Article Per Year (5 Year)
p-Index From 2020 - 2025
1.152
P-Index
This Author published in this journals
All Journal Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Kurnia Setiawan Widana
Pusat Teknologi Bahan Galian Nuklir-BATAN
Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Materials Science & Nanotechnology Social Sciences

Published : 20 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 20 Documents
Search

 1   2 
POTENSI THORIUM DAN URANIUM DI KABUPATEN BANGKA BARAT Ngadenin, Ngadenin; Syaeful, Hery; Widana, Kurnia Setiawan; Nurdin, Muhammad
Eksplorium Buletin Pusat Teknologi Bahan Galian Nuklir Vol 35, No 2 (2014): November 2014
Publisher : Pusat Teknologi Bahan Galian Nuklir - BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (30.019 KB)

Abstract

Thorium dan uranium di Pulau Bangka terdapat di dalam mineral monasit. Secara geologi monasit terbentuk pada  granit tipe S, batupasir serta endapan aluvium.  Di daerah Bangka Barat terdapat beberapa granit tipe S dan aluvium hasil rombakannya sehingga wilayah ini dianggap sebagai wilayah potensial untuk terbentuk cebakan monasit tipe plaser. Granit tipe S dianggap sebagai sumber monasit sedangkan aluvium hasil rombakannya dianggap sebagai tempat berakumulasinya monasit. Tujuan penelitian ini adalah untuk mengetahui informasi geologi dan potensi sumber daya thorium dan uranium pada endapan aluvium di Bangka Barat. Metoda yang digunakan adalah pemetaan geologi, pengukuran kadar thorium dan uranium batuan, pengambilan sampel batuan granit untuk analisis petrografi, pengambilan sampel mineral berat pada aluvium untuk analisis butir. Hasil penelitian menunjukkan bahwa litologi di wilayah Bangka Barat tersusun oleh satuan sekis, satuan metabatupasir, terobosan granit, terobosan diabas, satuan batupasir dan aluvium. Monasit dijumpai pada terobosan granit, satuan batupasir dan aluvium. Sesar yang berkembang adalah sesar-sesar yang berarah relatif barat laut–tenggara, timur laut–barat daya dan barat–timur. Hasil analisis butiran mineral berat menunjukkan persentase monasit rata-rata dalam mineral berat adalah sebesar 6,34%. Mineral lain yang terdapat dalam cebakan plaser dan cukup potensial adalah zirkon 36,65 %, ilmenit 19,67%, dan kasiterit 14,75%.Kata kunci: endapan plaser, aluvium, thorium, uranium, granit, Bangka Barat
STUDI KEBERADAAN MINERALISASI URANIUM DI DAERAH BIAK NUMFOR, PROVINSI PAPUA BARAT Suharji, Suharji; Subiantoro, Lilik; Syaeful, Heri; Widana, Kurnia Setiawan; Prabowo, Hery
Eksplorium Buletin Pusat Teknologi Bahan Galian Nuklir Vol 35, No 2 (2014): November 2014
Publisher : Pusat Teknologi Bahan Galian Nuklir - BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (30.019 KB)

Abstract

Penelitian ini dilakukan berdasarkan adanya temuan indikasi mineral radioaktif berupa anomali laju dosis radiasi bernilai relatif tinggi. Hipotesis yang mendasari keberadaan laju dosis radiasi tinggi adalah pengendapan uranium yang berasal dari batuan basal Formasi Auwea, pengkayaan uranium yang berasal dari batugamping pada tanah permukaan, dan pengendapan uranium yang berasal dari penggunaan pupuk pertanian. Penelitian yang  dilakukan bertujuan untuk mendapatkan kesimpulan dari beberapa hipotesis tersebut. Metode penelitian yang diterapkan adalah pemetaan geologi, pengukuran radiometri, kadar uranium (U), thorium (Th), dan potassium (K) di lapangan dengan menggunakan RS 125 untuk mengetahui kadar unsur secara insitu, pengukuran radiometri pupuk tanaman, pengambilan contoh, dan analisis kadar unsur di laboratorium. Berdasarkan hasil analisis dan evaluasi data survei diketahui bahwa di daerah sekitar Maryendi, Darmapis, dan Denafi, terindikasi adanya zona anomali uranium (U) yang dicirikan oleh keberadaan tanah berwarna coklat tua – coklat kemerahan, dengan nilai dosis radiasi 1,9 sampai 4.032,3 nSv/jam dan kadar uranium (U) berkisar antara 20,27 – 325 ppm eU. Berdasarkan hasil analisis batuan sumber uranium, disimpulkan batugamping merupakan batuan sumber uranium di lokasi penelitian. Hasil pengamatan lapangan terhadap pupuk dan batuan basal Formasi Auwea tidak ditemukan anomali yang dapat mengindikasikan material/batuan tersebut bertindak sebagai sumber uranium. Kata kunci: anomali, radioaktivitas, uranium, Biak, Papua
KARAKTERISTIK UNSUR JEJAK DALAM DISKRIMINASI MAGMATISME GRANITOID PULAU BANGKA Widana, Kurnia Setiawan; Priadi, Bambang
Eksplorium Buletin Pusat Teknologi Bahan Galian Nuklir Vol 36, No 1 (2015): Vol 35, No 1 (2015): Mei 2015
Publisher : Pusat Teknologi Bahan Galian Nuklir - BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (30.019 KB)

Abstract

Geologi Pulau Bangka disusun oleh variasi granit sebagai Granitoid Klabat yang tersebar di berbagai lokasi. Unsur jejak dapat diaplikasikan dalam diskriminasi magmatisme dalam pembentukan granitoid tersebut. Tujuan penelitian ini adalah mengetahui karakteristik granitoid yang tersebar di Pulau Bangka berdasarkan geokimia unsur jejak untuk diaplikasikan dalam mempelajari magmatisme, sumber dan situasi tektoniknya. Metode analisis geokimia yang diaplikasikan dengan menggunakan Analisis Aktivasi Neutron (AAN) dan portable X-Ray Fluorescence (pXRF) untuk analisis kualitatif dan kuantitatif pada 27 sampel dari Granitoid Klabat di Pulau Bangka. Hasil penelitian ini menyimpulkan Granitoid Bangka Utara (Belinyu) dan Bangka Tengah sebagai percampuran kerak-mantel dengan afinitas Calc-Alkaline, karakteristik Tipe I sedangkan Granitoid Bangka Selatan dan Barat asal kerak dengan afinitas High-K Calc-Alkaline sebagai Tipe S. Diharapkan diskrimasi magmatisme granitoid bermanfaat dalam memberikan panduan eksplorasi bahan galian nuklir di Pulau Bangka.Kata kunci: Pulau Bangka, granitoid, unsur jejak, magmatisme, Tipe I dan S
Analytical Method Validation of Thorium in Ore Sample Using UV-Vis Spectrophotometer Indryati, Suci; Hidayat, Amalia Ekaputri; Pratama, Afiq Azfar; Laksmana, Roza Indra; Widana, Kurnia Setiawan; Ramlan, Muhammad Alif; Purwanti, Tri; Prassanti, Riesna; Anggraini, Mutia; Rommy, Rommy
EKSPLORIUM Vol 44, No 2 (2023): November 2023
Publisher : Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/eksplorium.2023.6965

Abstract

Monazite contains several rare earth elements (REE) along with radioactive elements, i.e., thorium (Th) and uranium (U). Thorium content in monazite is several times higher than uranium. Monazite contains around 12% thorium oxide, but the thorium content in this mineral varies depending on location. To determine the thorium content in monazite, an appropriate and validated analytical method is needed so that the reliability of the test results can be trusted. Apart from that, method validation is one of the clauses in SNI ISO/IEC 17025:2017 that must be fulfilled by the laboratory to be certified and produce reliable data. This research aims to validate analytical methods for non-standard and modified methods that are likely to be used outside the scope. In this research, the method used to digest and analyze thorium in mineral samples refers to the ASTM E2941-14 method with several modifications. Therefore, the analysis method needs to be validated. Validation of the analytical method is carried out by testing several parameters such as linearity and working range tests, accuracy, precision (repeatability), Limit of Detection (LOD), and Limit of Quantitation (LOQ). The results of linearity, accuracy, and repeatability tests that meet the acceptance requirements can be used as a method of validation evaluation. The results of the method validation parameter test met the acceptance requirements, with the linearity test showing a coefficient of determination (R2) of 0.997, the accuracy test showing % a recovery value of 106.22%, and the precision (repeatability) test showing %RSD of 3.76% with LOD value is 0.650 mg/L, and LOQ is 0.724 mg/L. Based on the results of these parameter tests, the method for analyzing thorium in mineral samples was validated.
Validation of The Gravimetry Method for Determining Rare Earth Elements Oxides Pratama, Afiq Azfar; Hidayat, Amalia Ekaputri; Rommy, Rommy; Indryati, Suci; Laksmana, Roza Indra; Trinopiawan, Kurnia; Purwanti, Tri; Widana, Kurnia Setiawan; Putra, Aditya Widian; Anggraini, Mutia; Nasrullah, Dzaki Hasan
EKSPLORIUM Vol 45, No 1 (2024): May 2024
Publisher : Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/eksplorium.2024.6972

Abstract

The demand for minerals to meet technological developments is increasing, including minerals that contain rare earth elements (REE). The levels of REE in solids can be determined using conventional analysis methods (gravimetry) and instruments. Even though the instrument method provides more accurate results with a small amount of analyte, the cost is higher compared to the gravimetric method, which requires more analyte and provides good results. Therefore, the gravimetric method is a solution for areas with limited instruments and budgets. The study aims to validate the gravimetric method for determining REE oxides levels, evaluate its precision and accuracy, and assess its feasibility of use. In this study, two methods were used for REE analysis: the ASTM E2941-14 method with sample weight modification and the addition of acid to increase REE oxides recovery and a precipitation method using oxalic acid. The validation stages include sample dissolution, precipitation, filtration, and ash-making. The research results show that the RSD value is 0.3154, which is smaller than 2/3 of Horwitz's CV, namely 4.1727, which means it meets the precision acceptance requirements of ISO/IEC 17025:2017. The REE oxides recovery value, which indicates accuracy, also increased to 97.74%. Therefore, the gravimetric method can be used as an alternative for determining REE oxides levels.
Studi Ekstraksi Bijih Thorit dengan Metode Digesti Asam dan Pemisahan Thorium dari Logam Tanah Jarang dengan Metode Oksidasi-Presipitasi Selektif Said, Moch Iqbal Nur; Anggraini, Mutia; Mubarok, Mohammad Zaki; Widana, Kurnia Setiawan
EKSPLORIUM Vol. 38 No. 2 (2017): NOVEMBER 2017
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2017.38.2.3930

Abstract

Thorium (Th) is a radioactive metal that can be formed along with uranumand rare earth metals (REM). Minerals contain radioactive elements are monazite ((Ce,La,Y,U/Th)PO4), thorianite ((Th,U)O2), and thorite (ThSiO4). Mamuju Area is containing radioactive minerals, thorite is one of them. To separate REM from radioactive elements can be conducted by exctracting thorium from thorite ore by acid digestion method using sulphuric acid (H2SO4), followed by leaching and thorium recovery in the form of thorium hydroxide by chemical precipitation using ammonium hydroxide (NH4OH). The experimental results showed that the optimum conditions of acid digestion that give the highest Th extraction percentage on solid to liquid ratio are obtained at 1:2 (g/mL) in 60 minutes with extraction percentages of Th, iron (Fe) and REM are 82.47%, 80.08%, and 83.31% respectively. The highest thorium precipitation percentage, as much as 95.47% , was obtained at pH 4.5 on room temperature (26 ± 1°C). At higher temperature (70°C), a lower percentage of thorium precipitation is obtained, as much as 83.69%. Pre-oxidation by using H2O2 solution with two times stoichiometry for 1.5 hours at room temperature is increasing Fe precipitation percentage from 93.08% to 99.93%.
Studi Keterdapatan Torium Pada Endapan Laterit Bauksit di Pulau Singkep Dalam Rangka Pengembangan Eksplorasi Torium di Wilayah Granit Jalur Timah Ngadenin; Widana, Kurnia Setiawan; Karunianto, Adhika Junara
EKSPLORIUM Vol. 39 No. 1 (2018): MEI 2018
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2018.39.1.4258

Abstract

The thorium exploration in the last five years in the granite tin belt region is targeted at thorium availability in primary and secondary tin deposits. Singkep island is the part of granite tin belt which potential for thorium occurences either primer or secondary deposits. The purpose of this study was to determine the characteristics of thorium availability in bauxite laterite deposits concerning thorium content and its relation to the availability of radioactive minerals and cerium (Ce), lanthanum (La), Yttrium (Y), and zircon (Zr) contents on the bauxite laterite deposit. The data obtained from this study will be used as an evaluation material for the development of thorium exploration in bauxite laterite deposits in Indonesia. The methods used are geological mapping, thorium concentration measurements, and sampling of pan concentrate for mineral grain analysis and analysis of Ce, La, Y, and Zr contens. The lithology of the study area was granite that had weathered and turned into bauxite laterite deposit with thorium content ranging from 25.9 to 177.8 ppm eTh. The concentrate of the repeating result is zircon-ilmenite concentrate with radioactive mineral content composed of zircon, monazite, and anatase. La concentration on zircon-ilmenite concentrate is 0–412 ppm, Ce is 0–80 ppm, Y is 27–82 ppm and zircon is 9,420–100,000 ppm. Avaibility of thorium at the bauxite laterite deposit on Singkep Island is closely related to the zircon, monazite, and anatase minerals. Characteristics of thorium availability in the bauxite laterite deposit are similar to the thorium characteristics of the primary and secondary tin deposits.
Penentuan Kondisi Optimum Proses Ekstraksi Uranium dan Torium dari Terak II Timah dengan Metode Pelindian Asam Sulfat dan Solvent Extraction Trioctylamine (TOA) Anggraini, Mutia; Nawawi, Fuad Wafa; Widana, Kurnia Setiawan
EKSPLORIUM Vol. 40 No. 1 (2019): MEI 2019
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2019.40.1.5378

Abstract

Tin slag II is a by-product of the second stage of tin smelting. The tin slag II contains high economic value elements in the form of radioactive elements (uranium and thorium) and rare earth elements. These elements can be utilized if they are separated from each other. The process of separating radioactive elements and rare earth elements has been carried out by leaching sulfuric acid method. The results of this process are residue containing rare earth elements and filtrates containing radioactive elements in the form of uranium and thorium sulfate. Research related to the separation of uranium and thorium sulfate in tin slag processing is only slightly published. This paper aims to determine the effectiveness of the uranium and thorium separating process by the solvent extraction method using trioctylamine (TOA). The solvent extraction process is carried out by varying the concentration of TOA used, comparison of the aqueous and organic phase (A/O) and variations in extraction time. In this study, the optimum conditions for the process were obtained at 4% of TOA concentration, 1 : 1 of A/O ratio, and mixing time of aqueous and organic phase for 2 minutes. In this condition, uranium and thorium which extracted were 67% and 0.84% respectively.
Pemetaan Geologi dan Identifikasi Sesar Aktif di Lokasi Calon Tapak PLTN Ketapang dan Sekitarnya, Madura Ngadenin, Ngadenin; Subiantoro, Lilik; Widana, Kurnia Setiawan; Sutriyono, Agus; Widito, P.
EKSPLORIUM Vol. 33 No. 1 (2012): MEI 2012
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2012.33.1.2835

Abstract

The result of economical study about demand of water supply and electric in Madura Island concludes that in 2016 Madura Island will need nuclear desalination plant to process sea water becomes fresh water. In order to support the installation of nuclear desalination plant, it is required site free from active fault, because active fault is mainly rejection factor criteria on site selection process. Aim of the research is to get geological information and identify of active fault in the site candidate of nuclear desalination plant at Ketapang area and its surrounding by interpretation of aerial photograph and land sat imagery, geological and structure geological mapping as well as trenching. The lithology of Ketapang (Md.01) and Sokobana (Md.02) site candidate consists of reef and chalky limestone forming undulating hills morphology. Structurally, research area forms a monocline with East-West trending axis, plunging 10o to East, the direction of strike is West-East, dip 10o - 30o to North. Geological structure analysis show that research area is free from active fault.
Identifikasi Keterdapatan Mineral Radioaktif pada Urat-Urat Magnetit di Daerah Ella Ilir, Melawi, Kalimantan Barat Ngadenin; Indrastomo, Frederikus Dian; Widodo; Widana, Kurnia Setiawan
EKSPLORIUM Vol. 40 No. 1 (2019): MEI 2019
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2019.40.1.5350

Abstract

Ella Ilir administratively located in Melawi Regency, West Kalimantan. Regional geology of Ella Ilir area is composed of metamorphic rocks in Triassic–Carboniferous age which are intruded by Jurassic and Cretaceous granitic rocks. Radioactive minerals occurences in the area are indicated by magnetite veins radioactivities on Triassic to Carboniferous metamorphic rocks whose values range from 1,000 c/s to 15,000 c/s. Goal of the study is to determine the type of ore mineral deposits and to identify the presence of radioactive mineral in magnetite veins in Ella Ilir area. The methods used are geological mapping, radioactivity measurements, analysis on uranium grades, and mineragraphy analysis of severe magnetite veins samples. Lithologies of the study area are composed by biotite quartzite, metatuff, metasilt, metapellite, biotite granite, and ryolite. The east-west sinistral fault and the north-south dextral fault are the developed fault structures in this area. Mineral composition of magnetite veins are consists of iron ore, sulfide, and radioactive minerals. Iron ore mineral consists of magnetite, hematit, and goetite. Sulfide minerals consist of pyrite, pirhotite, and molybdenite, while radioactive minerals consist of uraninite and gummite. The occurences of magnetite veins are controlled by lithology and geological structures. The magnetite veins in metasilt are thick (1.5–5 m), filled the fractures in the fault zone. Meanwhile, the magnetite veins in metapellite are thinner (milimetric–centimetric), filled the fractures that are parallel to the schistocity. The ore deposits in the study area are iron ore deposits or magnetite ore deposits formed by magmatic hydrothermal processes.
Co-Authors Adhika Junara Karunianto Agus Sutriyono Bambang Priadi Fatihah, Novita Sari Frederikus Dian Indrastomo, Frederikus Dian Heri Syaeful Hery Prabowo Hery Syaeful Hidayat, Amalia Ekaputri Indryati, Suci Kurnia Trinopiawan Laksamana, Roza Indra Laksmana, Roza Indra Lilik Subiantoro Mohammad Zaki Mubarok, Mohammad Zaki Muhammad Nurdin Mutia Anggraini Nasrullah, Dzaki Hasan Nawawi, Fuad Wafa Ngadenin Ngadenin Ngadenin Novriyanisti, Anggi P. Widito Pratama, Afiq Azfar Purwanti, Tri Putra, Aditya Widian Ramlan, Muhammad Alif Riesna Prassanti Rommy Rommy, Rommy Said, Moch Iqbal Nur Suharji Suharji Widodo Yustina Tri Handayani