Dissertations / Theses on the topic 'Radioactive pollution of water – Vermont'
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Hart, Christine. "Pharmaceutical Waste in Vermont: Results from a Survey on Purchasing, Use & Disposal." ScholarWorks @ UVM, 2018. https://scholarworks.uvm.edu/graddis/937.
Full textYang, Limin. "Stochastic modeling of water flow through a variably-saturated, heterogeneous field at Idaho National Laboratory uncertainty analysis /." Online access for everyone, 2005. http://www.dissertations.wsu.edu/Thesis/Summer2005/l%5Fyang%5F072805.pdf.
Full textIsam, Salih M. Musa. "Radon in natural waters : analytical methods, correlation to environmental parameters, radiation dose estimation, and GIS applications /." Linköping, 2003. http://www.bibl.liu.se/liupubl/disp/disp2003/med820s.pdf.
Full textConsidine, Ellen J. "Tritium transport at the Cambric site at NTS." abstract and full text PDF (free order & download UNR users only), 2005. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1433408.
Full textSalih, Isam M. Musa. "Radon in natural waters : Analytical Methods; Correlation to Environmental Parameters; Radiation Dose Estimation; and GIS Applications." Doctoral thesis, Linköpings universitet, Medicinsk radiofysik, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-5221.
Full textGuiseppe, Vincente E. "Radon in Ground Water: A Study of the Measurement and Release of Waterborne Radon and Modeling of Radon Variation in Bedrock Wells." Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/GuiseppeVE2006.pdf.
Full textRainey, Michael Patrick. "Airborne remote sensing of estuarine intertidal radionuclide concentrations." Thesis, University of Stirling, 1999. http://hdl.handle.net/1893/2275.
Full textPawlisz, Andrew V. "Internal residues of the narcotic organic chemicals in the Cladoceran, Daphnia magna." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=69519.
Full textKenna, Timothy C. "The distribution and history of nuclear weapons related contamination in sediments from the Ob River, Siberia as determined by isotopic ratios of Plutonium, Neptunium, and Cesium." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/29059.
Full textIncludes bibliographical references.
This thesis addresses the sources and transport of nuclear weapons related contamination in the Ob River region, Siberia. In addition to being one of the largest rivers flowing into the Arctic Ocean, the bulk of the former Soviet Union's nuclear fuel reprocessing and weapons testing facilities (i.e. Mayak, Tomsk-7, and Semipalitinsk) are located within the Ob drainage basin. The atom ratios 240Pu/239Pu, 237Np/239Pu, and 137Cs/240Pu, measured by magnetic-sector ICP-MS, are used to distinguish between contamination derived from global fallout and contamination derived from local sources. Deposition chronologies estimated for sediment cores are used to construct a record of weapons related contamination at the sites sampled. Contaminant records indicate that in addition to debris from atmospheric weapons tests, materials derived from local sources have also played a role in nuclear weapons related contamination of the Ob region. Isotopic data presented in this study clearly demonstrate that non-fallout contamination has been transported the full length of the Tobol, Irtysh, and Ob Rivers (i.e. the tributaries draining Mayak, Semipalitinsk, and Tomsk-7, respectively). In several instances, unique isotopic compositions are observed in sediments collected from tributaries draining each of the suspected non-fallout sources. In such cases, these materials and their deposition ages have been used to link contamination in the Ob delta to Mayak, Tomsk-7, or Semipalitinsk. Linear transport rate estimates (km yr-1) indicate that contaminated sediments transit between source tributaries and the Ob delta on time-scales of [less than or equal to] l year.
(cont.) These estimates suggest that a catastrophic release of contamination due to dam failure at one of the many reservoirs located at both Mayak and Tomsk-7 that contain high levels of radioactive waste would result in measurable levels of contamination in the delta within as little as 1 year. Isotopic concentrations in sequentially extracted sediments containing weapons related contamination reveal that the majority of plutonium and neptunium (80 to 90 percent) behaves in a similar fashion regardless of the source and is removed by treating the sediments with citrate-dithionite. This indicates that plutonium and neptunium are not truly refractory and likely associate with redox sensitive sedimentary components. Isotopic ratios measured in extracted fractions suggest that only a minor fraction of contamination is associated with acid leachable or acid digestible sedimentary phases.
by Timothy Cope Kenna.
Ph.D.
Cédat, Bruno. "Evaluation du procédé UV/H2O2 pour la désinfection et l’élimination des micropolluants en vue d’une réutilisation des eaux usées traitées en petites stations d’épuration." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI117/document.
Full textWater scarcity is a growing concern worldwide. In this context, treated wastewater is seen as a sustainable water resource which could be used for different purposes such as irrigation, groundwater recharge or industrial activities. Reclaimed water is an environmentally and economically solution, still poorly developed in France. However, an increasing demand is expected in the coming years. Therefore, treatment enhancement in wastewater treatment plant could be necessary in order to meet chemical and biological water quality requirements which will depend on the final use of the treated water. The treatment of emerging micropollutants is one of the new challenge WTP will have to cope with. Enhanced treatment processes (ozonation, activated carbon, membrane filtration) have already been set up in large WTP but small and medium WTP, representing around 90% of the French WTP, are still lacking of affordable treatment solutions. However, UV based advanced oxidation process (AOP) could be a promising technology in order to produce a water of high quality. The aim of this study is to demonstrate that UV/H2O2 process is technically and economically efficient for the disinfection and the removal of micropollutants in small and medium WTP. First of all, a UV/H2O2 pilot at a laboratory scale was assessed on bacterial models as well as estrogenic micropollutants (E1, E2 and EE2) in treated wastewater. Treatment efficiency was compared to UV photolysis. It was shown that UV/H2O2 treatment increased the disinfection process by destroying the cellular membrane integrity whereas the UV photolysis could only inactive the bacteria. Moreover, when combining UV (plus petit 600 mJ/cm²) and H2O2 (30-50 mg/L), above 80% of the estrogenic compounds and the associated estrogenic activity could be removed. No high estrogenic or toxic by-products were detected by the two bioassays used in this study (YES and vibrio fisheri). The UV/H2O2 process could also degrade pharmaceuticals such as diclofenac, ibuprofen and naproxen (>70 % at 1000 mJ/cm²). In a second part, a full scale pilot was designed based on the previous results and set up in a WTP in Vercia (Jura). The treatment (UV fluence ≈ 1000 mJ/cm², [H2O2] = 15 mg/L) allowed to obtain a water of a very high bacteriological and chemical quality. The global cost of the process was estimated at around 0.28 €/m³. This study demonstrates the efficiency of the UV/H2O2 process in a small WTP and its high potential for reclaimed water production
TOMINAGA, FLAVIO K. "Efeito da irradiação na toxicidade de fármacos em solução aquosa: cloridrato de fluoxetina, diclofenaco de sódio e mistura de ambos." reponame:Repositório Institucional do IPEN, 2016. http://repositorio.ipen.br:8080/xmlui/handle/123456789/26825.
Full textMade available in DSpace on 2016-11-11T16:56:25Z (GMT). No. of bitstreams: 0
As evidências da contaminação das águas por resíduos de medicamentos e seus subprodutos levou esse grupo de resíduos a compor a lista de poluentes orgânicos emergentes, como consequência da expansão do uso de medicamentos, como o antidepressivo cloridrato de fluoxetina e o anti-inflamatório diclofenaco. Diversos Processos Oxidativos Avançados vêm sendo aplicados para a degradação destes compostos. Dentre eles, o processo de irradiação com feixe elétrons obteve bons resultados na remoção de toxicidade e degradação de fármacos. O presente estudo consistiu em aplicar radiação ionizante como uma possível tecnologia para degradar os fármacos em águas. A irradiação de solução aquosa contendo os fármacos foi aplicada usando acelerador de elétrons, cuja eficiência foi discutida mediante análises químicas (Cromatografia Líquida Ultra Rápida e Carbono Orgânico Total (COT)), ecotoxicológicas (ensaios de toxicidade com Vibrio fischeri e Daphnia similis) e biológicas (Ensaios Respirométricos). Os resultados de COT indicaram mineralização não significativa dos compostos, mesmo sendo observada degradação máxima de 99,9% para o diclofenaco e 55% para o cloridrato de fluoxetina na mistura (1:1) em 5.0 kGy. Foi observada toxicidade aguda dos fármacos, sendo mais acentuada para a fluoxetina, seguido do diclofenaco e, finalmente, da mistura para V. fischeri. Quando D. similis foram empregadas nessa avaliação, a ordem de toxicidade foi de fluoxetina, a mistura de ambos os medicamentos e do diclofenaco. Além disso, foi observada remoção de toxicidade nas amostras irradiadas em todas as doses aplicadas para a bactéria V. fischeri, com maior eficiência de remoção de toxicidade de 55%, em 5 kGy, na mistura dos dois fármacos. Para a D. similis, foi observada remoção significativa de toxicidade da mistura apenas na dose 2,5 kGy. Os ensaios respiroétricos não indicaram biodegradabilidade após o tratamento.
Dissertação (Mestrado em Tecnologia Nuclear)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
Martin, Paul Craig. "Radiological impact assessment of uranium mining and milling." Thesis, Queensland University of Technology, 2000.
Find full textBrannan, C. Thomas. "An investigation of radioactively contaminated wastewater reclamation plant biosolids." Thesis, 1996. http://hdl.handle.net/1957/34249.
Full textGeier, Joel E. "Groundwater flow and radionuclide transport in fault zones in granitic rock." Thesis, 2004. http://hdl.handle.net/1957/29561.
Full textGraduation date: 2005
Hay, Tristan Ryan. "Medical radionuclides and their impurities in wastewater." Thesis, 2012. http://hdl.handle.net/1957/29342.
Full textGraduation date: 2012
Access restricted to the OSU Community at author's request from May 24, 2012 - May 24, 2014