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Pyrolyse de divers brais utilisés dans la technologie söderberg et analyse des matières volatiles /Bouchard, Nathalie, January 1998 (has links)
Maîtrise (M.Eng.)--Université du Québec à Chicoutimi, 1998. / Document électronique également accessible en format PDF. CaQCU
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Using remotely sensed imagery to identify parking lot sealant surface types /Rao, Mohan. January 1900 (has links)
Thesis (M.S.)--Texas State University--San Marcos, 2009. / Vita. Includes bibliographical references (leaves 52-54). Also available on microfilm.
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Modeling atmospheric vegetation uptake of PBDEs and PAHs using field measurements.St-Amand, Annick D. Unknown Date (has links)
Thesis (Ph.D.)--University of Ottawa, 2008. / Includes bibliographies. Also available via the World Wide Web.
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Modeling atmospheric vegetation uptake of PBDEs and PAHs using field measurementsSt-Amand, Annick D. Unknown Date (has links)
Thesis (Ph.D.)--University of Ottawa, 2008. / Includes bibliographies.
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Environmental chemistry of the chlorobiphenyls in the Milwaukee RiverVeith, Gilman D. January 1970 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1970. / Typescript. Vita. Description based on print version record. Includes bibliographical references (leaves 173-180).
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Determination of degradative gene frequencies applications in polycyclic aromatic hydrocarbon contaminated sediments /Mumy, Karen Lynn. January 2004 (has links)
Thesis (Ph. D.)--Miami University, Dept. of Microbiology, 2004. / Title from second page of PDF document. Includes bibliographical references (p. 133-140).
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Denaturing gradient gel electrophoresis characterisation of microbial communities in polycyclic aromatic hydrocarbon and polychlorinated biphenyl contaminated soil [electronic resource] /Surridge, Angela Karen Joanna. January 2007 (has links)
Thesis (Ph. D.)(Microbiology)--University of Pretoria, 2007. / Includes bibliographical references. Available on the Internet via the World Wide Web.
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The Use of Semipermeable Membrane Devices (SPMDS) for Monitoring Dioxin Levels in Maine RiversLake, Bjorn Anders January 2003 (has links) (PDF)
No description available.
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Desenvolvimento e validacao de metodologia analitica para determinacao de hidrocarbonetos policiclicos aromaticos (HPAS) em sedimentos. Avaliacao da represa do Parque Pedroso, Santo Andre, SP / Development and validation of analytical methodology for determination of polycyclic aromatic hydrocarbons (PAHS) in sediments. Assessment of Pedroso Park dam, Santo Andre, SPBRITO, CARLOS F. de 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:27:05Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T13:56:15Z (GMT). No. of bitstreams: 0 / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
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Contaminant issues in production and application of biocharBuss, Wolfram January 2016 (has links)
For widespread use of biochar in agriculture and horticulture, it must be ensured that application will neither adversely affect soil and plants, nor exceed legislated contaminant concentrations. The most relevant groups of contaminants in biochar are potentially toxic elements (PTEs), polycyclic aromatic hydrocarbons (PAHs) and volatile organic compounds (VOC). In this thesis, the concentrations of these groups of contaminants were analysed in 90 different biochars produced by slow pyrolysis. Subsequently, the concentrations were compared to legislation/guideline threshold values and linked to production conditions. The risk these contaminants pose to plant growth was also assessed, to give recommendations on production of safe biochar. PTEs can neither be formed nor destroyed, which means their presence in biochar is predominantly determined by feedstock type. However, significant levels of Cr, Fe and Ni were introduced into biochar from the furnace steel, whilst PTEs with low boiling points, such as As, Cd and Zn, partially evaporated during pyrolysis. PTEs were not responsible for phytotoxic effects observed for PTE-rich biochars despite biochar’s exceedance of available and total PTE threshold values for soil and soil amendments. Although initial tests were promising, the risk that PTE-rich biochars as amendment for soil and growing media pose, needs further investigation. The PAH concentration in biochar was markedly reduced by increasing carrier gas flow rate, and the type of feedstock also influenced the PAH content. However, there was no clear dependence of pyrolysis temperature on PAH concentrations, which was attributed to PAHs being increasingly formed and evaporated at higher pyrolysis temperatures. Ultimately, condensation of pyrolysis vapours and deposition on biochar was identified as the main risk for biochar contamination with PAHs, as this resulted in elevated concentrations of high-risk, higher molecular weight PAHs. Weaknesses in the pyrolysis unit design, such as cold zones, resulted in elevated concentrations of VOCs, as well as PAHs, in biochar. Comparing concentrations and phytotoxic potential of both compound groups, it was concluded that observed toxic effects were much more likely caused by VOCs in biochars containing both contaminants. Overall, formation of VOCs and PAHs cannot be prevented, but their presence in biochar resulting from retention and deposition can be minimised.
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