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All Journal Bulletin of Scientific Contribution : Geology Journal of Degraded and Mining Lands Management Jurnal Fisika Unand Hydrogen: Jurnal Kependidikan Kimia
Dadong Iskandar, Dadong
Pusat Teknologi Keselamatan dan Metrologi Radiasi – BATAN
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Physics

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POTENSI GEOLOGI REGIONAL KEPULAUAN BANGKA BELITUNG UNTUK TAPAK LANDFILL LIMBAH TENORM Sucipta, Sucipta; Pratama, Hendra Adhi; Iskandar, Dadong
Bulletin of Scientific Contribution Vol 18, No 3 (2020): Bulletin of Scientific Contribution : GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v18i3.31168

Abstract

Sebagai  antisipasi kebutuhan masa mendatang dalam penyediaan fasilitas pengelolaan limbah TENORM di Kepulauan Bangka Belitung (Babel), maka salah satunya perlu dipersiapkan fasilitas disposal tipe landfill yang mempertimbangkan aspek keselamatan masyarakat dan lingkungan. Untuk itu sebagai langkah awal perlu dilakukan tinjauan geologi regional Kepulauan Bangka Belitung untuk calon tapak landfill limbah TENORM. Kajian ini dilaksanakan dengan metode deskriptif dengan ruang lingkup studi pustaka, tinjauan terhadap kriteria keselamatan tapak landfill, pengumpulan dan analisis data geologi regional, serta analisis potensinya untuk tapak landfill. Berdasarkan data geologi regional diperoleh beberapa potensi calon tapak dengan batuan pengungkung (hostrock) berupa batuan sedimen (batuan lempungan), hostrock batuan kristalin (granit, granodiorit, adamelit dan lain-lain), dan hostrock batuan metamorf (filit, sekis dan lain-lain). Hostrocks tersebut tersebar di pulau Bangka, pulau Belitung dan pulau-pulau kecil di sekitar pulau Bangka dan pulau Belitung.Kata kunci : geologi regional, tapak, landfill, limbah TENORM
Screening-level assessment of radon, thoron, and gamma radiation exposure in a TENORM-impacted tin mining area, Indonesia Hikmat, Moh Cecep Cepi; Soesilo, Tri Edhi Budhi; Iskandar, Dadong; Soelarno, Soemarno Witoro; Yusuf, Muhammad; Syaeful, Heri
Journal of Degraded and Mining Lands Management Vol. 13 No. 2 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.132.9917

Abstract

Tin mining activities are frequently associated with Technologically Enhanced Naturally Occurring Radioactive Materials (TENORM), potentially increasing environmental radiation exposure. This study elucidated radon (²²²Rn), thoron (²²?Rn), and external gamma radiation in an artisanal tin-mining area in East Belitung Regency, Indonesia. Short-term measurements of radon and thoron were conducted at residential locations, while external gamma dose rates were measured at a tin-processing facility. Annual effective doses and excess lifetime cancer risks were estimated using internationally recommended parameters. Measured concentrations reflected uranium- and thorium-bearing minerals associated with granitic geology and surface disturbance typical of tin-mining regions. External gamma dose rates near ore concentrates and tailings exceeded local background levels, indicating technologically enhanced radiation fields from mineral processing. Although estimated annual effective doses remained below the recommended public limit of 1 mSv y?¹, external gamma radiation was the dominant contributor to total dose, with radon and thoron inhalation representing a secondary but significant pathway. This integrated evaluation emphasizes including thoron in radiation assessments of tin-mining areas, as radon-only assessments may underestimate inhalation exposure in thorium-rich environments. The findings provide baseline data for radiation protection strategies in artisanal mining communities and highlight the need for comprehensive TENORM monitoring in similar settings.
Penentuan Konsentrasi Radionuklida Alam Di Kawasan Terdampak Banjir Lahar Dingin Gunung Marapi Sumatera Barat Afriani, Novi; Fardela, Ramacos; Iskandar, Dadong; Kusdiana; Wahyudi
Jurnal Fisika Unand Vol 15 No 2 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.2.197-203.2026

Abstract

Research has been carried out to determine the activity concentrations of radionuclides Ra-226 (Radium-226), Th-232 (Thorium-232), and K-40 (Potassium-40) in the Bukik Batabuah area, West Sumatra. The main objective of this research was to compare radionuclide levels in soils affected by cold lava floods with those exposed only to volcanic ash, and to assess whether the cold lava flow contributed to increased radionuclide concentrations. Measurements were performed using an HPGe (High Purity Germanium) gamma spectrometer. Soil samples were collected from six locations impacted by the cold lava flow and from three locations affected by ash from the Mount Marapi eruption. The results indicated that Ra-226, Th-232, and K-40 were detected in all samples. The average activity concentrations in soil affected by the cold lava flow were 14.92 ± 0.62 Bq/kg for Ra-226, 18.37 ± 0.83 Bq/kg for Th-232, and 342.15 ± 7.85 Bq/kg for K-40. In contrast, soils not affected by the cold lava flow showed average values of 10.99 ± 0.62 Bq/kg for Ra-226, 22.34 ± 1.03 Bq/kg for Th232, and 191.68 ± 5.06 Bq/kg for K-40. A t-test statistical analysis indicated significant differences between the two groups of samples. Based on PERKA BAPETEN No. 9 of 2009, the measured activity concentrations in soils around the foothills of Mount Marapi remain below the regulatory limits established by BAPETEN.
Determination of Thorium Distribution Coefficient in Clay Soil From Bangka Belitung for Radioactive Waste Management Yana, Arya Diva; Alizar; Iskandar, Dadong; Hary Sanjaya; Efendi, Jon
Hydrogen: Jurnal Kependidikan Kimia Vol. 14 No. 2 (2026): April 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v14i2.20366

Abstract

Radioactive waste is material contaminated by radioactive substances from nuclear activities that pose a danger to the environment and health, so controlled management is required. The purpose of this study was to test the distribution coefficient value of Bangka Belitung clay as an adsorbent to absorb thorium ions. Clay is used because of its large surface area, which helps the adsorption process of metal ions. The results of the study showed that the optimum adsorption conditions were achieved within 10 minutes with an optimum concentration of 100 ppm. Meanwhile, the results of the Langmuir isotherm analysis had a larger R2 value, namely 0.94923. This indicates that the adsorption process is more suitable for the formation of a monolayer. Based on these results, clay can be used in landfill systems to reduce the risk of groundwater pollution.
Co-Authors Alizar Hary Sanjaya Hendra Adhi Pratama Heri Syaeful Hikmat, Moh Cecep Cepi Jon Efendi Kusdiana Muhammad Yusuf Novi Afriani, Novi Ramacos Fardela Soemarno Witoro Soelarno, Soemarno Witoro Soesilo, Tri Edhi Budhi Sucipta Sucipta WAHYUDI Yana, Arya Diva