Tracers Chemistry
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Prospecção geoquímica: estaurolita, ilmenita e magnetita como minerais traçadores para depósitos do tipo VMS / Chemistry prospection: staurolite, ilmenite, magnetite guide minerals for VMS deposits
The Itutinga region was studied for BP mineration in 80s , where they found sulphide mineralization in lenses (Zn-Cu-Ag-Fe) associated with komatiitic peridotite rocks and tholeitic basalts (amphibolites) of greenstone belts, near of Fazenda São Jerônimo. With this information in the literature the propose is study the staurolite, magnetite and ilmenite fo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/09/2011
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2. Set of miniaturized structure used for manipulation of mixture. / Conjunto de estruturas miniaturizadas para manipulação de misturas.
Nowadays, mainly due to products miniaturization, engineering faces new horizons, which can be easily exemplified by the enhancement on nanotechnology development. Furthermore, not only environmental contamination but also environmental monitoring must be addressed in order to produce a systemic knowledge. Therefore, the aim of this work was to determine how
Publicado em: 2010
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3. Traçadores: o uso de agentes químicos para estudos hidrológicos, ambientais, petroquímicos e biológicos
This paper presents a revision of the history, definitions, and classification of tracers (natural and artificial, internal and external). The fundamental ideas concerning tracers are described, followed by their application illustrated by typical examples. The advantages and disadvantages of five classes among the most frequently used external tracers (fluo
Química Nova. Publicado em: 2009
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4. Uma nova abordagem numérica para a injeção de traçadores em reservatórios de petróleo / A new numerical approach for the injection of tracers in petroleum reservoirs
The injection of tracers are used in the investigation of ows in heterogeneous porous media, in studies related to the simulation of miscible dispacements in petroleum reservoirs and the dispersion of contaminants in aquifers. In this work we present new algorithms for the numerical approximation of tracer injection problems. We discuss recent developments o
Publicado em: 2008
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5. Alquilbenzeno sulfonato linear: uma abordagem ambiental e analítica
The environmental impact of detergents and other consumer products is behind the continued interest in the chemistry of the surfactants used. Of these, linear alkylbenzene sulfonates (LASs) are most widely employed in detergent formulations. The precursors to LASs are linear alkylbenzenes (LABs). There is also interest in the chemistry of these hydrocarbons,
Química Nova. Publicado em: 2006-10
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6. Caracterização do material particulado inalavel (MP10) na atmosfera de Paulinia e região
The present work evaluated the particulate matter (PM10) emission contributions of the Replan catalytic cracking plant in the inhalable particulate matter (PM10) of the region affected by the refinery. To separate the contribution of the source under investigation from other sources that contribute to the particulate matter in suspension, the receptor model
Publicado em: 2003
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7. Characterization of complex mineral assemblages: Implications for contaminant transport and environmental remediation
Surface reactive phases of soils and aquifers, comprised of phyllosilicate and metal oxohydroxide minerals along with humic substances, play a critical role in the regulation of contaminant fate and transport. Much of our knowledge concerning contaminant-mineral interactions at the molecular level, however, is derived from extensive experimentation on m
The National Academy of Sciences.