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All Journal Jurnal Ilmu Dasar POSITRON PRISMA FISIKA Jurnal Penelitian Fisika dan Aplikasinya (JPFA) JURNAL FISIKA Phi : Jurnal Pendidikan Fisika dan Terapan Jurnal Fisika Unand SEMIRATA 2015 Jurnal Fisika FLUX Jurnal Rekayasa Sipil Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Biologi Tropis Jurnal Surya Masyarakat Jurnal Ilmu Fisika Jurnal Fisika : Fisika Sains dan Aplikasinya Jurnal Teori dan Aplikasi Fisika Jurnal Surya Masyarakat JRFES Newton-Maxwell Journal of Physics JuTISI (Jurnal Teknik Informatika dan Sistem Informasi)
Dwiria Wahyuni
Jurusan Fisika FMIPA Universitas Tanjungpura
Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Transportation Other

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Analisis Kinerja Metode Elektrokoagulasi Dengan Pelat Berlubang Dalam Upaya Peningkatan Kualitas Air Sumur Bor Asri, Asifa; Kornelia, Yenniarti; Wahyuni, Dwiria
POSITRON Vol 15, No 2 (2025): Vol. 15 No. 2 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/positron.v15i2.101568

Abstract

Ketersediaan air bersih tidak selalu mampu memenuhi kebutuhan masyarakat seiring meningkatnya jumlah penduduk, sehingga air sumur bor banyak dimanfaatkan sebagai sumber air alternatif. Namun, air sumur bor cenderung mengandung padatan tersuspensi, logam terlarut seperti besi, serta memiliki nilai pH yang tidak stabil sehingga perlu diproses melalui pengolahan awal untuk memenuhi standar kualitas air bersih. Penelitian ini mengevaluasi kinerja proses elektrokoagulasi dalam meningkatkan kualitas air sumur bor menggunakan elektroda pelat berlubang dengan variasi diameter lubang 7 mm, 5 mm, dan 3 mm, serta pelat tanpa lubang. Efisiensi proses dinilai menggunakan metode pembobotan multikriteria berdasarkan parameter kualitas air (kadar besi, kekeruhan, TDS, dan pH) serta performa operasi (massa anoda terlarut dan konsumsi energi listrik). Hasil menunjukkan bahwa pelat berdiameter 5 mm menghasilkan perbaikan kualitas air paling tinggi, dengan reduksi kadar besi sebesar 67,31%, kekeruhan 98,50%, TDS 30,65%, serta pH yang mencapai rentang normal. Dari aspek performa alat, pelat 5 mm menghasilkan pelarutan anoda minimum, sedangkan konsumsi energi terendah diperoleh pada pelat berdiameter 7 mm dengan nilai 42,44 kWh/m³. Berdasarkan skor pembobotan keseluruhan, pelat berlubang berdiameter 5 mm merupakan konfigurasi paling efisien dengan nilai efisiensi 76% dalam meningkatkan kualitas air sumur bor melalui proses elektrokoagulasi.
Utilization of Zn Powder as a Precursor in Synthesis of rGO/ZnO Composite for Decolorization of Batik Wastewater Wahyuni, Dwiria; Mariani, Mariani; Asri, Asifa; Arsyad, Ya Muhammad
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 15 No. 1 (2025)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v15n1.p12-26

Abstract

Batik wastewater contains high concentrations of synthetic dyes, significantly contributing to aquatic pollution. Photocatalysis is a promising method for degrading such dyes in textile effluents. This study aims to develop rGO/ZnO composites using zinc (Zn) powder as a precursor for photocatalytic applications. Reduced graphene oxide (rGO) was used as a substrate for ZnO particle formation. The composites were prepared by reacting Zn powder with rGO at varying loadings (5% and 10% by mass) in a neutral aqueous solution, followed by thermal treatment at 250 °C for 1 hour to facilitate Zn oxidation. The photocatalytic performance was evaluated by applying different masses of rGO/ZnO (0.2, 0.4, and 0.8 g) to degrade batik wastewater. Surface morphology and elemental composition were characterized using SEM-EDS. SEM analysis showed that rGO has a sheet-like structure, while ZnO exhibits spherical morphology. EDS confirmed the presence of Zn, C, and O as major elements with Nb impurity was identified in the composite. The carbon-to-oxygen (C/O) ratio increased after composite formation, reaching 4.23 for rGO/ZnO 5% and 3.79 for rGO/ZnO 10%. XRD characterization of rGO/ZnO confirms the presence of ZnO in the composite, with residual Zn peaks indicating incomplete oxidation of the Zn precursor. Photocatalytic activities modeled using pseudo-first-order kinetics reveal the 10% rGO/ZnO composite (0.8 g) shows the degradation efficiency of 67.91%, with a rate constant of 0.1623 h⁻¹. The efficiency may be affected by the complex nature of batik wastewater, particularly wax and resin residues that hinder photocatalytic activity. In conclusion, these findings highlight the potential of Zn powder as a precursor in the synthesis of rGO/ZnO composites with concentration of rGO and the mass variation of rGO/ZnO in the treatment of Batik wastewater affect the photocatalytic activity.
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.
Pembuatan Purwarupa Alat Ukur Konsentrasi CO2 Berbasis NodeMCU ESP8266 Fitria Yudita; Nia Syafitri; Dwiria Wahyuni
Jurnal Teori dan Aplikasi Fisika Vol. 11 No. 2 (2023): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v11i2.321

Abstract

Carbon dioxide (CO2) is the largest contributor to greenhouse gas emissions, resulting in an increase in global temperatures. Unfortunately, this knowledge is not yet widely known among the general public. Therefore, providing information on daily CO2 levels can serve as a means to educate and raise awareness about the dangers associated with CO2 levels. To simplify access to CO2 concentration information, a prototype of a CO2 concentration measurement device based on the NodeMCU ESP8266 microcontroller, which can be connected to Wi-Fi, has been developed. To ensure data accuracy, the CO2 measurement device was calibrated using the NodeMCU ESP8266 microcontroller and data from an outdoor CO2 monitoring instrument at the BRIN (BPAA Pontianak) office, with an error value of 4.08%. The collected data from this device can be accessed through the Blynk application or a Google Sheets link. The test results demonstrate that the device can provide CO2 concentration levels with higher readings in areas characterized by high vehicle traffic, smoking, combustion activities, or a crowd of people.
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.
Peningkatan Kompetensi Guru dalam Melaksanakan Praktikum Fisika pada Pembelajaran Jarak Jauh melalui Pelatihan Perangkat Analisis Video Bintoro Siswo Nugroho; Zulfian Zulfian; Yudha Arman; Asifa Asri; Dwiria Wahyuni
Jurnal Surya Masyarakat Vol 6, No 1 (2023): November 2023
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/jsm.6.1.2023.42-50

Abstract

The pandemic of COVID-19 has triggered awareness of the significant role of distance learning systems. Implementing science experiments, involving observation and measurement, requires more complex steps when conducted remotely online. An innovative method that can be used to address this issue is the combination of experimental demonstrations and video analysis. This article reports a training activity for the design and implementation of physics experiments using the video analysis software, Tracker, to improve the competence of physics teachers in conducting experiments through distance learning systems. The training was conducted through tutorials, demonstrations, practice sessions, work instructions, and online discussions. The impact of the training was measured by evaluating pre- and post-training questionnaires. The results indicate that the training can enhance participants' insights and competencies. This training provides an alternative solution for conducting laboratory experiments during face-to-face learning activity restrictions.
Co-Authors . Fauziah Abdillah, Retry Asykurani Abdurrahman Bahtiar Abdurrahman Bahtiar Agus Prasetiono Amanda, Ulvi Loly Andi Ihwan Apriani, Ririn Apriyani, Nanda Ayu Aqni, Wahyu Nur Arsyad, Ya Muhammad Arsyad, Ya' Muhammad Arsyad, Ya’ Muhammad Asifa Asri Asifa Asri Asifa Asri Asterina, Asterina Azrul Azwar Bintoro Siswo Nugroho Boni Pahlanop Lapanporo Dala Novika Sandi Damara, Doni Erwan Erwan, Erwan Fatisa, Huril Fitria Yudita Galuh Utamia Dillayati H., Cindy Priscilla Hardina, Ellan Harmawanda, Salsabila Hasanuddin Hasanuddin Hasanuddin Hasanuddin Hero Hartato Irfana Diah Faryuni Kornelia, Yenniarti Lestari, Tri Mukti Liana, Tila M. Yogi Riyantama Isjoni Mariana Bara'allo Malino Mariana Bara’allo Malino Mariani Mariani Marjuki Marjuki Masela, Patrisia Mega Nurhanisa Mia Audina Muliadi Muliadi Muliadi Mustafa, Usliana Neng Ayu Arini Nia Syafitri Nurhasanah Nurhasanah Nurhasanah Nurhasanah Nurhasanah Nurhasanah Nurhasanah Nurhasanah Perdhana, Radhitya Putri, Evi Pania Rahmadhani, Nur Winda Rajiah, Emi Riza Adriat Rutdiyanti Rutdiyanti Rutdiyanti, Rutdiyanti Sandi, Dala Novika Saputro, Febriyanto Joko Saron, Mawar Sinaga, Dian Tarni Siti Helmyati Suci Fitri Nazila Sumiati, Mimi Sumila Sumila Tri Handayani Wahyu Tri Hidayat Waliidaturrahmaniah, Waliidaturrahmaniah Ya' Muhammad Arsyad Ya' muhammad Arsyad Ya' Muhammad Arsyad Ya’ Muhammad Arsyad Ya’ Muhammad Arsyad Yoga Satria Putra Yudha Arman Yuris Sutanto Zeny Oktaviani Zeny Oktaviani Zulfian Zulfian Zulfian