Phosphorite
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. FAST DETERMINATION OF THE SULFUR SPECIES IN SOLID PHASE SYSTEMS BY A TPO-IR METHOD
Qualitative and quantitative assessment of total sulfur and sulfur species in solid phase is necessarily important for development of effective desulfurization methods, reduction of environmental pollution, and prevention of catalyst poisoned. In this work, TPO-IR (Temperature Programmed Oxidation- Infrared) method was used for rapid determination of sulfur
Quím. Nova. Publicado em: 2021-01
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2. BIODECOMPOSITION OF JORDAN PHOSPHORITE BY PHOSPHATE-SOLUBILIZING FUNGI
Abstract The bio-solubilization of Jordan phosphorite by the phosphate-solubilizing fungus Aspergillus niger has been investigated. The effect of the phosphate concentration in the liquid medium, the duration of biodecomposition, titratable acidity and the effect of preliminary mechanical activation on the process of dissolution have been studied. The invest
Braz. J. Chem. Eng.. Publicado em: 2016-03
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3. Fosforitos do Grupo Bambuí na região de Campos Belos (GO)/ Arraias (TO), na borda oeste do Cráton São Francisco
Sao Bento, Coite 1 and Coite 2 are the three sedimentary phosphate deposits known to date in the Campos Belos (GO) and Arraias (TO) region. They are 3 low volume but high grade deposits, with more than 24% P2O5. The phosphorites and siltites found in that region occur at the bottom of the Sete Lagoas Formation, as part of the Neoproterozoic Bambui Group. The
Publicado em: 2009
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4. Estratigrafia da seqÃÃncia clÃstica inferior (andares coniaciano-maastrichtiano inferior) da Bacia da ParaÃba e suas implicaÃÃes paleoestratigrÃficas
A Bacia da ParaÃba està localizada na faixa costeira dos estados de Pernambuco e da ParaÃba, entre o Lineamento Pernambuco, em Recife-PE, e o Alto de Mamanguape, ao norte de JoÃo Pessoa-PB, abrangendo uma Ãrea de aproximadamente de 5.300 km2 em sua porÃÃo emersa. à uma bacia de margem continental passiva e està inserida na porÃÃo leste da ProvÃnc
Publicado em: 2006
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5. Precambrian animal diversity: Putative phosphatized embryos from the Doushantuo Formation of China
Putative fossil embryos and larvae from the Precambrian phosphorite rocks of the Doushantuo Formation in Southwest China have been examined in thin section by bright field and polarized light microscopy. Although we cannot completely exclude a nonbiological or nonmetazoan origin, we identified what appear to be modern cnidarian developmental stages, includin
The National Academy of Sciences.