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All Journal Jurnal Geliga Sains: Jurnal Pendidikan Fisika Jurnal Penelitian Pendidikan IPA (JPPIPA) Prosiding SNFA (Seminar Nasional Fisika dan Aplikasinya) BAREKENG: Jurnal Ilmu Matematika dan Terapan PROMINE Jambura Journal of Mathematics Kumawula: Jurnal Pengabdian Kepada Masyarakat Journal of Appropriate Technology for Community Services Stannum : Jurnal Sains dan Terapan Kimia Abimanyu: Journal of Community Engagement Inovasi Pendidikan Fisika Pekodimas : Jurnal Pengabdian Kepada Masyarakat Jurnal Riset Fisika Indonesia Dharma Pengabdian Perguruan Tinggi (DEPATI) Time in Physics: Journal for Theoretical, Instrumentation, Material-Molecular, and Education Physics
Herman Aldila
Department Of Physics, Universitas Bangka Belitung
Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Transportation Other

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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
Pembuatan Minyak Kelapa Murni (Virgin Coconut Oil) dengan Metode Fermentasi dan Optimasi Waktu Simpan dan Penjernihan Menggunakan Ekstrak Daun Lada dan Karbon Aktif Pornawati, Heni; Aldila, Herman; Aprilianti, Rena; Selviani, Dera
Jurnal Riset Fisika Indonesia Vol 3 No 2 (2023): Juni 2023
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v3i2.3555

Abstract

Coconut oil is a valuable part of the coconut fruit and is widely used as an industrial raw material or part of it is made into cooking oil. Oil extraction from coconut meat can be done in several ways. Extraction of coconut oil that is being developed at this time is the fermentation method using several enzymes or microbes, one of which can be used is yeast tempeh. This research aims to analyze the yield content and quality criteria of coconut oil made using the fermentation method and to analyze the effect of adding pepper leaf extract and activated carbon on the shelf life and clarification of coconut oil. From the results of experiments carried out in mixing tempeh yeast, the free fatty acid test, yield test, aroma test and density test were carried out. As for the test results, the determination of free fatty acids in this cooking oil study used the titration method with NaOH until the color changed to pink. For the redemption test, the highest oil concentration was 3 grams, while the tempeh yeast 4 grams and 5 grams decreased. Aroma test where in week 9 coconut oil without treatment experienced rancidity. This was caused by auto-oxidation which began to form radicals due to the presence of fat peroxidation factors. The density test is close to the SNI standard value, namely the lowest density of 0.9600 g/cm3 obtained from closed treatment with 0.5 ml of extract. This is because in this treatment very little cooking oil is contaminated with other substances.
Analisis b-value Gempabumi Menggunakan Metode Gutenberg-Richter Berdasarkan Estimasi Maximum Likelihood Di Daerah Sulawesi Utara Maulinda, Reski; Kusmita, Tri; Aldila, Herman; Triani, Triani
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.v4i2.3804

Abstract

Sulawesi is an area prone to earthquakes. This is because the Sulawesi region is flanked by three main plates, namely the Pacific Ocean plate moving westward, the Australian Continental Plate moving northward, and the Eurasian Plate moving south-southeast. This situation causes a high level of seismicity in the Sulawesi region. The Sulawesi region has a fairly complex tectonic setting so that the activity of earthquakes in the Sulawesi region is also interesting to study. The level of seismicity depends on the degree of fragility of the rock (b-value) and the distribution of earthquakes in the region. This research was conducted to determine the b-value of earthquakes in the North Sulawesi region. The method used for this research is the Gutenberg-Richter method based on the Maximum Likelihood estimation. Maximum Likelihood Estimation is a method used to statistically calculate earthquake activity parameters. The software used are ArcGIS and Microsoft Excel. The research was conducted in North Sulawesi with coordinates 118° East - 125° East 1° North Latitude - 6° South Latitude. The data used is earthquake catalog data obtained from BMKG with earthquake data for a period of 10 years (2012-2021). Based on the results of the analysis of the distribution of seismicity based on magnitude, it is more towards the Sulawesi Sea and the distribution of seismicity based on depth is shallow. The result of calculating the b-value is 0.3537 and the a-value is 3.0932. It can be concluded that the North Sulawesi region has a fairly large chance of an earthquake occurring
Pemodelan Anomali Self Potential (SP) Menggunakan Algoritma MVDE (Multi Variant Differential Evolution) Haryono, Muhammad Budi; Widyaningrum, Yekti; Aldila, Herman
Jurnal Riset Fisika Indonesia Vol 3 No 2 (2023): Juni 2023
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v3i2.4162

Abstract

Self Potential (SP) is a practical and simple geophysical method. Interpretation of the data of these methods can be done qualitatively and quantitatively. Quantitative interpretation can be done through inversion modeling, but inversion modeling often has problems with the solution of model parameters that are stuck at local minima. Therefore, in this study the MVDE (Multi Variant Differential Evolution) algorithm is used which is able to solve model parameter problems, by finding global model parameter solutions. Inversion modeling of observation Self Potential (SP) anomaly data is carried out using an algorithm that has been tested and produces a misfit of ≤10%, the test aims so that the algorithm can be used further to model observation data. The observation Self Potential (SP) anomaly modeling produces model parameter values ​​K=609.3mV D=9.3 h=3.75m q=1.51 and x=1-16, with a subsurface anomaly model in the form of a spherical geometry at depth 3.75m.
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
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.
Green Synthesis Nanopartikel Karbon Aktif dari Limbah Tempurung Kelapa Aprilianti, Rena; Selviani, Dera; Lestari, Diani; Aldila, Herman
Jurnal Riset Fisika Indonesia Vol 4 No 1 (2023): Desember 2023
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v4i1.4525

Abstract

Activated carbon from coconut shell waste is a porous solid that has a large surface area with high absorption capacity, making it an alternative for reducing levels of heavy metal ions in the air. Active carbon is made by carbonization and chemical activation, then SEM testing is carried out to see the morphology of the activated carbon and analyzed using ImageJ software. This research aims to determine the effect of chemical activation and no activation on the number of pores formed in activated carbon. From the results of research that has been carried out, there are more pores formed after carbon is activated compared to carbon without activation. This is because the carbon surface without activation is still covered by impurities. In addition, unactivated carbon and activated carbon from coconut shells have pore sizes that fall into the mesoporous category.
Pengaruh Konsentrasi H₂SO₄ pada Metode Hidrolisis Asam Sintesis Nanopartikel Selulosa Berbasis Limbah Kertas Konvensional Roehafi, Firza; Latupapua, Flourenchia Charollyne; Zundia, Zundia; Aldila, Herman
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.v5i1.5716

Abstract

Limbah kertas pada dasarnya memiliki potensi untuk dimanfaatkan sebagai sumber selulosa dengan kandungan yang cukup tinggi sebesar 64,84%. Sintesis nanopartikel selulosa dapat dilakukan dengan proses hidrolisis asam dengan menambahkan larutan H2SO4 menghasilkan nanoselulosa berukuran 150-200×10-20 nm. Penelitian ini bertujuan untuk mengetahui karakteristik nanopartikel selulosa limbah kertas terhadap pengaruh dari perlakuan variasi konsentrasi H2SO4. Variasi sampel nanopartikel selulosa terbaik menjanjikan banyak manfaat dalam perkembangan teknologi material sebagai bahan ramah lingkungan. Selulosa diekstraksi menggunakan metode delignifikasi yang kemudian dilakukan proses hidrolisis asam dengan variasi konsentrasi H2SO4 1 M, 3 M, 5 M, dan 7 M untuk mengecilkan ukuran partikel selulosa menjadi nanopartikel selulosa. Variasi sampel diuji menggunakan FTIR, PSA dan SEM untuk mengetahui kandungan serta ukuran partikel termasuk morfologi sampel nanopartikel selulosa.
PROGRAM GERAKAN PEKARANGAN PRODUKTIF BERBASIS URBAN FARMING Arsyadi, A; Aldila, Herman; Julianti, Erna; Puspita, Indah
Dharma Pengabdian Perguruan Tinggi (DEPATI) Vol 5 No 2 (2025): November 2025
Publisher : Fakultas Sains dan Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/0eb8dx40

Abstract

The household-scale microgreen urban farming program was implemented in Lubuk Kelik Village, Bangka Regency, as a community empowerment initiative to improve family income and prevent stunting. This program was designed to utilize limited household land through the cultivation of microgreens, which are easy to grow, have a short harvesting period, and provide high nutritional value. The implementation methods included socialization, technical training, cultivation practices, mentoring, and evaluation of outcomes. The results showed an increase in participants’ knowledge and skills in managing microgreens independently. Some participants consumed the harvest to improve family nutrition, while others began marketing the products within their neighborhood, contributing to additional household income. This program has proven to support the availability of affordable nutritious vegetables while also strengthening community awareness of stunting prevention. Therefore, microgreen urban farming has the potential to become an applicable and sustainable model for community empowerment.
Co-Authors Anisa Indriawati Aprilianti, Rena Arsyadi, A Asmar Asmar Atin Nuryadin Deden Nurdandi Dera Selviani Dera Selviani Desy Yuliana Dalimunthe Desy Yuliana Dalimunthe Desy Yuliana Dalimunthe, Desy Yuliana Diani Lestari Endang Setyawati Hisyam Fadillah Ramadhani Fitri Afriani Heni Pornawati Indah Puspita, Indah Indriawati, Anisa Ineu Sulistiana, Ineu Julianti, Erna Latupapua, Flourenchia Charollyne Lestari, Diani Livia Livia Luna Febriani Madewi Mulyanratna Maulinda, Reski Megiyo Megiyo Megiyo Megiyo Nurdandi, Deden Permono Adi Putro Pornawati, Heni Pririzki, Sisilia Jesika Rena Aprilianti Rena Aprilianti Reski Maulinda Rika Favoria Gusa Riko Irwanto Robby Gus Mahardika Roehafi, Firza Saputra, Darman Selviani, Dera Sito Enggiwanto Syamsiar, Syamsiar Tri Kusmita Triani Triani Triani, Triani vavionita, Fenni Verry Andre Fabiani Wahri Sunanda Widodo B. Kurniawan Widodo Budi Kurniawan Widyaningrum, Yekti Yekti Widyaningrum Yekti Widyaningrum Yuant Tiandho Zundia, Zundia