Abstract：
:Scales and sludge generated during oil extraction and production can contain uranium, thorium, radium and other natural radionuclides, which can cause exposure of maintenance personnel. This work shows how the oil content can influence the results of measurements of radionuclide concentration in scale and sludge. Samples were taken from a PETROBRAS unit in Northeast Brazil. They were collected directly from the inner surface of water pipes or from barrels stored in the waste storage area of the E&P unit. The oil was separated from the solids with a Soxhlet extractor by using aguarras at 90+/-5 degrees C as solvent. Concentrations of 226Ra and 228Ra in the samples were determined before and after oil extraction by using an HPGe gamma spectrometric system. The results showed an increase in the radionuclide concentration in the solid (dry) phase, indicating that the above radionuclides concentrate mostly in the solid material.
journal_name
J Environ Radioactjournal_title
Journal of environmental radioactivityauthors
Paranhos Gazineu MH,de Araújo AA,Brandão YB,Hazin CA,de O Godoy JMdoi
10.1016/j.jenvrad.2004.11.003subject
Has Abstractpub_date
2005-01-01 00:00:00pages
47-54issue
1eissn
0265-931Xissn
1879-1700pii
S0265-931X(05)00002-0journal_volume
81pub_type
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
doi：10.1016/j.jenvrad.2013.03.004
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
doi：10.1016/j.jenvrad.2007.11.019
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
doi：10.1016/s0265-931x(03)00104-8
更新日期：2003-01-01 00:00:00
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
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更新日期：2005-01-01 00:00:00
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journal_title：Journal of environmental radioactivity
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journal_title：Journal of environmental radioactivity
pub_type： 杂志文章
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更新日期：2016-09-01 00:00:00
abstract：:Most models for transfers of radionuclides through the food chain typically assume that the radioactivity is initially deposited in chemically available forms. It is known, however, that releases of radionuclides in the form of hot particles may significantly influence their environmental transfers and uptake to the f...
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