Sulfides Speciation
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Mercurio e sulfetos volatilizaveis por acidos na bacia do Rio Jundiai, SP / Mercury and acid-volatile sulfides in the Jundiai River basin, SP
The present work describes environmental aspects related to Jundiaí River and Piraí Stream, both belonging to Jundiaí River basin, which is a sub-basin of the Piracicaba/Capivari/Jundiaí Watershed Committee in São Paulo, Brazil. This work generated an important and unpublished inventory regarding the region at the beginning of this century, which will b
Publicado em: 2009
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2. VOLTAMMETRIC DETERMINATION OF LOW MOLECULAR WEIGHT SULFUR COMPOUNDS IN ASPHALT SAMPLES / DETERMINAÇÃO VOLTAMÉTRICA DE COMPOSTOS DE ENXOFRE DE BAIXO PESO MOLECULAR EM AMOSTRAS DE ASFALTO.
O teor de compostos de enxofre em asfalto tem relação com parâmetros de qualidade como reatividade, corrosibilidade, toxicidade e potencial poluidor. Neste trabalho, um método para a determinação simultânea de compostos de enxofre inorgânico e orgânicos de baixo peso molecular foi desenvolvido. A separação dos analitos das amostras asfálticas foi
Publicado em: 2008
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3. Fatores que governam a especiação do cobre em ambientes aquáticos urbanos: evidências da contribuição de sulfetos solúveis
Copper speciation and behavior in different rivers located in the city of Curitiba were evaluated in this work. Sampling locations were selected to cover different levels of urbanization regarding their anthropogenic occupation and land use. Results showed that in highly-developed areas, both organic matter and dissolved sulfides were able to control copper
Química Nova. Publicado em: 2007-04
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4. The influence of sulfur and iron on dissolved arsenic concentrations in the shallow subsurface under changing redox conditions
The chemical speciation of arsenic in sediments and porewaters of aquifers is the critical factor that determines whether dissolved arsenic accumulates to potentially toxic levels. Sequestration of arsenic in solid phases, which may occur by adsorption or precipitation processes, controls dissolved concentrations. We present synchrotron x-ray absorption spec
National Academy of Sciences.