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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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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.
English English Aldila, Herman
Dharma Pengabdian Perguruan Tinggi (DEPATI) Vol 3 No 2 (2023): November 2023
Publisher : Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/depati.v3i2.4543

Abstract

Green technology through the implementation of hydroponic-based urban farming as an icon for the Surya Timur sub-district in the Kepulauan Bangka Belitung Province can become a brand awareness activity in order to promote and increase competitiveness so that it becomes a productive area after massive tin mining activities in the area. This activity began with coordination with the Village Head and Chair of the Surya Timur’s PKK in order to ensure readiness to implement the program as driving cadres. Apart from that, this activity involves hydroponic practitioners as assistants in managing hydroponic activities which include sowing, planting, caring for, and harvesting hydroponic commodities. It is hoped that optimizing the sub-district website can become an effective promotional medium in documenting these activities so that they can become a superior profile and be widely known by the public. This is expected to increase the opportunity to obtain competitive grants that can be used to improve the infrastructure of this area to become more productive and free from dependence on tin mining activities which have the potential to damage the area in the future.
English English Puspita, Indah; Aldila, Herman
Dharma Pengabdian Perguruan Tinggi (DEPATI) Vol 3 No 2 (2023): November 2023
Publisher : Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/depati.v3i2.4544

Abstract

Kelurahan Lubuk Kelik is one of the new sub-districts which is the result of the expansion of Kelurahan Parit Padang in Province of Kepulauan Bangka Belitung, the majority of which is a post-tin mining area and conservation forest area. The issue of waste is the main environmental problem faced. Along the Lubuk Kelik road, which stretches for 12 km, there are at least 10-15 illegal waste dumping points located along the road in the oil palm plantation area and residents' land. The Various efforts to educate awareness of waste management was done but that does not cause environmental problems, including throwing rubbish in its place or making recycled crafts using plastic waste. The low direct impact felt sometimes makes this education less effective, especially as handicraft products based on recycled plastic waste are less popular with the market due to the lack of innovation and creativity. The training to empower PKK and housewives through the application of hydroponic technology using plastic bottle waste is expected to be an alternative solution to the household scale plastic bottle waste problem in the Kelurahan Lubuk Kelik. This activity is an effort to handle plastic bottle waste through a recycling use method based on community empowerment, especially housewives in terms of meeting their daily need for vegetables. This was chosen because vegetables are a basic need for society and are now quite expensive. Apart from that, hydroponic technology is more efficient than conventional vegetable plantations because it does not depend on soil fertility and land area and is free of pesticides. Apart from fulfilling daily needs, it is hoped that the community will be able to develop vegetables into superior commodities as additional income for the community.
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
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.
Pengaruh Pemberian Tugas Terstruktur dalam Model Pembelajaran Kooperatif Tipe STAD ‎Terhadap Hasil Belajar Siswa pada Materi Fluida Statis di Kelas XI IPA SMA Negeri 1 Maospati Aldila, Herman; Mulyanratna, Madewi
IPF: Inovasi Pendidikan Fisika Vol. 2 No. 2 (2013): Vol. 2 No. 2 Tahun 2013
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian ini bertujuan untuk mengkaji hubungan antara metode pemberian tugas terstruktur terhadap hasil belajar siswa. Metode pemberian tugas terstruktur merupakan metode dimana guru memberikan penugasan yang waktunya telah ditentukan oleh guru dan guru membahas tuntas tugas tersebut secara klasikal. Populasi dari penelitian ini adalah siswa kelas XI dan sample dari penelitian ini adalah siswa kelas XI IPA 5 di SMA Negeri 1 Maospati. Desain penelitian yang digunakan adalah The One Group Pretest-Posttest Design. Berdasarkan hasil penelitan dengan menggunakan analisis korelasi dan regresi didapatkan koefisien korelasi dan persamaan regresi untuk masing-masing ranah hasil belajar siswa yaitu ranah kognitif dengan koefisien korelasi sebesar 0,798 dengan persamaan regresi Yˆ=21,134+0,904X, ranah psikomotor dengan koefisien korelasi sebesar 0,791 dengan persamaan regresi Yˆ=24,048+0,798X, dan ranah afektif dengan koefisien korelasi sebesar 0,783 dengan persamaan regresi Yˆ=24,931+0,767X. Berdasarkan hasil analisis dapat disimpulkan bahwa, metode pemberian tugas terstruktur terhadap hasil belajar siswa memiliki pengaruh yang positip dan korelasi yang kuat. Hal ini menandakan bahwa perubahan dari penerapan metode pemberian tugas terstruktur berpengaruh signifikan terhadap hasil belajar siswa.
Simulasi Mikromagnetik untuk Menganalisis Dampak Bentuk Geometri terhadap Sifat Magnetik Material Permalloy vavionita, Fenni; Indriawati, Anisa; Aldila, Herman
Jurnal Riset Fisika Indonesia Vol 5 No 2 (2025): Juni
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v5i2.5430

Abstract

The development of ferromagnetic material technology is currently experiencing very rapid progress in various fields. One of the technological developments in the field of developing ferromagnetic materials based on thin layers of soft magnetic properties is used in the manufacture of recording heads, Magnetic Tunnel Junction (MTJ) contained in Magnetoresistive Random Access Memory (MRAM) and various sensors. One example of a ferromagnetic material with softmagnetic properties is permalloy. Permalloy has high permeability and a magnetic moment configuration that is easily controlled with small changes in the magnetic field. The advantage of permalloy is that apart from its high permeability, it also has low coercivity, resistance to oxidation, and significant anisotropic magnetoresistance. Therefore, in this research micromagnetic simulations have been carried out for thin layers using permalloy material. This research was carried out using the OOMMF (Object Oriented Micromagnetic Framework) software simulation to obtain the influence of the shape of the permalloy material on the magnitude of the magnetization value, coercivity value and anisotropy energy value produced due to the influence of an external magnetic field. The research results show that the shift in the magnetic wall domain in this study produces different magnetization values ​​in each form of permalloy material, the difference in shape also affects the field coercivity value and the anisotropy energy value. This can be seen when the external magnetic field applied is 5000 Oe, the magnetization value in form 1 is 0.99997, with a coercivity field of 680 Oe and an anisotropy energy value of 5.72 × 10-28, for form 2 it has a magnetization value of 0, 9806628, with a coercivity field of 1240 Oe and an anisotropy energy value of 3.55 × 10-25, and form 3 has a magnetization value of 0.942093 with a coercivity field of 960 Oe and an anisotropy energy value of 1.00 × 10-25. An increasing magnetization value indicates that the material is saturated, and the resulting anisotropy energy value becomes smaller.
PROJECTION OF THE INFLATION RATE IN PANGKALPINANG CITY USING THE AUTOREGRESSIVE MOVING AVERAGE (ARMA) Dalimunthe, Desy Yuliana; Sulistiana, Ineu; Saputra, Darman; Aldila, Herman; Pririzki, Sisilia Jesika
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 17 No 3 (2023): BAREKENG: Journal of Mathematics and Its Applications
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/barekengvol17iss3pp1513-1520

Abstract

Inflation is one of the variables in the macro economy that can affect people's welfare and is defined as a complex phenomenon due to general and continuous price increases. This study aims to project the inflation rate in Pangkalpinang City, Bangka Belitung Islands Province in the period of October, November, and December of 2022. The historical inflation data used in this study is presented in a monthly period from January 2004 ends in October 2022 and January 2023 obtained from the publication of the Central Statistics Agency (BPS) of the Bangka Belitung Islands Province. The process projection is done using the Autoregressive Integrated Moving Average (ARIMA) model after passing the model fitting process first. The projection results obtained using historical inflation data show that the ARIMA model that is suitable for the projection process is the ARMA model (4,4) with the best RMSE value of 1.21 and MAE of 0.89. Through the results of this projection, it is also obtained that the percentage value of the inflation rate in Pangkalpinang City has decreased by 0.03% in the period of October 2022 and has increased in the period of November by 0.05%, then the inflation rate in Pangkalpinang City will again decline in the period of December 2022. by 0.3% and an increase of 0.33% in January 2023.
Purification and Characterization of Monazite from Bangka using Mechanical-Magnetic Separation Method Aldila, Herman; Indriawati, Anisa; Putro, Permono Adi
Jurnal Penelitian Pendidikan IPA Vol 10 No 5 (2024): May
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i5.6644

Abstract

In this research, the purification and characteristics of monazite, a by-product of the tin ore enrichment process. Monazite is given pre-treatment to monazite sand using the mechanical-magnetic separation method to increase the content of rare earth metal elements. Based on the results of the analysis of monazite samples from Tin mine tailings concentrate that has been purified, the dominant elements of the highest rare earth metals are cerium (Ce), lanthanum (La), neodymium (Nd), and Yttrium (Y). The mechanical-magnetic separation method, monazite from Tin mine tailings concentrate can have higher purity. These rare earth metal elements can be further extracted or synthesized; and used as supporting or even main materials in developing advanced technological industries.
Pengaruh Konsentrasi NaOH pada Proses Deasetilasi Kitin terhadap Derajat Deasetilasi Kitosan Aldila, Herman; Nuryadin, Atin; Dalimunthe, Desy Yuliana
Jurnal Riset Fisika Indonesia Vol 1 No 2 (2021): Juni 2021
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v1i2.2017

Abstract

Chitosan have been successfully produced from the dried shrimp home industry waste (Bangka, Indonesia). Extraction of chitosan was carried out in four steps: deproteinization, demineralization, decolorization and deacetylation of chitin. The effect of NaOH concentration on deacetylation process was studied. The results shown that the increase of NaOH concentration from 20% to 60%, the chitosan DD increased. The diffusion rate of OH- causes increment of OH- attack to the amino group thus realizing the effective deacetylation of chitin. The highest chitosan DD was up to 69.49% is achieved under the optimized conditions of this process and the occurrence of deacetylation structurally demonstrated by the Fourier transform infrared (FTIR) characterization.
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