Natural radioactivity measurement and radiological hazard evaluation in surface soils in a gold mining area and surrounding regions in Bolikhamxay province, Laos

2020 ◽  
Vol 326 (2) ◽  
pp. 997-1007
Author(s):  
Somsavath Leuangtakoun ◽  
Giang T. T. Phan ◽  
Thang Duc Duong ◽  
Ngoc-Thiem Le ◽  
Nam Khang Khong ◽  
...  
Keyword(s):  
Natural Radioactivity ◽  
Gold Mining ◽  
Mining Area ◽  
Hazard Evaluation ◽  
Radioactivity Measurement ◽  
Radiological Hazard ◽  
Surface Soils

scholarly journals Radiological Hazard Evaluation of Some Egyptian Magmatic Rocks Used as Ornamental Stone: Petrography and Natural Radioactivity

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7290
Author(s):  
El Saeed R. Lasheen ◽  
Mohammed A. Rashwan ◽  
Hamid Osman ◽  
Sultan Alamri ◽  
Mayeen U. Khandaker ◽  
...  
Keyword(s):  
Natural Radioactivity ◽  
Residential Buildings ◽  
Granitic Rocks ◽  
Hazard Evaluation ◽  
Gamma Ray Spectrometry ◽  
Radiological Hazard ◽  
Absorbed Dose Rate ◽  
Ornamental Stone ◽  
Magmatic Rocks ◽  
Ornamental Stones

Magmatic rocks represent one of the most significant rocks due to their abundance, durability and appearance; they can be used as ornamental stones in the construction of dwellings. The current study is concerned with the detailed petrography and natural radioactivity of seven magmatic rocks. All are commercial granitic rocks and are identified as black Aswan, Nero Aswan, white Halayeb, Karnak, Verdi, red Hurghada and red Aswan. Their respective mineralogical compositions are classified as porpheritic granodiorite, granodiorite, tonalite, monzogranite, syenogranite, monzogranite and syenogranite. A total of nineteen samples were prepared from these seven rock types in order to assess their suitability as ornamental stones. Concentrations of 226Ra, 232Th and 40K radionuclides were measured using NaI (Tl) scintillation gamma-ray spectrometry. Among the studied magmatic rocks, white Halayeb had the lowest average values of 226Ra (15.7 Bq/kg), 232Th (4.71 Bq/kg) and 40K (~292 Bq/kg), all below the UNSCEAR reported average world values or recommended reference limits. In contrast, the other granitic rocks have higher values than the recommended limit. Except for the absorbed dose rate, other radiological hazard parameters including radium equivalent activity, annual effective dose equivalent, external, and internal hazard indices reflect that the White Halyeb rocks are favorable for use as ornamental stone in the construction of luxurious and high-demand residential buildings.

scholarly journals Long-range effect of cyanide on mercury methylation in a gold mining area in southern Ecuador

2011 ◽  
Vol 409 (23) ◽  
pp. 5026-5033 ◽  
Author(s):  
Jean Remy Davée Guimaraes ◽  
Oscar Betancourt ◽  
Marcio Rodrigues Miranda ◽  
Ramiro Barriga ◽  
Edwin Cueva ◽  
...  
Keyword(s):  
Long Range ◽  
Gold Mining ◽  
Mining Area ◽  
Mercury Methylation ◽  
Range Effect ◽  
Southern Ecuador

Distribution of total mercury and methylmercury around the small-scale gold mining area along the Cikaniki River, Bogor, Indonesia

2016 ◽  
Vol 24 (3) ◽  
pp. 2643-2652 ◽  
Author(s):  
Takashi Tomiyasu ◽  
Hitoshi Kodamatani ◽  
Yuriko Kono Hamada ◽  
Akito Matsuyama ◽  
Ryusuke Imura ◽  
...  
Keyword(s):  
Gold Mining ◽  
Total Mercury ◽  
Mining Area ◽  
Small Scale

scholarly journals Heavy Metal Pollution in Surface Water of Linglong Gold Mining Area, China

2011 ◽  
Vol 10 ◽  
pp. 914-917 ◽  
Author(s):  
Liang Ning ◽  
Yang Liyuan ◽  
Dai Jirui ◽  
Pang Xugui
Keyword(s):  
Heavy Metal ◽  
Surface Water ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Gold Mining ◽  
Mining Area
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