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All Journal POSITRON JURNAL FISIKA Jurnal Fisika FLUX Science and Technology Indonesia Jurnal Pengabdian UntukMu NegeRI Jurnal Penelitian Sains Indonesian Journal of Chemistry IJEMS (Indonesian Journal of Environmental Management and Sustainability) Riau Journal of Empowerment Jurnal Pengabdian Masyarakat Teknik
Idha Royani
Jurusan Fisika, Universitas Sriwijaya
Religion Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences

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Studi Pengembangan Sistem Pengukuran Photoluminescence Menggunakan Detektor CCD Idha Royani; Fiber Monado
Jurnal Penelitian Sains No 7 (2000)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5016.073 KB) | DOI: 10.56064/jps.v0i7.321

Abstract

Telah dilakukan studi awal pengembangan sistem pengukuran photoluminescence menggunakan detektor CCD. Di sini dibuat suatu rangkaian yang menghubungkan CCD ini ke perangkat lainnya seperti pulsa generator dan power supply serta menyusun perangkat lunak sehingga detektor ini dapat berfungsi sebagai sensor cahaya. Untuk menguji kebenaran kinerja dari sistem digunakan Light Emitting Diode (LED) sebagai sumber cahaya, juga digunakan detektor PMT sebagai pembanding. Dan ternyata hadilnya menunjukkan kesesuaian, jadi dapat disimpulkan bahwa sistem telah bekerja dengan baik.
Desain Konseptual Reaktor Cepat Berpendingin Karbondioksida dan Berbahan Bakar Uranium Alam Dengan Daya 2400 MW Enda Susanty; Menik Ariani; Idha Royani; Zaki Su'ud; Fiber Monado
Jurnal Fisika FLUX Vol 17, No 2 (2020): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1145.824 KB) | DOI: 10.20527/flux.v1i1.7184

Abstract

This paper presents the design concept of a carbon dioxide-cooled fast reactor.  This reactor utilize U-10%Zr as fuel and SS316 as cladding.  The strategy of modified CANDLE (Constant Axial shape of Neutron flux, nuclide densities and power shape During Life of Energy production) was applied for burnup in the core with power 2400 MW. The reactor core calculations were performed with a cylindrical geometry that is varied on the height and diameter of the core using a set of CITATION and PIJ modules on the SRAC (Standard Reactor Analysis Code) program. The ideal core size was obtained with a high of 350 cm, and a diameter of 240 cm with the resulting survey parameter are effective multiplication factor(keff), excess reactivity, radial and axial power distribution, and power peaking. The reactor core reaches a critical condition with keff 1.05 and excess reactivity 5.3% and radial power peaking 1.73. Optimization was done with power flattening, that is by dividing the core into two parts with a fuel fraction of 60% for the inner part with thick of 80 cm and fuel fraction of 65% for the outer part with thick of 40 cm, the results are 1.013, 1.3% and 1.5 for keff, excess reactivity, and radial power peaking, respectively.
Analisis Jumlah Rongga Tercetak pada Ion Imprinted Polymer (IIPs)-Fe(III) Yang disintesis menggunakan Metode Cooling-heating Hesti Dwi Kartika; Jorena Jorena; Fiber Monado; Idha Royani
Jurnal Penelitian Sains Vol 24, No 1 (2022)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (335.806 KB) | DOI: 10.56064/jps.v24i1.680

Abstract

Polimer Fe(III) berbasis Ion Imprinted Polymers atau yang disebut IIPs-Fe (III) telah berhasil disintesis menggunakan metode cooling-heating dengan asam metakrilat (MAA) sebagai monomer fungsi, etilen glikoldimetakrilat (EDGMA) sebagai pengikat silang, benzoil peroksida (BPO) sebagai inisiator, dan acetonitril sebagai pelarut. NIP (Non Imprinted Polymer) juga disintesis tanpa menggunakan zat aktif Fe(III) yang berfungsi sebagai polimer pembanding. Polimer Fe(III) yang dihasilkan selanjutnya digerus dan diekstraksi dengan menggunakan etanol (8,5 mL), air deionisasi (15 mL), dan HCl (8 mL; 1 M) untuk memisahkan ion Fe (III) dari polimer. Setelah diekstraksi kemudian hasilnya dikarakterisasi menggunakan FTIR, XRD dan SEM. Hasil FTIR menunjukkan adanya gugus fungsi khas pada setiap ikatan atom yang menjadi penyusun pada polimer IIPs-Fe(III). Berdasarkan hasil FTIR, terjadi perubahan % transmitansi pada polimer sebelum dan setelah ekstraksi, yaitu untuk gugus C=O nilai % transmitansi berubah dari 75% menjadi 82,5%, gugus C-H dari 94% menjadi 95%, gugus C-O dari 74% menjadi 75%, dan gugus C=N dari 92,5% menjadi 95%. Hal ini menunjukkan bahwa ion Fe(III) telah berkurang dari IIPs-Fe(III) akibat proses ektraksi. Hasil XRD menunjukkan bahwa nilai FWHM sedikit turun dari 1,911 nm menjadi 1,910 nm. Hal ini menunjukkan tidak terjadi perubahan yang signifikan pada ukuran kristalitnya. Sedangkan dari analisis SEM diperoleh informasi bahwa jumlah rongga yang tercipta pada IIPs-Fe (III) untuk ukuran <100nm sebanyak 237 rongga.
Sosialisasi Aplikasi Pupuk Nanomagnetik Pasir Besi Pada Tanaman Jagung di Desa Pulau Semambu Ogan Ilir Sumatera Selatan Sebagai Integrasi Penelitian dan Perkuliahan Arsyad, Fitri Suryani; Setiabudidaya, Dedi; Ariani, Menik; Royani, Idha; Supu, Amiruddin; Mohadi, Risfidian; Lesbani, Aldes; Farma, Rakhmawati; Soerya, Balada; Nur’aini, Siti; Liasari, Beta Riana
Riau Journal of Empowerment Vol 7 No 2 (2024)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/raje.7.2.156-167

Abstract

Socialization activities have been carried out regarding the application of iron sand nanomagnetic fertilizer (Fe3O4) on corn plants to the villagers of Pulau Semambu Ogan Ilir, South Sumatra. This community service activity is part of the integration of the research results that have been carried out. From the results of the study, it was found that at the same growing age, corn added with nano-magnetic iron sand, both simaxx + nanomagnetic iron sand and silica + nanomagnetic iron sand, had a faster growth of about 100 cm compared to corn that was only given simaxx fertilizer. which is about 45-50 cm. Research results and observational data were then collected and analyzed to evaluate the effectiveness of using Fe3O4 nanomagnetic fertilizer on corn plants. Apart from being disseminated to corn farmers, research results are also used as teaching material to be conveyed to students in material physics courses. Integrating research results with community service activities and material physics lectures has increased the practical use of research results and provided wider benefits for society and students.
Studi Awal Pengaruh Kloroform Sebagai Pelarut Pada Proses Ekstraksi Molecularly Imprinted Polymer (MIP) Nano Kafein Maimuna, Maimuna; monado, fiber; Royani, Idha
Jurnal Fisika Vol 10, No 1 (2020)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v10i1.23806

Abstract

Proses ekstraksi sangat penting dalam sintesis Molecularly Imprinted Polymer (MIP). Proses tersebut sangat menentukan jumlah kafein yang terbuang. Keberhasilan proses ini tidak hanya bergantung pada proses sintesis namun juga tergantung pada ukuran partikel templat dan pelarut yang digunakan saat proses tersebut. Sintesis polimer nano kafein telah berhasil dibuat menggunakan metode cooling-heating melibatkan MAA sebagai monomer fungsional, EDMA sebagai ikatan silang, BPO sebagai inisiator, dan kloroform sebagai pelarut. NIP juga dibuat sebagai polimer pembanding tanpa nano kafein. Serbuk nano polimer yang dihasilkan selanjutnya diekstraksi menggunakan kloroform, metanol/asam asetat (1:20), dan metanol. Terakhir polimer dicuci menggunakan metanol/aquabidest (1:20). Hasil FTIR menunjukkan adanya gugus fungsi amina yang merupakan gugus fungsi khas kafein. Nilai persentase transmitansi pada MIP nano kafein lebih besar dibandingkan polimer nano kafein. Hal ini menunjukkan bahwa proses ekstraksi templat nano kafein menggunakan larutan kloroform berhasil dilakukan. Hasil XRD menunjukkan MIP memiliki ukuran kristal yang lebih besar dibandingkan NIP. Ukuran kristal yang besar terlihat dari tingginya puncak intensitas yang dihasilkan.
High Performance of Ni-Al/magnetite Biochar for Methyl Orange Removal in Aqueous Solution Palapa, Neza Rahayu; Zahara, Zaqiya Artha; Mohadi, Risfidian; Royani, Idha; Lesbani, Aldes
Science and Technology Indonesia Vol. 9 No. 1 (2024): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.1.156-166

Abstract

Elevated concentrations of dyes in water have a significant impact on both the aquatic ecosystem and human well-being. The adsorption approach, which is cost-effective and simple to use, was chosen for color treatment. The adsorbents used in this study were Modified Layered Double Hydroxides (LDHs) and Magnetite Biochar (MBC). To prepare the Ni-Al/MBC composites, a technique called coprecipitation and hydrothermal was employed. The successful preparation of these composites was confirmed through the use of characterization tests including X-Ray Diffraction (XRD), Fourier Transform – Infra Red (FT-IR), Brunauer Emmet Teller (BET), and Vibrating Sample Magnometer (VSM). The study focused on analyzing the kinetics, isotherms, and thermodynamics of adsorption in order to anticipate the mechanism of Methyl Orange (MO) adsorption. Additionally, the regeneration process was investigated to assess the adsorbent's ability for repeated usage. The percentage of Ni-Al/MBC adsorbed during the first to fifth regeneration cycles was 86.940%, 82.545%, 70.752%, 56.244%, and 34.503% respectively. The duration of contact was 70 minutes, as determined by the Pseudo Second Order (PSO) equation, with an adsorption rate of 0.0030 g/mg.min. The Langmuir equation indicated a maximum adsorption capacity of 45.455 mg/g.
Synthesis of Ion Imprinted Polymers (IIPs) Adsorbent Materials Using Fe(III) Leaching Process with Variation of Hydrochloric Acid Solvent Concentration and Heat Treatment Royani, Idha; Maimunah; Edianta, Jaya; Alfikro, Ihsan; Fiber Monado; Jorena; Satya, Octavianus Cakra; Virgo, Frinsyah
Science and Technology Indonesia Vol. 9 No. 2 (2024): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.2.336-344

Abstract

Fe(III)-IIPs material was prepared using a cooling-heating method with different leaching variations. The synthesis process used several chemical components, including EGDMA, MAA, and BPO as the crosslinker, functional monomer, and initiator. This study focused on the template formation process of IIPs with leaching variations, using parameters such as molarity concentration, solution mixture, and temperature to influence the amount of template formed in the polymer body. The spectra of XRD showed a widening value of FWHM as higher molarity was applied during the leaching process, with the widest one at 0.163 rad for IIPs 3 M. Fe(III) peak is located at 680-610 cm−1 or 1386-1350 cm−1 within the unleached sample, according to FTIR spectra. It also can be traced at minimum intensity in leached samples. SEM data processing showed that higher concentrations were essential in releasing Fe(III) ions from the polymer body. Meanwhile, heat treatment did not strongly impact the template formation sites of IIPs. Synthesized Fe(III)-IIPs materials had adsorption capacity, optimum time, and efficiency of 9.35 mg.g−1, 40 minutes, and 93.48%, respectively. Based on the results, Fe(III)-IIPs materials had great potential as adsorbents for removing metal pollutants from water.
The Effect of Burnable Poison Np-237 on the Conceptual Design of the GFR-2400 MWt Using MCANDLE Burnup Strategy Monado, Fiber; Berliani, Berliani; Supardi, Supardi; Royani, Idha; Ariani, Menik; Kaban, Hadir; Su'ud, Zaki
POSITRON Vol 14, No 1 (2024): Vol. 14 No. 1 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/positron.v14i1.65433

Abstract

This study was used to design the Gas-cooled Fast Reactor (GFR) with 2400 MWt power as well as to implement a modified CANDLE (MCANDLE) burning strategy. Metallic uranium with Neptunium-237 at a concentration of 1% to 10% was used as burnable poison in the fuel while helium was applied as a coolant. Neptunium has been produced in conventional reactors by the decay product of plutonium obtained from U-238. This isotope has a relatively high absorption cross-section. As a nuclear waste, it is very useful to utilize as a burnable poison to reduce waste in the future and extend reactor operation lifetime with negligible reactivity. Moreover, the reactor was designed to operate for 100 years of burnup. Nuclear Fuel cell level calculations were conducted using the PIJ module and the reactor core was analyzed using the CITATION module contained in the SRAC. The core height was found to be 420 cm while the diameter was 300 cm and it was designed to have a refueling period of ten years. The survey parameters evaluated include burnup level, factor multiplication, conversion ratio, atomic density, and power distribution. The calculation conducted at the fuel cell level showed that the maximum value in the 76th year for the infinite multiplication factor was 1.30097. It was also discovered that the reactor core for the effective multiplication factor parameter with a fuel fraction of 55% was 1.094 without the addition of burnable poison.
Optimization of Desulfurization of 4-Methyldibenzothiophene and 4,6-Dimethyldibenzothiophene Using Mg/Al Layered Double Hydroxide Equipped with ZnO/TiO2 Amri, Amri; Ahmad, Nur; Wibiyan, Sahrul; Wijaya, Alfan; Mardiyanto, Mardiyanto; Royani, Idha; Mohadi, Risfidian; Lesbani, Aldes
Indonesian Journal of Chemistry Vol 24, No 4 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.88790

Abstract

The growth of heavy industry leads to an increase in sulfur dioxide emissions, impacting health, economy, and the fulfilment of the ecological needs for society. Sulfur removal is carried out using the oxidative desulfurization (ODS) method. In this study, layered double hydroxide materials of Mg/Al, Mg/Al-TiO2, and Mg/Al-ZnO were successfully synthesized and analyzed using X-ray diffraction (XRD), Fourier-transform infrared (FTIR), and scanning electron microscope-energy dispersive spectroscopy (SEM-EDS) techniques. Those materials are used as catalysts for the desulfurization of 4-methyldibenzothiophene (4-MDBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT). Composite Mg/Al catalysts with metal oxides provide superior desulfurization process efficiency and enhanced stability, making them highly effective for repeated use. The conversion percentage of desulfurization of 4-MDBT and 4,6-DMDBT increases with time. The n-hexane is a suitable solvent for desulfurization of 4-MDBT and 4,6-DMDBT. All catalysts exhibit significant heterogeneity that greatly aids in the separation process.
Synthesis and Performance of ZnAl@Layered Double Hydroxide Composites with Eucheuma cottonii for Adsorption and Regeneration of Congo Red Dye Wibiyan, Sahrul; Royani, Idha; Lesbani, Aldes
Indonesian Journal of Environmental Management and Sustainability Vol. 8 No. 3 (2024): September
Publisher : Magister Program of Material Science, Graduate School of Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijems.2024.8.3.126-134

Abstract

This study investigates the synthesis and characterization of ZnAl-layered double hydroxide (ZnAl@LDH) composites modified with Eucheuma cottonii (EC) for the adsorption and regeneration of congo red (CR) dye. The ZnAl@LDH was synthesized using a co-precipitation method, and the composite with EC was prepared via hydrothermal techniques. The structural properties of the composites were analyzed using XRD and FTIR. Adsorption experiments were conducted to determine the effects of pH, contact time, concentration, and temperature on dye removal. The adsorption kinetics followed the pseudo-second-order (PSO) model, while the isotherm data best fitted the Freundlich model, indicating multilayer adsorption. The ZnAl@EC composite demonstrated superior adsorption capacity (243.902 mg/g at 40 °C) compared to ZnAl@LDH and EC. Thermodynamic studies revealed that the adsorption process was spontaneous and endothermic for ZnAl@LDH and EC but exothermic for ZnAl@EC. The regeneration study showed that ZnAl@EC retained significant adsorption capacity even after seven cycles, indicating its potential for practical applications in wastewater treatment.
Co-Authors Aldes Lebani, Aldes Aldes Lesbani Alfahidayah, Arini Alfikro, Ihsan Alfikro, Muhammad Ihsan Almafie, Muhammad Rama Amiruddin Supu Amri Amri Arsyad, Fitri Suryani Assa'idah Assaidah, Assaidah Atina Berliani, Berliani Dedi Setiabudidaya Edianta, Jaya Enda Susanty Erry Koriyanti Fiber Monado Fitria, Silfiyana Frinsyah Virgo Hadir Kaban Hadir Kaban, Hadir Hesti Dwi Kartika Hijrah, Muhammad Husin, Sadam Ida Sriyanti Irma Suryani Ismail, Dede Ridwan Jorena Jorena Jorena, Jorena Karvenia, Icha Aulia Khairul Saleh Liasari, Beta Riana Maimuna Maimuna, Maimuna Maimunah Mardiyanto Mardiyanto Megawanto, Dian Menik Ariani Nur Ahmad, Nur Nur’aini, Siti Octavianus Cakra S. Octavianus Cakra Satya Rakhmawati Farma Risfidian Mohadi Rudy Setiawan Sari, Putri Ailana Yhawita Soerya, Balada Su'ud, Zaki Supardi Supardi Weanda, W Wibiyan, Sahrul Wijaya, Alfan Yulinar Adnan Zahara, Zaqiya Artha Zaki Su&#039;ud