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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
Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences

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Sintesis dan karakteristik nanopartikel CaO dari cangkang kerang darah (Anadara granosa) menggunakan metode kopresipitasi Nur Hayati; Widodo Budi Kurniawan; Indah Puspita
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.
Kajian Variasi Massa Karbon Aktif dan Waktu Kontak terhadap Kinetika Adsorpsi Ion Logam Besi (Fe) pada Limbah Cair Batik Cual Rena Aprilianti; Herman Aldila; Widodo Budi Kurniawan
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.
Study of Adsorption Kinetics of Fe Metal in Batik Cual Waste using Chitosan of Rice Crab Shells Fadillah Ramadhani; Widodo Budi Kurniawan; Aldila, Herman
TIME in Physics Vol. 1 No. 2 (2023): August
Publisher : Universitas Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/timeinphys.2023.v1i2p93-100

Abstract

Chitosan from freshwater crab (Parathelphusa convexa) shell has been successfully extracted and its kinetic adsorption models for iron (Fe) metal ions in the batik cual waste solution (BCWs) were studied. Freshwater crab chitosan (FwC-Chi) was extracted via demineralization, deproteinization, decolorization, and deacetylation steps. The deacetylation degree value of FwC-Chi was 97.92% determined through FTIR spectra using the baseline method. In this study, iron metal ions distributed in the BCWs homogeneously with the concentration of iron (Fe) was 0.43 mg/L determined by atomic absorption spectroscopy (AAS). The performance of FwC-Chi adsorption on iron in the BCWs with the ratio of 1:100 (w/v) for various contact times of 30, 60, 90, 120, 150, 180, 210, and 240 minutes respectively while stirring homogeneously at room temperature. The result showed that the adsorption kinetic models for iron metal ion in the BCWs follows Behnajady-Modirshahla-Ghanbery (BMG) and pseudo-second-order kinetic model. Based on this model we found that the decrease of iron concentration is indicated by the decolorization of the waste color. It’s clear that there is a relationship between the waste color with the concentration of iron metal in the BCWs. The coefficient of decolorization decay, rate of decolorization and adsorption rate coefficient was 1,366 g-1, 16,053 g min-1, and 0,043 g mg-1 min-1 respectively achieved based on this model.
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.
Nanoencapsulation of Pelawan Stem Extract (Tristaniopsis merguensis Grifft.) Using Polycaprolactone (PCL) Mahardika, Robby Gus; Shakila, Shania; Budi Kurniawan, Widodo; Amelia, Ririn
ALKIMIA Vol 7 No 1 (2023): ALKIMIA
Publisher : SCIENCE AND TECHNOLOGY FACULTY OF UNIVERSITAS ISLAM NEGERI RADEN FATAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/wr4fqj14

Abstract

Formulation of nanoencapsulation using variations in the mass of Pelawan stem extract at (A) 0.15; (B) 0.25; and (C) 0.35 g combined with the addition of 0.5% PCL (Polycaprolactone) and Tween 80. Based on the analysis, the resulting nanocapsule sizes were 559.2, 447.2, and 297.0 nm, respectively, indicating that the nanoencapsulation of Pelawan stem extract has achieved nanoscale dimensions. The polydispersity index (PI) values for Pelawan stem extract formulas A, B, and C were 0.645, 0.687, and 0.476, respectively. Formula C has a PI value of less than 0.5, indicating that nanocapsules in formula C are more uniform. Formula C was the best formulation, with the smallest size and lowest PI. The Pelawan stem extract, rich in phenolic compounds, packaged in nanocapsule form through a simple nanoencapsulation process, holds potential as a future nutraceutical product.
2D Interpretation of Subsurface Hot Spring Geothermal Structure in Nyelanding Village Through Schlumberger Geoelectricity Configuration Method Siregar, Rahmat Nawi; Kurniawan, Widodo Budi
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 7 No 1 (2018): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v7i1.2324

Abstract

This research was done on the subsurface structure of Nyelanding village hot spring, Air Gegas district, South Bangka with coordinates 2 44’54.514” South Latitude and 106 16’6.773” East Longitude using the Schlumberger geoelectricity configuration method. Measurements were made on three different tracks. The results of the Schlumberger configuration geoelectricity measurements for the three trajectories indicate the presence of granite rock distribution with resistivity values ranging from 455 – 1046 m.
The Potential of Pepper Shell (Piper Nigrum) for Supercapacitor Electrodes Kurniawan, Widodo Budi; Indriawati, Anisa; Marina, Dewi; Taer, Erman
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 8 No 1 (2019): Jurnal Ilmiah pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v8i1.3780

Abstract

A study has been carried out on supercapacitor electrodes as an electrical energy storage media based on pepper shell activated carbon. The Synthesis is done by mixing the waste carbon pepper shell with an activator HCl with a ratio of 1 : 4. Furthermore, the activated carbon is activated physically by using a pyrolysis temperature of 600 0C. The SEM results indicate that carbon has a porous morphology with a pore size of 24.6 nm which is a mesoporous category. Electrochemical properties are analyzed using cyclic voltammetry (CV). The CV results at the scan rate of 1 mV/s indicate the specific capacitance value generated is 0.45 Fg-1. The results showed that pepper shell waste has the potential to be used as a supercapacitor electrode material
Synthesis and Characterization of Zirconium Oxychloride from Bangka and Belitung Zircon Sand Nurhadini, Nurhadini; Fabiani, Verry Andre; Ndruru, Sun Theo Constan Lotebulo; Kurniawan, Widodo Budi
Jurnal Kimia Sains dan Aplikasi Vol 28, No 7 (2025): Volume 28 Issue 7 Year 2025
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.28.7.362-367

Abstract

Although zircon sand, a byproduct of tin mining in Bangka and Belitung, is abundant and rich in zirconium content, it remains underutilized despite its potential for conversion into value-added products. This study aims to explore the feasibility of using Bangka and Belitung zircon sand as raw materials for the synthesis and characterization of zirconium oxychloride octahydrate (ZrOCl2·8H2O), and to evaluate its properties relative to a commercial reference. A hydrometallurgical process involving alkaline fusion and acid leaching was employed to convert zirconium silicate (ZrSiO4) into ZrOCl2·8H2O. Comprehensive characterization was conducted using X-ray fluorescence, X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, and particle size analysis. The results revealed that Bangka zircon sand contains a higher zirconium content (79.12%) than Belitung sand (76.97%). Both sources exhibited lower zirconium purity and higher chlorine content compared to a reference. Despite these limitations, the total Zr and Cl content reached 88.12% for the Bangka sample and 86.08% for the Belitung sample, indicating promising potential. Both products shared similar structural and morphological features in different sizes. Belitung-derived ZrOCl2·8H2O exhibited a higher ZrOCl2·8H2O phase, more defined morphology, and smaller size, suggesting it has better properties as a precursor in zirconium-based applications. This study supports the valorization of mining byproducts and highlights the potential of local zircon sand as a raw material for zirconium-based applications.
SINTESIS LOGAM BESI (Fe) BERBASIS AIR KOLONG MENGGUNAKAN METODE ELEKTROKOAGULASI Miratsi, Lizia; Yulinda, Yulinda; Junaidi, Junaidi; Kurniawan, Widodo Budi
JOURNAL ONLINE OF PHYSICS Vol. 9 No. 2 (2024): JOP (Journal Online of Physics) Vol 9 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v9i2.29203

Abstract

After a land is excavated for tin mining purposes, a hole called a kolong will be formed. Kolong has the potential to be a new water resource, but the condition of kolong water still contains dangerous metals, one of which is iron (Fe) and kolong water does not meet the standard requirements for clean water quality. Therefore, this research aims to reduce concentration of iron (Fe) and synthesizing Fe metal contained in kolong using the electrocoagulation method. This method is environmentally friendly and effective for application in kolong areas, besides that it is easy to separate pollutants because coagulated sediments called floc float on the surface. The electrocoagulation method is applied using an aluminum plate with variations in electrocoagulation time. Based on the AAS test results, it shows that there is a decrease in Fe levels in kolong water after electrocoagulation. The results of the XRF and Thus, using the electrocoagulation method can reduce levels of iron metal (Fe) and synthesize Fe metal in kolong water.
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 Erman Taer Ernidawati, Ernidawati Fadillah Ramadhani 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 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