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Tri Kusmita
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Gedung Penelitian, Fakultas Teknik, Universitas Bangka Belitung Jl. Kampus Peradaban, Merawang, Bangka 33172, Kep. Bangka Belitung, Indonesia
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Jurnal Riset Fisika Indonesia
Published by Universitas Bangka Belitung
ISSN : 27761460     EISSN : 27976513     DOI : https://doi.org/10.33019/jrfi.v1i2
Core Subject : Science,
Astronomy Computer Science & IT Earth & Planetary Sciences Materials Science & Nanotechnology Physics
The Jurnal Riset Fisika Indonesia (JRFI) (e-ISSN: 2797-6513; p-ISSN: 2776-1460) is an open access and peer-reviewed journal, published by Department of Physics - Universitas Bangka Belitung, which is a dissemination medium for research result from scientists, engineers, and practitioners in many fields of physics. JRFI is a biannual journal issued on December and June. The editors welcome submissions of papers describing recent theoretical and experimental research related to: (1) Theoretical articles; (2) Empirical studies; (3) Practice-oriented papers; (4) Case studies; (5) Review of papers, books, and resources. Focus and scope for JRFI as follows: Theoretical physics Computational physics Material physics Geophysics Instrumentation Applied physics
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 121 Documents
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Perangkat Penyimpanan Muatan Listrik Ramah Lingkungan Berbasis Karbon Aktif Dari Limbah Hasil Pengolahan Muntok White Pipper Ipi, Ipi; Safitri, Aisyah Deri Ayu Tungga; Febriani, Yunita; Kurniawan, Widodo Budi; Megiyo, Megiyo
Jurnal Riset Fisika Indonesia Vol 2 No 1 (2021): Desember 2021
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v2i1.3017

Abstract

The national need for advanced materials is spread across several fields, such as industry, transportation, information systems and military defense systems. In the field of transportation, the government continues to innovate by shifting fuel-based vehicles (BBM) towards environmentally friendly cars in the form of electric cars. However, the main challenges in developing this electric car are the electric energy charge storage system which is durable, has high storage capacity, and short charging time. In this study, carbon was activated gradually using a 7% H3PO4 solution followed by heating at a temperature of 700oC for 3 hours under nitrogen gas (N2). The results of the FTIR analysis showed that the activated carbon N2 gas had a strong and sharp C=C group along the absorption band 1500 cm-1 – 1400 cm-1 which indicated that the activated carbon had high quality and purity. This result was strengthened based on the EDS spectra which showed a carbon content of 90.56%. In addition, based on SEM micrographs, it can be observed that the morphology of the carbon produced has pores scattered on the surface. The presence of these pores will provide space for the transfer of charge or ions to the electrode. The best electrode was obtained on activated carbon with N2 gas activation treatment with a conductivity of 3.92 x 10-2 S/m and a capacitance of 1.44 x 10-3 F, so it was concluded that activated carbon muntok white paper can be used as an electric charge storage material.
Algoritma Differential Evolution untuk Estimasi Parameter Sumber Anomali Self-Potential Laby, Dharma Arung; Huda, A. M. Miftahul
Jurnal Riset Fisika Indonesia Vol 2 No 2 (2022): Juni 2022
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v2i2.3095

Abstract

Self-Potential (SP) anomaly is naturally occurring potential differences due to electrochemical, electro-kinetic, and thermoelectric sources in the subsurface. The Source of SP anomaly can be modeled as a simple-geometry body, e.g: spheres, cylinders, and inclined sheets. The model parameter of SP anomaly is generally estimated using local optimization such as gradient-search-based methods. However, these methods have some drawbacks. Therefore, this problem needs to address using global optimization, namely Differential Evolution (DE) algorithm. DE is one of the metaheuristic algorithms adopting biological evolution in the optimization process. In this work, the DE algorithm is implemented to estimate the parameters of SP anomaly sources. There are two stages in this work, e.g: synthetic test and field data inversion. In the synthetic test, DE is built and implemented in synthetic data generated from a cylinder body contaminated by noise. This test shows that DE can estimate the parameters of the cylinder body (SP anomaly source) well. In the field data inversion, DE is implemented to estimate the SP Surda anomaly which has been studied by other methods. The results of DE estimation are comparable to the previous studies, and able to provide uncertainty information. DE algorithm can be implemented to characterize the source of SP anomaly for futher study.
Identification of Mineralization Zones Using Geoelectrical Methods Self-Potential (Sp) in Pemali Village Bangka Regency Angrainy, Renata; Hariyono, Muhammad Budi; Mariana, Susi; Widyaningrum, Yekti
Jurnal Riset Fisika Indonesia Vol 2 No 1 (2021): Desember 2021
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v2i1.3130

Abstract

Bangka Belitung as an area that has a lot of potential natural mineral resources, especially tin minerals, this tin mineral potential can be utilized for industrial and non-industrial purposes. Utilization of these minerals can be done by way of exploration, exploration of mineral distribution can be done directly in the field using geophysical methods. In this study the method used is the geoelectric method of self-potential (Sp) fixed base configuration. Data acquisition was carried out in two research sample areas, namely, region 1 and region 2 with a distance between the porouspot electrodes as far as 5 m. Data retrieval on the rover was carried out at each point of the trajectory, three times the data was taken with an interval of 30 seconds, while the retrieval at the base in region 1 was carried out every 3 minutes while in region 2 it was carried out every 1 minute. The research is focused on identifying the distribution of mineral zones below the surface. The results of the study are in the form of a contour map that describes the distribution pattern of potential difference anomalies (Sp) and a topographical anomaly map at the research location, which will later be interpreted to determine the direction of the distribution of minerals below the surface of the study site.
Karakteristik Karbon Aktif Limbah Kulit Lada (Piper Nigrum L) sebagai Elektroda Superkapasitor Marina, Dewi; Kurniawan, Widodo Budi
Jurnal Riset Fisika Indonesia Vol 2 No 1 (2021): Desember 2021
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v2i1.3171

Abstract

Pemenuhan kebutuhan energi dibutuhkan suatu piranti penyimpan yang memiliki kapasitansi spresifik yang tinggi yaitu superkapasitor. Superkapasitor adalah perangkat penyimpan muatan yang memiliki kapasitansi spesifik yang tinggi. Dalam penelitian ini telah dilakukan preparasi dan karakterisasi karbon aktif dari limbah kulit lada sebagai bahan elektroda superkapasitor. Karbon diaktivasi dengan variasi aktivator NaOH 1 M, 3 M dan 5 M dilanjutkan dengan pemanasan pada suhu 700˚ C selama 3 jam dengan dialiri gas nitrogen (N2). Karbon selanjutnya dikarakterisasi menggunakan Scanning Electron Miscroscopy-Energy Dispersive Spektroscopy (SEM-EDS), Brunauer-Emmett-Teller (BET) dan pengukuran kapasitansi menggunakan metode Cyclic Voltametry (CV). Hasil pengujian menunjukkan karbon aktif limbah kulit lada berpori dengan bentuk pori bulat pada sampel 3 M dan 5 M, sedangkan pada 1 M terdapat pori berongga yang pipih dan panjang. Hasil EDS setiap sampel memiliki kandungan unsur karbon (C) secara berurut yaitu 77,57%, 75,96%, dan 74,62%. Hasil BET menunjukkan luas permukaan maksimum sebesar 149,319 m2/g. Kapasitansi elektroda superkapastitor tertinggi diperoleh pada konsentrasi 5 M dengan laju scan 1 mV/s yaitu 12,68 F/g.
Identifikasi Sebaran Air Lindi (Leachate) Menggunakan Metode Geolistrik Self-Potential (SP) Di Tempat Pembuangan Akhir (TPA) Parit Enam Kota Pangkalpinang Padilah, Hoirotul; Widyaningrum, Yekti; Kurniawan, Widodo Budi
Jurnal Riset Fisika Indonesia Vol 2 No 1 (2021): Desember 2021
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v2i1.3208

Abstract

Garbage is a common pollutant that causes various negative impacts such as lack of aesthetic value to the environment, brings various types of diseases and clogs waterways. The waste is then transported and disposed of at the TPA. The Parit Six TPA in Pangkalpinang City accommodates around 150 tons of garbage every day. This will cause contamination of water, soil and ground water by leachate seeping from the pile of garbage exposed to rain. The leachate can be identified using the Geoelectric Self Potential (SP) method using a fixed base technique with a space between the electrodes of 5 m. Then obtained the results of data acquisition from 6 paths as many as 92 points. Furthermore, the resulting data will be corrected and processed to produce isopotential contours and topography. Based on isopotential contours and topography, the distribution of fluid in the area around the Parit Enam TPA Pangkalpinang City is spread in the northeast, southwest to the north of the study area. The fluid quality around the study site is known from the results of density and pH of the sample well water. These results show the distribution of leachate in the area around the Parit Enam TPA Pangkalpinang City is spread from the northeast to the southwest in the northern part of the research area and from the southwest to the southern part of the research area towards the northern part of the research area.
Identifikasi Struktur Tektonik Sistem Geothermal Non-Vulkanik Daerah Nyelanding dan Permis Bangka Selatan Menggunakan Metode Gravity Afni, Githa Nurvilia; Kusmita, Tri
Jurnal Riset Fisika Indonesia Vol 2 No 1 (2021): Desember 2021
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v2i1.3210

Abstract

Non-volcanic geothermal is a heat system that is not related to volcanism such as in Nyelanding and Permis areas. In previous studies, hot springs in the Nyelanding area were spread from West to Northeast, with the constituent rocks of sandstone, dry gravel and granite. In the Permis area, the manifestation is influenced by shear faults trending Northwest to Southeast and the geothermal source is granite. Therefore, this study was conducted to determine the strenght of local tectonic structures using the gravity method. The data used in this study are the FAA (Free Air Anomaly) and topography data obtained through the TOPEX website. The gravity anomaly is obtained by performing spectral analysis using the Fourier Transform and moving average filter. 2D modeling is performed using inverse modeling with the smoothness constraint equation. The result of this research is that the Permis and Nyelanding geothermal systems are controlled by local tectonic structures in the Northwest and Southeast of the study area, in the form of fractures (possibly faults) with a Northeast – Southwest direction
Uji Linieritas Kalium Tiosianat (KSCN) Sebagai Indikator Kolorimetri Untuk Mendeteksi Konsentrasi Fe Pada Air Fahmi, Azrul; Kurniawan, Widodo Budi; Indriawati, Anisa
Jurnal Riset Fisika Indonesia Vol 2 No 2 (2022): Juni 2022
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v2i2.3215

Abstract

The method of testing water quality that is in great demand by researchers because it is practical and inexpensive, one of which is the colorimetric method. To detect the concentration of Fe using a colorimetric method used a colorimetric indicator such as potassium thiocyanate (KSCN). KSCN is a compound consisting of the elements potassium (K), sulfur (S), carbon (C), and nitrogen (N) which can produce an orange color when reacted with Fe. In this study, 20 variations of Fe solution were used with a concentration difference of 0.5 ppm starting from 0.5 ppm to 10 ppm and obtained a correlation coefficient of 0.9962 through the UV-Vis spectrophotometer test so that potassium thiocyanate (KSCN) can be used as a colorimetric indicator for detect the concentration of Fe in water.
Synthesis And Characterization Of Carbon-Chitosan Composite Electrodes Based On Biomass Carbon Activated Using The Microwave Method Nurdandi, Deden; Aldila, Herman; Kurniawan, Widodo Budi
Jurnal Riset Fisika Indonesia Vol 2 No 2 (2022): Juni 2022
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v2i2.3216

Abstract

English
The Effect Of Contact Time Variations On The Efficiency Value And The Adsorption Kinetic Mechanism Of Iron (Fe) On Batik Waste Cual Using Chitosan Kurniawan, Widodo Budi; Aldila, Herman; Livia, Livia
Jurnal Riset Fisika Indonesia Vol 2 No 2 (2022): Juni 2022
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v2i2.3221

Abstract

English
Studi Kinetika Pada Proses Elektrokoagulasi Zat Warna Metilen Biru Saputra, Andrian; Tiandho, Yuant; Afriani, Fitri
Jurnal Riset Fisika Indonesia Vol 3 No 1 (2022): Desember 2022
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v3i1.3230

Abstract

The main problem that is generally faced by textile industry players is related to the large amount of liquid waste produced. Liquid waste from methylene blue dye cannot be discharged directly into the water because it has a high solubility level and is non-biodegradable. Therefore, in this study, treatment of methylene blue dye waste was carried out using an easy-to-apply electrocoagulation method with a high level of efficiency for separating pollutant levels in wastewater. The next step is the decolorization of methylene blue dye waste with a given voltage variation of 20,25, and 30 volts and variations in the time used for 1,3,5,10,15,20,25, and 30 minutes. Based on the results of the study, shows that the greater the electric voltage and the longer the electrocoagulation process is carried out, the higher the decolorization value produced by the methylene blue dye waste. The results of the decolorization obtained were then continued by analyzing the reaction rate which showed a change in the concentration of methylene blue which was directly proportional to the given time. The reaction rate analysis was carried out using a reaction kinetics model, namely first order, second order, and BMG. Based on the values generated from the three reaction kinetics models, the BMG kinetic model is the best reaction kinetics model because it has a high coefficient determination (R2) of 0,999.

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