Diatomite
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Obtenção de filtro cerâmico a partir da diatomita e casca de arroz carbonizada visando tratamento de efluente têxtil
Os efluentes liberados pela indústria têxtil possuem altas concentrações de álcalis, carboidratos, proteínas, além de corantes contendo metais pesados. Assim, foi produzido um filtro visando principalmente à remoção da cor. Para sua obtenção foi usado a casca de arroz carbonizada e a diatomita, que possuem basicamente sílica amorfa hidratada na
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/10/2011
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2. Metodologias para reutilização do resíduo de terra diatomácea, proveniente da filtração e clarificação da cerveja
The earth diatomite is a material used by the industries in the filtration process and clarification of the beer. This material presents a reduced useful life due to the blockages of their pores during the filtration process. The objective of this work was to reactivate the properties of filtration of the earth diatomite, saturated with organic matter during
Quím. Nova. Publicado em: 2011
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3. Caracterização de argilas bentonitas e diatomitas e sua aplicação como adsorventes
Five samples of natural clays denominated: diatomite, CN-20, CN-29, CN-40 and CN-45 from Aliança Latina LTDA were characterized by differents supplementary techniques such as: XRD, chemical analysis, adsorption N2 measurements, infrared spectroscopy analysis, thermogravimetric analysis. Clays were tested in adsorption of blue methylene. All of isotherms adj
Química Nova. Publicado em: 2009
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4. Policyclyc aromatic hidrocarbons study at São Vicente and Santos Estuaries SP using diatomite as adsorbent material / Estudo de hidrocarbonetos policíclicos aromáticos nos estuários de Santos e São Vicente/SP utilizando diatomito como material adsorvente
Diatomite spheres were used as an adsorbent material for policyclyc aromatic hidrocarbons (PAH) adsorption at water column for the identification of the main contamination sources at two estuaries of Baixada Santista. The samples were held at Santos Estuary (site 1) and São Vicente Estuary (site 2) during the year 2006, at two sites, and in 2007, only at si
Publicado em: 2008
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5. Tecnologia do Pó de Turmalina Preta
The black tourmaline powder of shorlite-dravite series, NaFe3Al6(Si6O18)(BO3)3(OH)3OH, has been used in agricultures and in the production of cosmetics, paints, tissues, water and air purifiers. The pyroelectricity and the emission of far infrared radiation of tourmaline are the main properties explored by most products. The black tourmaline shows significan
Publicado em: 2008
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6. Uso de argilominerais e diatomita como adsorvente de fenóis em águas produzidas na indústria de petróleo
A produção de petróleo no Brasil vem aumentando a cada ano. Em conseqüência, volumes crescentes de água de produção são gerados com grandes quantidades de contaminantes, o que traz vários problemas no descarte dessas águas. A preocupação para que as concentrações dos contaminantes da água produzida atendam as legislações vigentes para desca
Publicado em: 2008
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7. Utilização de microemulsões como agentes modificadores de superfícies para remoção de íons metálicos
The heavy metals are used in many industrial processes and when discharged to the environment can cause harmful effects to human, plants and animals. The adsorption technology has been used as an effective methodology to remove metallic ions. The search for new adsorbents motivated the development of this research, accomplished with the purpose of removing C
Publicado em: 2001
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8. A food-grade process for isolation and partial purification of bacteriocins of lactic acid bacteria that uses diatomite calcium silicate.
Bacteriocins, including nisin, pediocin PO2, brevicin 286, and piscicolin 126, were extracted from fermentation media by adsorption onto Micro-Cel (a food-grade diatomite calcium silicate anticaking agent) and subsequent desorption. The optimal conditions for desorption of piscicolin 126 were determined and applied to other bacteriocins, and the relative pur
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9. Reanalysis of mortality from lung cancer among diatomaceous earth industry workers, with consideration of potential confounding by asbestos exposure.
OBJECTIVE: To evaluate the potential for confounding from asbestos exposure, primarily chrysotile, on the relation between crystalline silica and mortality from lung cancer among diatomaceous earth (diatomite) workers. METHODS: A reanalysis of a cohort mortality study of diatomite workers was performed to take into account quantitative estimates of asbestos