کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1738999 1016827 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Uranium and thorium in soils, mineral sands, water and food samples in a tin mining area in Nigeria with elevated activity
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
پیش نمایش صفحه اول مقاله
Uranium and thorium in soils, mineral sands, water and food samples in a tin mining area in Nigeria with elevated activity
چکیده انگلیسی

The activity concentrations of uranium and thorium have been determined in soils and mineral sands from the Nigerian tin mining area of Bisichi, located in the Jos Plateau, and from two control areas in Nigeria (Jos City and Akure) using high-purity germanium detectors (HPGe). High resolution sector field inductively coupled plasma mass spectroscopy (HR-SF-ICP-MS) was used to determine uranium and thorium in liquids and foodstuffs consumed locally in the mining area. The activities of uranium and thorium measured in the soils and mineral sands from Bisichi ranged from 8.7 kBq kg−1 to 51 kBq kg−1 for 238U and from 16.8 kBq kg−1 to 98 kBq kg−1 for 232Th, respectively. These values were significantly higher than those in the control areas of Jos City and Akure and than the reference values reported in the literature. They even exceeded the concentrations reported for areas of high natural radioactive background. Radionuclide concentrations in samples of the local foodstuffs and in water samples collected in Bisichi were found to be higher than UNSCEAR reference values. The results reveal the pollution potential of the mining activities on the surrounding areas.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Radioactivity - Volume 100, Issue 3, March 2009, Pages 232–240
نویسندگان
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