Browsing by Subject "Radium"
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Item Determination of petroleum pipe scale solubility in simulated lung fluid(Texas A&M University, 2005-08-29) Cezeaux, Jason RoderickNaturally occurring radioactive material (NORM) exists in connate waters and, under the right conditions during oil drilling, can plate out on the interior surfaces of oil and gas industry equipment. Once deposited, this material is commonly referred to as ??scale.?? This thesis is concerned with the presence of 226Ra in scale deposited on the inner surfaces of oil drilling pipes and the internal dose consequences of inhalation of that scale once released. In the process of normal operation, barium sulfate scale with a radium component adheres to the inside of downhole tubulars in oil fields. When crude flow is diminished below acceptable operational requirements, the pipe is sent to a descaling operation to be cleaned, most likely by a method known as rattling. The rattling process generates dust. This research investigated the chemical composition of that aerosol and measured the solubility of pipe scale from three oilfield formations. Using standard in-vitro dissolution experimental equipment and methods, pipe scale is introduced into simulated lung fluid over a two-week period. These samples are analyzed using quadrupole inductively coupled plasma mass spectrometry (Q-ICP-MS), known for very low detection limits. Analysis reveals virtually no 226Ra present in the lung fluid exposed to pipe scale. Sample measurements were compared against background measurements using Student??s t test, which revealed that nearly all the samples were statistically insignificant in comparison to the lung fluid blanks. This statistical test proves within a 95% confidence interval that there is no 226Ra present in the lung fluid samples. These results indicate that inhaled NORM pipe scale should be classified as Class S and serve to further confirm the extreme insolubility of petroleum pipe scale. For dose calculations, the S classification means that the lung is the main organ of concern. Radium-226 from petroleum pipe scale does not solubilize in the interstitial lung fluid, and does not, therefore, enter the bloodstream via respiratory pathways. Since there is no removal by dissolution, the 500 day biological half-life implied by the S classification is based solely on the mechanical transport of 226Ra out of the lungs by phagocytosis or the mucociliary escalator.Item Substance of the sun : the cultural history of radium medicines in America(2010-08) Holmes, Robert Wendell, 1980-; Oshinsky, David M., 1944-; Hunt, Bruce J.; Kraut, Alan M.; Meikle, Jeffrey L.; Stoff, Michael B.From the moment Marie Curie announced the existence of radium, the strange new element captured the imagination of the American public. Radium, it seemed, could do anything. It gave off its own light and heat and appeared to realize the ancient alchemical dream of transmutation. It also showed promise as a medicine. The press ran with the idea that radium was a panacea that would cure everything from cancer to wife-beating. Soon it became impossible for the public to know what to believe when it came to radium and its effects on the body. Patent medicine companies exploited the murkiness surrounding ideas about radium, marketing a slew of products that claimed to harness the element’s healing and energizing powers. Meanwhile, physicians made slow, careful progress in defining the parameters of radium therapy, narrowing their focus to cancer. The popularity of radium patent medicines peaked in the 1920’s when hundreds of thousands of Americans purchased one or more of the dozens of radium products that proliferated at the time. Government regulators and members of the medical establishment sought to push these products from the market, but loopholes in the regulatory apparatus created under the Pure Food and Drug Act of 1906 allowed many of these companies to operate freely. Two scandals—the saga of the “Radium Girls” and the death of Eben Byers, a well-known industrialist who died after drinking over 1000 bottles of a radioactive tonic called Radithor—damaged radium’s image in the 1920’s and 1930’s. By the late 1930’s, strengthened regulatory laws helped push radioactive products from the marketplace. During World War II, scientists discovered artificial isotopes that proved more effective and less expensive than radium in the treatment of disease. For decades Americans had struggled to make sense of a scientific discovery that seemed to challenge fundamental ideas about the nature of the body and its relationship to the physical world. The ambiguities surrounding the element posed a unique challenge to progressive ideals of expertise and professionalization while providing a malleable image of energy and health that a variety of commercial interests could deploy.