Ousmane Ndour, C. Thiandoume, A. Traoré, X. Cagnat, Papa Mbaye Diouf, Maurice Ndeye, A. S. Ndao, A. Tidjani
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Determination of natural radionuclides in phosphogypsum samples from phosphoric acid production industry in Senegal
Abstract In this study, the activity concentration of natural radionuclides (238U, 226Ra, 210Pb, 232Th, and 40K) in phosphogypsum were measured using a low-background digital gamma-ray spectrometer equipped with Broad Energy Germanium (BEGe) detector. The mean activity concentrations of 238U, 226Ra, 210Pb, and 232Th were found to be 88.5 ± 19.5 Bq kg−1, 879.6 ± 20.3 Bq kg−1, 755.4 ± 17.1 Bq kg−1, 4.5 ± 0.3 Bq kg−1, and below the detection limit respectively. The estimated radium equivalent activity was found to be higher than the world recommended value of 370 Bq kg−1 but is within the recommended limit of 2220 Bq kg−1 for the use of phosphogypsum in the construction of roads, bridges, and foundations of non-residential buildings. The total annual effective doses received by workers and members of the public were found to be lower than the annual limit of 1 mSv y−1, except for the scenario of a person living in a house built with building material containing phosphogypsum.
期刊介绍：
Environmental Forensics provides a forum for scientific investigations that address environment contamination, its sources, and the historical reconstruction of its release into the environment. The context for investigations that form the published papers in the journal are often subjects to regulatory or legal proceedings, public scrutiny, and debate. In all contexts, rigorous scientific underpinnings guide the subject investigations.
Specifically, the journal is an international, quarterly, peer-reviewed publication offering scientific studies that explore or are relevant to the source, age, fate, transport, as well as human health and ecological effects of environmental contamination. Journal subject matter encompasses all aspects of contamination mentioned above within the environmental media of air, water, soil, sediments and biota. Data evaluation and analysis approaches are highlighted as well including multivariate statistical methods. Journal focus is on scientific and technical information, data, and critical analysis in the following areas:
-Contaminant Fingerprinting for source identification and/or age-dating, including (but not limited to) chemical, isotopic, chiral, mineralogical/microscopy techniques, DNA and tree-ring fingerprinting
-Specific Evaluative Techniques for source identification and/or age-dating including (but not limited to) historical document and aerial photography review, signature chemicals, atmospheric tracers and markets forensics, background concentration evaluations.
-Statistical Evaluation, Contaminant Modeling and Data Visualization
-Vapor Intrusion including delineating the source and background values of indoor air contamination
-Integrated Case Studies, employing environmental fate techniques
-Legal Considerations, including strategic considerations for environmental fate in litigation and arbitration, and regulatory statutes and actions
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