cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Andri Agus Rahman
Contact Email
jurnal@rmpi.brin.go.id
Phone
+6282120080815
Journal Mail Official
eksplorium@brin.go.id
Editorial Address
Gd. 720, KST BJ Habibie, Kawasan Puspiptek Serpong, Tangerang Selatan 15314
Location
Kota bandung,
Jawa barat
INDONESIA
Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Published by Badan Riset dan Inovasi Nasional
ISSN : 08541418     EISSN : 2503426X     DOI : https://doi.org/10.55981/eksplorium
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Materials Science & Nanotechnology
EKSPLORIUM is published to deliver the results of studies, research and development in the field of nuclear geology. The manuscripts are the result of study, research and development of nuclear geology with scope: geology, exploration, mining, nuclear minerals processing, safety and environment, and development of nuclear technology for the welfare.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geologi
Articles 172 Documents
 3   4   5   6   7 
Pemisahan Thorium dari Uranium pada Monasit dengan Metode Pengendapan Trinopiawan, Kurnia; Sumiarti, Sumiarti
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.2012.33.1.677

Abstract

Previous researches have obtained the monazite processing stages and resulting RE(OH)3 as a product with ± 62% of recovery, and the by products obtained in the form of a compound of thorium (Th) and Uranium (U). For further utilization, studies of U and Th separation is needed. This research is aimed to determine the optimal conditions for the separation of Th from U in monazite using the precipitation method with H2SO4 as a reagent. Stages of the process in this research consisted of grinding, decomposition, partial dissolution, total dissolution, and precipitation of Th with H2SO4. Feed solution used for precipitation is obtained from total dissolution stage with 2 different reagents are H2SO4 and HCl. Parameters of the research include the precipitating reagent (H2SO4) consumption and precipitation time. Optimal recovery results in the precipitation of sulfate feed solution are Th = 96.99% and U = 18.26% with 20 ml of H2SO4 consumption and 30 minutes of precipitation time. Optimal recovery results in the precipitation of chloride feed solution are 98.05% andU 25.03% with 20 ml of H2SO4 consumption and 30 minutes of precipitation time.
Korelasi Unsur Antara U dengan Co, Ni, Ag, Mo pada Batuan Granit dan Kuarsit di Jumbang I, Kalimantan Barat Sularto, Priyo
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.2012.33.1.2843

Abstract

Jumbang I sector is a part of the basin Kalan, West Kalimantan. As the other areas in Kalan, Jumbang I also have geochemical anomalies of uranium element in Vein of quartzite rocks at several locations, with high grade and radioactivities value between 500 c/s - 15000 c/s. Besides of the uranium element there are other elements included Co, Ni, Ag and Mo. The analysis result of 49 rock samples using Fluorimeter Jarell Ash obtained grades of U: 13 ppm - 31000 ppm and by Atomic Absorption Spectrometer obtained grades of Co : 1.5 ppm - 83.5 ppm, Ni : 15.2 ppm - 507.6 ppm, Ag: 1.2 ppm - 10.8 and Mo: 31.7 ppm - 10 738 ppm. To determine of element relationship in these rocks is using correlation method. The aim of this study is to determine of the relationship between U and Co, Ni, Ag, Mo elements. The methods of this study are statistical regression and correlation. The results of this study are obtained the correlation coefficient (R) between U – Co = 0.23, U - Ni = 12.15, U - Ag = 0.50, U - Mo = 0.86. Correlation coefficient (R) 0.86 can be interpreted as a high correlation, it means that the U element has strong associate with Mo element and weak associate with Co, Ni, Ag elements.
Prospek Thorium pada Endapan Aluvial di Daerah Koba dan Sekitarnya Ngadenin, Ngadenin; Indrastomo, Frederikus Dian; Widodo, Widodo
EKSPLORIUM Vol. 33 No. 2 (2012): NOVEMBER 2012
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2012.33.2.2658

Abstract

The objective of the present study of the thorium in placer of Koba, Central Bangka District, Bangka Belitung Province and its surrounding is to find out thorium prospect in alluvial deposits. The study method are geological and radiometrical mapping, grain counting and thorium grade analysis of pan concentrated. Result of the research reveals that lithology of the investigation area compose of metasandstone unit with radiometric value of 35 c/s - 200 c/s, granite intrusion with radiometric value of 140-550 c/s and alluvial with radiometric value of 40-300 c/s SPP2NF. Content of monazite in the pan concentrated is approximately 7.54 %, content of thorium in pan concentrated of 1410 ppm, covered alluvial deposits of about 400 kilometers square with average thickness 3.77 meters. According to the study thorium prospect in Koba area is feasible to be Based on the type of deposit (placer) which are relatively easy to be mined at low cost, high content of monazite and thorium so that the prospect thorium Koba feasible to develop.
Structural Characteristics of The Semanggol Formation Along The East-West Highway Route 67 Baling Area, Kedah, Malaysia Ulfa, Yuniarti; Hafizzy , Mohd Hafiz; Farhan, Muhammad
EKSPLORIUM Vol. 33 No. 2 (2012): NOVEMBER 2012
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2012.33.2.2659

Abstract

The amounts of structural data available from the East-West Highway Route 67 of Baling Area have been used to unravel the structural characteristics of the Semanggol Formation, which comprises black mudstone, sandstone, tuffaceous sandstone, tuff, paraconglomerate, siliceous shale and chert. The area was cut by two sets of faults trending NW-SE and NE-SW. The main fault in this area is known as Bok Bak fault that is trending NW-SE and have moderately to steeply dips (40o-88o) as compared to the conjugate faults. Two sets of folds trending NE-SW and NW-SE were also identified in this area, where most of them are symmetrical fold with gentle to open fold varies from non-plunging to nearly moderately plunging folds. Most of the faults have parallel orientation to the fold axis, indicated this pattern probably originated at the same period of deformation due to warping and uplifting.
Kajian Awal Prospek Bahan Galian Monasit di Kendawangan Kalimantan Barat Subiantoro, Lilik; Soetopo, Bambang; Haryanto, Dwi
EKSPLORIUM Vol. 33 No. 2 (2012): NOVEMBER 2012
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2012.33.2.2660

Abstract

Kendawangan areas is included in the regional geological coverage area of Ketapang that is identified have monazite deposits with radioactive minerals contain is uranium (U), thorium (Th) and rare earth element (REE). Results of grain counting analysis shows the content of the mineral monazite and zircon in heavy mineral grains reached 63% to 40% (of total grains), the analysis of rock samples contained grains of 0.11% monazite. The study was conducted on secondary data covering aspects of geology, source rock, traps and interpretation of heavy mineral distribution placer contain monazite and zircon. Objectives to be obtained is information about the character of the geology and distribution of monazite mineral resources with Thorium-contain and zircon. Source rock of monazite minerals is a granite 77-150 million age (Jurassic - Late Cretaceous), including the S type of the alkaline granites, formed in pegmatitic stage which advanced differentiated at a temperature 550-6000C. The anomalous radioactivity of Granite has a value of 400 c/s-9200 c/s with the characterized minerals are K-feldspar, quartz and plagioclase, minerals accompanying the form as thorite, monazite, zircon and alanite. Uranium range of the granitic rocks is 2.5 ppm - 64.8 ppm. The lateral distribution of alluvial deposits containing monazite placer occupy at flood plains valley between of hilly land area 225,040 Ha, obeying the distribution pattern of granitic rocks. Monazite propek area lies in the valley flood plain of the watershed at Sungai Kendawangan (107,800 Ha), Sungai Airtanah dingin (27,610 Ha), Sungai Tapah (42,010 Ha) dan Sungai Naning (45,010 Ha).The potential is area target to ore deposit prospection at the next stage field investigation.
Pendeteksian Keberadaan Struktur Sesar pada Batuan Vulkanik dengan Metode Magnetik Suntoko, Hadi; Nurdin, Muhammad; Susilo, Yarianto Sugeng Budi; Hamzah, Imam
EKSPLORIUM Vol. 33 No. 2 (2012): NOVEMBER 2012
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2012.33.2.2661

Abstract

Banten NPP site is located in Kramatwatu-Bojonegara district, Serang, it has a surface fault indication in volcanic rock it known that to Northwest-Southeast trending. Indications of the satellite imagery analysis maps confirm the straightness (lineament) at Bojonegara-1 fault. A lineament as fault structures to be necessary to prove existence of magnetic method in order to determine the continuity of Bojonegara-1 fault in the subsurface. The purpose of the study is to know the Bojonegara fault in the subsurface. Through on interpretation and analysis of the earth's magnetic field on the scale of an object to be caused a variety of sources it can be detected by intensity magnetic as a total magnetic moment of unity volume to study the condition of the deformed rocks. The study used are G856-AX Proton Magnetometer precession magnetometer (PPM) over a stretch of 300 m and 10 m intervals for the fault lineament. The measurement system uses two sensors and observations, corrected magnetic field strength is ideal as a reference for the total magnetic field anomalies. Preliminary results show that the fault lineament is indicated at the observation point with a depth to unknown so that it still need more detailed. Magnetic method is very good for an early review of fault structures with fast and simple.
Pengendapan Unsur Tanah Jarang Hasil Digesti Monasit Bangka Menggunakan Asam Sulfat Anggraini, Mutia; Sumarni, Sumarni; Sumiarti, Sumiarti; Rusyidi, Rusyidi; Waluyo, Sugeng
EKSPLORIUM Vol. 33 No. 2 (2012): NOVEMBER 2012
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2012.33.2.2662

Abstract

Rare earth elements are elements that widely used in many products. Rare earth elements nature are not found in a free state, but they are in the complex compounds, so that chemically processing is required to separate the Rare earth elements from their complex compounds. Monazite as by product of Bangka tin process contains several major elements, such as 0.298% uranium (U), 4.171% thorium (Th), 23.712% phosphat (P2O5) and 58.97% rare earth elements (REE) oxide. These elements can be individually separated through a process of precipitation stages. The separation process used in the study is the method of acid by using sulfat acid as reagen and filtrat digestion as feeds. The process of digestion dissolve the elements U, Th, RE and phosphate from the complex compound. Rare earth elements that are disolved can be separated from the complex compounds by using sulfat acid precipitation process. The objective of research is to set the optimal conditions for the Rare earth elements precipitation with sulfat acid. The result showed that the amount of sulphuric H2SO4 which added is 3.5 times volume of feed and precipitation time is 20 minutes, percentage of precipitation recovery is 61.21 % REE, 78.46 % U, and 93.56 % PO4.
Geologi dan Mineralisasi Uranium Sektor Nyaan Mahakam Hulu Kalimantan Timur Sukadana, I Gde
EKSPLORIUM Vol. 33 No. 2 (2012): NOVEMBER 2012
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2012.33.2.2663

Abstract

Nyaan Sector covered 0.5 km2 area. The aim of research is to understand the geological setting, mineralization and potency of uranium in Nyaan Sector. The research activities involved topography measurement, soil radioactivity measurement by grid of 20x20 m2, stratigraphic and detailed geological structure observation, the making of peels at any anomaly area and radioactivity anomaly area. There are 3 (three) significant radiometric anomaly locations at Nyaan Sector. They are anomaly Sungai Marta, Marta Hulu and Aloha with radiometric value ranges from 8000 c/s to > 15000 c/s with background value of 100 c/s. In these areas, the making of peels, trench and test pit were conducted by sampling mineralization using systematic channel sampling system by the sum of 15 channels sampling and 8 chieps sampling. The petrography and mineralogy analysis exhibited that mineralization of pitchblende, monazite, autunite were associated with bornite, chalcocite, chalcopyrite, lolingite, pyrite, sphalerite, ilmenite, limonite, magnetite, marchasite, rutile, malnicovite, hematite and iron oxide. Results of geochemical analysis for total uranium content in the rocks ranged between 345 to 11.425 ppm of uranium.
Pendugaan Potensi Volume Akuifer Menggunakan Metode Geolistrik di Pulau Gili Ketapang, Probolinggo, Jawa Timur Pryambodo, Dino Gunawan; Prihantono, Joko
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.2019.40.1.5415

Abstract

Geoelectric measurement using Schlumberger configuration was carried out in Gili Ketapang Island, a small island with a population density of 12,356 people/km2. The measurement conducted at 8 locations using a vertical electrical sounding (VES) method. The result of geoelectric data processing shows aquifer resistivity value ranging from 2.71–206 Ωm at the sandy limestone lithology. The largest aquifer volume potency based on the 2D groundwater aquifer model is in the K-03 and K-17 location. The 3D groundwater aquifer model shows that the aquifer volume is 27,689,400 m3 or about 27.689.400.000 liters. The groundwater inside the aquifer will last within 68 years in a condition where there is no population increase. Besides, the groundwater also lasts even there is no water addition inside the aquifer, by natural or artificial
Pemisahan Cerium dari Logam Tanah Jarang Hidroksida Melalui Kalsinasi dan Pelindian Menggunakan HNO3 Encer Trinopiawan, Kurnia; Purwani, Maria Veronica; Anggraini, Mutia; Prassanti, Riesna
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.2019.40.1.5411

Abstract

Application of Rare Earth Elements (REE) uses broadly in various fields related to modernization. It causes many companies are developing processing techniques to extract REE from rare earth mineral deposits. REE hydroxide processing into cerium oxide, lanthanum oxide, and neodymium concentrates has conducted by PSTA-BATAN in collaboration with PTBGN-BATAN. The previous economic study issued in excessive ammonia caused by the use of concentrated nitric acid in the cerium dissolution process. Therefore, process innovation is necessary to do by calcination and leaching methods using dilute HNO3. This research aims to determine the effectiveness of the calcination and leaching process with dilute HNO3. Calcination conducted at 1000°C temperatures with the observing parameters is calcination time, HNO3 concentration, and leaching rate. The result of the study is that calcination can convert REE hydroxide into REE oxide. The longer calcination time, the easier the REE oxide formed. The three hours calcination process enhances the concentration of La, Ce, and Nd from 7.80%, 28.00%, and 15.11% to 12.69%, 45.50%, and 24.45% respectively. The kinetic reaction of the RE(OH)3 calcination reaction follows a chemical reaction process with the equation y = 0.3145x + 0.0789 and R2 = 0.9497. Then, REE oxide from calcination reacted with dilute HNO3. The higher the concentration of HNO3 at various leaching levels, the better the leaching efficiency of La and Nd while Ce is impossible to leach or the leaching efficiency is close to zero. The optimum leaching process on three levels of leaching conditions is using 1 M HNO3. The leach reaction kinetics follows the core shrinkage model of the surface chemical reaction with the equation y = 0.1732x - 0.2088 and R2 = 0.9828.

Page 5 of 18 | Total Record : 172

 3   4   5   6   7 

Filter by Year

2011 2025


Reset
Filter By Issues
All Issue Vol. 46 No. 1 (2025): MAY 2025 Vol. 45 No. 2 (2024): NOVEMBER 2024 Vol. 45 No. 1 (2024): MAY 2024 Vol. 44 No. 2 (2023): NOVEMBER 2023 Vol. 44 No. 1 (2023): MAY 2023 Vol. 43 No. 2 (2022): NOVEMBER 2022 Vol. 43 No. 1 (2022): MAY 2022 Vol. 42 No. 2 (2021): NOVEMBER 2021 Vol. 42 No. 1 (2021): MEI 2021 Vol. 41 No. 2 (2020): NOVEMBER 2020 Vol. 41 No. 1 (2020): MEI 2020 Vol. 40 No. 2 (2019): NOVEMBER 2019 Vol. 40 No. 1 (2019): MEI 2019 Vol. 39 No. 2 (2018): NOVEMBER 2018 Vol. 39 No. 1 (2018): MEI 2018 Vol. 38 No. 2 (2017): NOVEMBER 2017 Vol. 38 No. 1 (2017): MEI 2017 Vol. 37 No. 2 (2016): NOVEMBER 2016 Vol. 37 No. 1 (2016): MEI 2016 Vol. 36 No. 2 (2015): NOVEMBER 2015 Vol. 36 No. 1 (2015): MEI 2015 Vol. 35 No. 2 (2014): NOVEMBER 2014 Vol. 35 No. 1 (2014): MEI 2014 Vol. 34 No. 2 (2013): NOVEMBER 2013 Vol. 34 No. 1 (2013): MEI 2013 Vol. 33 No. 2 (2012): NOVEMBER 2012 Vol. 33 No. 1 (2012): MEI 2012 Vol. 32 No. 2 (2011): NOVEMBER 2011 Vol. 32 No. 1 (2011): MEI 2011 More Issue