Orientador: Marcelo Loureiro Garcia / Resumo: Com a crescente produção de etanol no Brasil, houve o aumento da geração da vinhaça, que em certas condições pode ser utilizada para a fertirrigação de lavouras de cana-de-açúcar com o intuito de elevar a fertilidade do solo. A pesquisa consistiu na análise temporal e espacial de dados das características químicas e físicas dos solos de uma lavoura de cana-de-açúcar e da vinhaça aplicada, além da análise granulométrica, química e mineralógica de seis amostras de solo coletadas na área de estudo. A partir dos resultados obtidos, observou-se que elevados volumes de vinhaça foram calculados em 2014, sendo que os resultados indicaram baixas condições de fertilidade com altas concentrações de H+Al e de CTC total. A análise temporal de uma das glebas da fazenda demonstrou que, em dosagens previamente calculadas, a aplicação de vinhaça pode melhorar a fertilidade do solo e promover a redução da acidez e da toxicidade por alumínio. As análises granulométricas, químicas e mineralógicas caracterizaram o latossolo vermelho da área de estudo como um solo arenoso muito fino a médio com altas concentrações de silicatos e óxidos e hidróxidos de ferro e alumínio com minerais de gibbsita, hematita, quartzo e argilominerais do grupo da caulinita. O estudo avaliou a possibilidade de lixiviação dos cátions de base e de concentração de íons H+ e Al3+ pela hidrólise total e parcial da caulinita e da gibbsita e da decomposição da Matéria Orgânica no período chuvoso, sendo que a fertirrigação repõe ... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: As the ethanol production has been developing in Brazil, it resulted on the increase of vinasse generation, which under certain conditions can be used for fertirrigation of sugarcane plantations in order to increase soil fertility. The research consisted of temporal and spatial data analysis of chemical and physical characteristics of soils of the soils of a sugar cane yield and the applied vinasse, in addition to the granulometric, chemical and mineralogical analysis of six soil samples collected in the research area. From the results obtained, it was observed that high volumes of vinasse were calculated in 2014, as the results had also indicated low fertility conditions with high concentrations of H+Al and total CEC. The temporal analysis of the plot 15 demonstrated that, in controlled doses, the application of vinasse can improve soil fertility and promote reduction of acidity and toxicity by aluminum. The granulometric, chemical and mineralogical analyzes characterize the red latosol of the research area as a very fine to medium sandy soil with high concentrations of silicates and oxides and hydroxides of iron and aluminum with minerals of gibbsite, hematite, quartz and clay minerals of the kaolinite group. The research evaluated the possibility of leaching of base cations and concentration of H+ and Al3+ ions by total and partial hydrolysis of kaolinite and decomposition of Organic Matter (OM) in rainy season, with soil moisture restoring and reposition of macronutrients... (Complete abstract click electronic access below) / Mestre

La faïence est une céramique caractérisée par son revêtement vitreux blanc opaque, grâce à l’adjonction d’oxyde d’étain ; sur ce fond on peut apposer les décors polychromes. Résultant d’une technologie abbaside (VIIIe siècle), elle connait son apogée en France au XVIIIe siècle. Les précédentes études menées sur la faïence moderne ont mis en évidence la nécessité de procéder à une approche pluridisciplinaire pour appréhender ce matériau complexe, ses techniques de fabrication, et cerner les enjeux de sa production. Ce travail de recherche s’inscrit dans la continuité pour s’élargir aux productions faïencières du Sud Ouest de la France quelques peu délaissées du point de vue archéométrique. La manufacture Babut, première faïencerie établie à Bergerac, fut sélectionnée dans ce but. La production perdure sur cinquante ans environ, jusqu’à la Révolution Française.En prenant en considération ces observations, cette thèse a permis tout d’abord d’identifier la production du point de vue des matériaux et des techniques, de mettre en place un référentiel géochimique, ainsi qu’établir un corpus stylistique de base pour cette manufacture. Ensuite l’étude a porté sur l’évaluation du potentiel de méthodes d’analyses non destructives pour l’attribution de provenance directe à partir de la surface des glaçures. Et enfin ce travail a permis d’examiner la place de la faïence bergeracoise et de sa production au sein du tissu industriel régional, et les replacer dans le contexte plus général de la production faïencière française à l’aube de la Révolution industrielle. / Faiences are ceramics defined by a white and opaque glaze, due to the addition of tin oxide decorated or not. This technology appeared during the Abbasid period (VIIIth) and was imported in France around the XIIIth century; they peaked in the XVIIIth century. The previous studies realized on the modern faïences, underline the importance of proceeding to a pluridisciplinarity approach to comprehend this complex material, in the frame of a more global research program on faiences, this work focuses on the production of the South West of France, which have only received limited archaeometrics studies over the last years. The manufacture selected is the fabric of Jean Babut established in the city of Bergerac. The production lasted fifty years until the French Revolution. By analysing all the different results, this work establishes the possibility to proceed to the identification of the production site from technical and material standpoints, to establish a reference group based on the chemical analysis and to design a stylistic reference corpus. A non-destructive methodological approach was developed to evaluate the potential of non-destructive methods to reattribute faiences to a center of production. In addition, this work also reestablishes the production of faiences in the local industrial context and in the french production before the Industrial Revolution.

Coal seam gas has been recognised as a new, potential energy resource in New Zealand. Exploration and assessment programmes carried out by various companies have evaluated the resource and indicated that this unconventional gas may form a part of New Zealand's future energy supply. This study has delineated some of the controls between coal properties and gas content in coal seams in selected New Zealand locations. Four coal cores, one from Huntly (Eocene), two from Ohai (Cretaceous) and one from Greymouth (Cretaceous), have been sampled and analysed in terms of gas content and coal properties. Methods used include proximate, sulphur and calorifc value analyses; ash constituent determination; rank assessment; macroscopic analysis; mineralogical analysis; maceral analysis; and gas analyses (desorption, adsorption, gas quality and gas isotopes). Coal cores varied in rank from sub-bituminous B-A (Huntly); sub-bituminous C-A (Ohai); and high volatile bituminous A (Greymouth). All locations contained high vitrinite content (~85 %) with overall relatively low mineral matter observed in most samples. Mineral matter consisted of both detrital grains (quartz in matrix material) and infilling pores and fractures (clays in fusinite pores; carbonates in fractures). Average gas contents were 1.6 m3/t in the Huntly core, 4.7 m3/t in the Ohai cores, and 2.35 m3/t in the Greymouth core. The Ohai core contained more gas and was more saturated than the other cores. Carbon isotopes indicated that the Ohai gas composition was more mature, containing heavier 13C isotopes than either the Huntly or Greymouth gas samples. This indicates the gas was derived from a mixed biogenic and thermogenic source. The Huntly and Greymouth gases appear to be derived from a biogenic (by CO2 reduction) source. The ash yield proved to be the dominant control on gas volume in all locations when the ash yield was above 10 %. Below 10 % the amount of gas variation is unrelated to ash yield. Although organic content had some influence on gas volume, associations were basin and /or rank dependant. In the Huntly core total gas content and structured vitrinite increased together. Although this relationship did not appear in the other cores, in the Ohai SC3 core lost gas and fusinite are associated with each other, while desmocollinite (unstructured vitrinite) correlated positively with residual gas in the Greymouth core. Although it is generally accepted that higher rank coals will have higher adsorption capacities, this was not seen in this data set. Although the lowest rank coal (Huntly) contains the lowest adsorption capacity, the highest adsorption capacity was not seen in the highest rank coal (Greymouth), but in the Ohai coal instead. The Ohai core acted like a higher rank coal with respect to the Greymouth coal, in terms of adsorption capacity, isotopic signatures and gas volume. Two hypothesis can be used to explain these results: (1) That a thermogenically derived gas migrated from down-dip of the SC3 and SC1 drill holes and saturated the section. (2) Rank measurements (e.g. proximate analyses) have a fairly wide variance in both the Greymouth and Ohai coal cores, thus it maybe feasible that the Ohai cores may be higher rank coal than the Greymouth coal core. Although the second hypothesis may explain the adsorption capacity, isotopic signatures and the gas volume, when the data is plotted on a Suggate rank curve, the Ohai coal core is clearly lower rank than the Greymouth core. Thus, pending additional data, the first hypothesis is favoured.

Coal seam gas has been recognised as a new, potential energy resource in New Zealand. Exploration and assessment programmes carried out by various companies have evaluated the resource and indicated that this unconventional gas may form a part of New Zealand's future energy supply. This study has delineated some of the controls between coal properties and gas content in coal seams in selected New Zealand locations. Four coal cores, one from Huntly (Eocene), two from Ohai (Cretaceous) and one from Greymouth (Cretaceous), have been sampled and analysed in terms of gas content and coal properties. Methods used include proximate, sulphur and calorifc value analyses; ash constituent determination; rank assessment; macroscopic analysis; mineralogical analysis; maceral analysis; and gas analyses (desorption, adsorption, gas quality and gas isotopes). Coal cores varied in rank from sub-bituminous B-A (Huntly); sub-bituminous C-A (Ohai); and high volatile bituminous A (Greymouth). All locations contained high vitrinite content (~85 %) with overall relatively low mineral matter observed in most samples. Mineral matter consisted of both detrital grains (quartz in matrix material) and infilling pores and fractures (clays in fusinite pores; carbonates in fractures). Average gas contents were 1.6 m3/t in the Huntly core, 4.7 m3/t in the Ohai cores, and 2.35 m3/t in the Greymouth core. The Ohai core contained more gas and was more saturated than the other cores. Carbon isotopes indicated that the Ohai gas composition was more mature, containing heavier 13C isotopes than either the Huntly or Greymouth gas samples. This indicates the gas was derived from a mixed biogenic and thermogenic source. The Huntly and Greymouth gases appear to be derived from a biogenic (by CO2 reduction) source. The ash yield proved to be the dominant control on gas volume in all locations when the ash yield was above 10 %. Below 10 % the amount of gas variation is unrelated to ash yield. Although organic content had some influence on gas volume, associations were basin and /or rank dependant. In the Huntly core total gas content and structured vitrinite increased together. Although this relationship did not appear in the other cores, in the Ohai SC3 core lost gas and fusinite are associated with each other, while desmocollinite (unstructured vitrinite) correlated positively with residual gas in the Greymouth core. Although it is generally accepted that higher rank coals will have higher adsorption capacities, this was not seen in this data set. Although the lowest rank coal (Huntly) contains the lowest adsorption capacity, the highest adsorption capacity was not seen in the highest rank coal (Greymouth), but in the Ohai coal instead. The Ohai core acted like a higher rank coal with respect to the Greymouth coal, in terms of adsorption capacity, isotopic signatures and gas volume. Two hypothesis can be used to explain these results: (1) That a thermogenically derived gas migrated from down-dip of the SC3 and SC1 drill holes and saturated the section. (2) Rank measurements (e.g. proximate analyses) have a fairly wide variance in both the Greymouth and Ohai coal cores, thus it maybe feasible that the Ohai cores may be higher rank coal than the Greymouth coal core. Although the second hypothesis may explain the adsorption capacity, isotopic signatures and the gas volume, when the data is plotted on a Suggate rank curve, the Ohai coal core is clearly lower rank than the Greymouth core. Thus, pending additional data, the first hypothesis is favoured.