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All Journal JURNAL KIMIA SAINS DAN APLIKASI Jurnal Geliga Sains: Jurnal Pendidikan Fisika Jurnal Sains Dasar JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI JOURNAL ONLINE OF PHYSICS Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Jambura Physics Journal ALKIMIA : Jurnal Ilmu Kimia dan Terapan Kumawula: Jurnal Pengabdian Kepada Masyarakat Journal of Appropriate Technology for Community Services Indonesian Review of Physics (IRiP) Jurnal Riset Fisika Indonesia Time in Physics: Journal for Theoretical, Instrumentation, Material-Molecular, and Education Physics
Widodo Budi Kurniawan
Jurusan Fisika, Universitas Bangka Belitung
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Sintesis dan karakteristik nanopartikel CaO dari cangkang kerang darah (Anadara granosa) menggunakan metode kopresipitasi Hayati, Nur; Kurniawan, Widodo Budi; Puspita, Indah
Jurnal Riset Fisika Indonesia Vol 4 No 2 (2024): Juni 2024
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v4i2.4378

Abstract

The lithium ion battery is a type of secondary battery. A good component to be used as the anode of a lithium ion battery is Li4Ti5O12 (LTO). LTO has a low conductivity value so doping is necessary. Doping particle size greatly affects the conductivity of LTO. The purpose of this doping was carried out to find out how the effect of CaO nanoparticle doping on the conductivity value of the LTO battery anode using the coprecipitation method by varying the molarity of NaOH, namely 1M, 3M and 7M. Based on the results of research on the influence of NaOH molarity, it produces different sizes of nanoparticles. The smallest nanoparticle size was obtained in the 3M sample variation, which was 175.0 nm. With a purity of CaO nanoparticles of 96.35%. While the conductivity value of the lithium ion battery doped with CaO nanoparticles with three variations of NaOH molarity, the optimum value was obtained in the 1M sample, which was 1.06 × 10-6 S/cm. This is because the 1M variation produces very low impurities compared to the 3M and 7M variations which have more impurities, this can affect the conductivity value.
Pengaruh Temperatur Aktivasi Karbon Aktif Terhadap Adsorpsi Logam Besi (Fe) Pada Limbah Batik Cair Batik Cual Pornawati, Heni; Aldila, Herman; Kurniawan, Widodo Budi
Jurnal Riset Fisika Indonesia Vol 5 No 1 (2024): Desember 2024
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v5i1.4414

Abstract

Batik cual waste is a problem that is quite dangerous if it is disposed of directly into the environment because it contains various kinds of heavy metals such as iron Fe. To overcome the problem by utilizing coconut shell as activated carbon. In this study, the activated carbon used was the result of chemical activation and physical activation processes using temperatures of , and . Based on the SEM results to determine the sphericity value for a temperature of is worth 0.47 for is worth 0.56 and for is worth 0.52. The value of the pore diameter of activated carbon at temperatures of , and is 40.11µm, 81.84µm and 55.50µm. The BET results for activated carbon have a total pore volume for temperatures of , and with values of 0.182 cc/g, 0.2315 cc/g and 0.1605 cc/g. To decadarize cual batik wastewater through the adsorption process, temperatures of , and were used with contact times of 0, 40, 80, 120 and 160 minutes. The adsorption results were carried out by kinetic modeling using first-order, second-order and BMG kinetic models. Based on the model that is most suitable for the adsorption of liquid batik wastewater is BMG
Penerapan Metode Elektrokoagulasi Dalam Peningkatan Kualitas Larutan FeCl3.6H2O Miratsi, Lizia; Kurniawan, Widodo Budi; Indriawati, Anisa
Jurnal Riset Fisika Indonesia Vol 5 No 1 (2024): Desember 2024
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v5i1.4415

Abstract

Electrocoagulation is a method that is often used to improve the quality of solutions. The electrocoagulation method has the advantages of not using chemical additives, easy and inexpensive operation, and having high efficiency in removing pollutants and contaminants. In this method, the pollutants obtained are easy to separate because of the floating surface of coagulated sediments called flocs. The solution used is FeCl3.6H2O solution as a source of iron content and a replacement medium for water or solutions containing iron. The iron content in water is more dominant than other heavy metals, whereas in excess it can cause health problems. In this study, a standard iron solution was used at 10 ppm variations using the electrocoagulation method using an aluminum plate at a voltage of 25 volts and a time of 60 minutes, and testing for pH, TDS, and UV-Vis was carried out. Obtained after the electrocoagulation process of the Fe standard solution, each concentration experienced an increase in quality, in the form of a significant decrease in Fe concentration (ppm), an increase in the pH value from 3 to 5, and a decrease in the TDS value of 80.69% -85.88%. So, the electrocoagulation method can be applied to improve the quality of a solution.
Kajian Variasi Massa Karbon Aktif dan Waktu Kontak terhadap Kinetika Adsorpsi Ion Logam Besi (Fe) pada Limbah Cair Batik Cual Aprilianti, Rena; Aldila, Herman; Kurniawan, Widodo Budi
Jurnal Riset Fisika Indonesia Vol 4 No 2 (2024): Juni 2024
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v4i2.4416

Abstract

Cual batik liquid waste discharged directly into the environment can cause environmental problems due to containing various heavy metals such as iron metal (Fe). Adsorption method is one of the efforts to reduce heavy metal content in wastewater. This study utilises activated carbon from coconut shell waste to be used as a heavy metal adsorbent. The activated carbon used is the result of physical and chemical activation processes. Based on SEM results, activated carbon has pores with a pore diameter of 81.84 µm and a surface area of 0.2315 cc/g. The adsorption process was carried out using activated activated carbon with mass variations of 0.25 grams, 1.5 grams, and 1.75 grams. Meanwhile, the contact time variations used were 0, 40, 80, 120, and 160 minutes. The results showed that the most optimum mass variation of activated carbon to absorb Fe metal was 1.5 grams with a contact time of 80 minutes which left a residual Fe metal of 0.161 ppm.
Analisis Spasial Zona Risiko Gempabumi Berdasarkan Intensitas Seismik dan Peak Ground Acceleration (PGA) di Provinsi Bengkulu Periode 2012–2021 Farika, Nurahmi; Kusmita, Tri; Kurniawan, Widodo Budi
Jurnal Riset Fisika Indonesia Vol 6 No 01: Desember 2025
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v6i01.3818

Abstract

Bengkulu Province is characterized by high seismic activity due to the influence of complex regional tectonic systems, which necessitates a comprehensive assessment of earthquake risk to support effective disaster mitigation. This study aims to delineate earthquake risk zones in Bengkulu Province based on Peak Ground Acceleration (PGA) and earthquake intensity. The analysis utilizes earthquake data recorded between 2012 and 2021 with magnitudes ≥ 3 and focal depths ranging from 0 to 100 km. Earthquake magnitudes originally reported as Mb, Mw, and Ms were converted to a uniform magnitude scale, namely surface wave magnitude (Ms). PGA values were calculated using the Gutenberg–Richter and McGuire empirical models, while earthquake intensity was estimated using an empirical relationship between surface wave magnitude and intensity. The results indicate that PGA values in Bengkulu Province range from 10 to 510 gal, with corresponding earthquake intensities varying from III to IX–X on the Modified Mercalli Intensity (MMI) scale. The highest earthquake risk is identified in Seluma Regency, whereas other regions exhibit low to moderate risk levels. The integrated spatial analysis of PGA and earthquake intensity provides a representative earthquake risk zonation that can serve as a scientific basis for earthquake mitigation planning and the implementation of seismic-resistant building design in Bengkulu Province.
The Temporal Variation b-Value Temporal Variation of b-Value in Bengkulu Province Using the Maximum Likelihood Method (Earthquake Case Study 2012-2022) Sari, Elmi Permata; Kusmita, Tri; Kurniawan, Widodo Budi
Jurnal Riset Fisika Indonesia Vol 6 No 01: Desember 2025
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v6i01.4389

Abstract

Bengkulu Province is a region of high seismicity influenced by the complex interaction between the offshore subduction zone along the western margin of Sumatra and active strike-slip fault systems on land. This study investigates the temporal variation of earthquake b-values in Bengkulu Province during the period 2012–2022 using the Maximum Likelihood approach. The analysis focuses on temporal changes in the frequency–magnitude distribution and the evolving characteristics of regional seismicity. The results show clear temporal variations in b-values, indicating changes in the frequency–magnitude distribution of earthquakes over time. Variations in the a- and b-values reflect shifts in the seismicity characteristics within the framework of Bengkulu’s active tectonic setting, particularly the interaction between the Indo-Australian–Eurasian subduction system and onshore active faults. Overall, the results demonstrate that temporal changes in b-values represent the dynamics of regional seismicity in Bengkulu within an active subduction–fault tectonic framework.
Pengaruh Konsentrasi Larutan Elektrolit NaCl Terhadap Sintesis Nanopartikel SnO2 Dari Plat Timah Menggunakan Metode Elektrokimia febrianti, eka; Kurniawan, Widodo Budi; Aldila, Herman
Jurnal Riset Fisika Indonesia Vol 6 No 01: Desember 2025
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v6i01.5193

Abstract

Nanopartikel merupakan partikel dengan ukuran nanometer, yaitu sekitar 1-100 nm. Nanopartikel SnO2 adalah partikel berukuran nano yang terbuat dari timah dioksida. SnO2 (timah dioksida) memiliki keunggulan seperti sifat optik yang baik, tidak beracun, aktivitas fotokatalitik yang baik, luas permukaan yang besar, stabilitas mekanik dan termal yang baik, stabilitas fisik dan kimia yang tinggi, kapasitas adsorpsi yang tinggi dan ramah lingkungan. Nanopartikel SnO2 dapat disintesis menggunakan metode elektrokimia. Metode elektrokimia dapat mengontrol ukuran partikel. Oleh karena itu tujuan penelitian ini adalah untuk mengetahui pengaruh konsentrasi molaritas terhadap ukuran partikel dengan memvariasikan molaritas NaCl yaitu 0,01M, 0,02M, 0,03M dan 0,04M. Berdasarkan penelitian ini pengaruh konsentrasi molaritas NaCl menghasilkan ukuran partikel SnO2 yang berbeda-beda. Ukuran nanopartikel terkecil diperoleh pada variasi 0,01M yaitu 4,08 nm. Kemurnian nanopartikel SnO2 diperoleh sebesar 97,516% dan fase kristal yang terbentuk adalah tetragonal.
Co-Authors Aisyah Deri Ayu Tungga Safitri Akbar, Jefri Amelia, Ririn Anisa Indriawati Aprilianti, Rena Arya Bagaskara Azrul Fahmi Deden Nurdandi Dewi Marina Dewi Marina Eka Febrianti Eka Febrianti, Eka Erman Taer Ernidawati, Ernidawati Fadillah Ramadhani Farika, Nurahmi Febriani, Yunita Fitri Afriani Herman Aldila Hoirotul Padilah Indah Puspita Indah Puspita, Indah Indriawati, Anisa Ipi Ipi Ipi, Ipi Jefri Akbar Junaidi Junaidi Livia Livia Lizia Miratsi Mahjur Mahjur Marhan Ebit Saputra Marina, Dewi Marlina Marlina Megawati Ayu Putri Megiyo Megiyo Megiyo, Megiyo Miratsi, Lizia Muhammad Sahroni Naila Fauza Ndruru, Sun Theo Constan Lotebulo Nur Hayati Nur Hayati Nurdandi, Deden Nurhadini Nurhadini Padilah, Hoirotul Pornawati, Heni Purwati Purwati Rena Aprilianti Rifqi Almusawi Rafsanjani Robby Gus Mahardika Safitri, Aisyah Deri Ayu Tungga Sahroni, Muhammad Sari, Elmi Permata Shakila, Shania Siregar, Rahmat Nawi Siska Oktaviani Sitti Patimah Wati Syaflita, Dina Tri Kusmita Trisakti, Yunior Verry Andre Fabiani Wati, Sitti Patimah Widyaningrum, Yekti Yekti Widyaningrum Yekti Widyaningrum Yekti Widyaningrum Yuant Tiandho Yulinda yulinda Yunior Trisakti