisi pada Polistirena untuk Mereduksi Kadar Besi (Fe) dalam Air Gambut Apriyani, Nanda Ayu; Nurhanisa, Mega; Wahyuni, Dwiria
Newton-Maxwell Journal of Physics Vol. 7 No. 1: April 2026
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/nmj.v7i1.40814

Abstract

Peat water contains iron (Fe) levels exceeding health standards, causing a brownish color, metallic odor, and adverse health effects. This study aims to reduce Fe levels in peat water using a composite of activated carbon (AC) from oil palm empty fruit bunches (EFB), zinc oxide (ZnO), and polystyrene (PS). Activated carbon synthesis was conducted through physical activation using microwaves at 600 watts for 15 minutes. ZnO is suggested to act as a photocatalyst enhancing adsorption performance and enhance Fe adsorption efficiency, while PS acts as a binder for the composite. The effectiveness was tested with ZnO concentrations of 10%, 15%, 20%, and 25%, with contact times of 2, 4, and 6 hours. The highest Fe reduction was achieved at a ZnO concentration of 25% with a 4-hour contact time, reducing Fe levels by 74.01%. However, at a 6-hour contact time, the adsorption efficiency decreased due to saturation and potential desorption. These findings indicate that the KA/ZnO/PS composite is a promising adsorbent material for peat water treatment
Uji kinerja Lapisan Komposit Adsorben dari Karbon Aktif Buah Bintaro (Cerbera odollam) dan Zeolit pada Permukaan Polisterina untuk Adsorpsi Metilen Biru Damara, Doni; Nurhanisa, Mega; Arsyad, Ya’ Muhammad; Wahyuni, Dwiria
Newton-Maxwell Journal of Physics Vol. 7 No. 1: April 2026
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/nmj.v7i1.40816

Abstract

Metilen biru (MB) seringkali dirujuk sebagai pewarna sintetis dalam industri tekstil. Keberadaannya di dalam air harus dihilangkan karena beresiko terhadap sistem hayati dan lingkungan. Salah satu metode untuk mengurangi zat warna MB adalah dengan menggunakan adsorpsi dari material komposit adsorben berbasis karbon aktif dan zeolit. Sebagai upaya pembaharuan, karbon aktif dan zeolit dideposisikan pada permukaan polisterina dengan tujuan agar tidak dilakukan penyaringan pada akhir pemrosesan air. Penelitian ini bertujuan untuk melihat pengaruh komposisi massa komposit adsorben dalam mereduksi zat warna MB. Pada penelitian ini karbon aktif disintesis dari buah bintaro pada suhu karbonisasi 500 selama 1 jam dengan aktivator gelombang mikro dengan daya 600 watt selama 15 menit. Zeolit komersil diaktivasi pada suhu 500 selama 2 jam. Komposit adsorben kemudian dibuat dengan mencampurkan karbon aktif dan zeolit selama 30 menit menggunakan mixer, lalu dideposisikan pada permukaan granular polisterina menggunakan teknik thermal milling. Hasil pengujian Spektrofotometer UV-Vis menunjukkan bahwa komposit adsorben dapat mereduksi zat warna MB hingga 8 jam waktu kontak. Komposisi optimal terjadi pada karbon aktif 25% dan zeolit 75% (K25:Z75) dengan efektivitas yang didapatkan sebesar 32,75%. Dengan demikian, lapisan komposit adsorben pada permukaan polisterina dapat mereduksi zat warna MB.
Co-Authors Abdurrahman Bahtiar Abdurrahman Bahtiar Anderesta, Fani Chelsea Anugrah, Emilia Tresna Apriyani, Nanda Ayu Aqni, Wahyu Nur Arsyad, Ya' Muhammad Arsyad, Ya’ Muhammad Asifa Asri Asterina, Asterina Ayunda Dwi Handayani Azrul Azwar Bintoro Siswo Nugroho Dala Novika Sandi Damara, Doni 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 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 Ya' Muhammad Arsyad Ya’ Muhammad Arsyad Zahraini Tasya Siregar Zeny Oktaviani Zeny Oktaviani Zulfian Zulfian