A5003768386- Recycling and utilization of industrial and municipal waste in materials production
- Clay minerals and soil interactions
- Concrete and Cement Materials Research
- Magnesium Oxide Properties and Applications
- Maritime and Coastal Archaeology
- Geochemistry and Elemental Analysis
- Geology and Paleoclimatology Research
- Geological and Geochemical Analysis
- X-ray Diffraction in Crystallography
- Iron oxide chemistry and applications
- Amazonian Archaeology and Ethnohistory
- Mineral Processing and Grinding
- Archaeology and ancient environmental studies
- Bauxite Residue and Utilization
- Coastal wetland ecosystem dynamics
- Geochemistry and Geologic Mapping
- Archaeology and Historical Studies
- Education, Healthcare and Sociology Research
- CO2 Sequestration and Geologic Interactions
- Nuclear Physics and Applications
Martin Luther University Halle-Wittenberg
2021-2022
Universidade Federal do Pará
2017-2018
Abstract A comparison of Rietveld refinement results for a bauxite-bearing regolith and its clayey cover in the Amazon region was made with stoichiometric calculations from chemical analysis partly thermogravimetric results. For this investigation profile occurrence ALCOA bauxite mine at Juruti, Brazil studied. The different minerals, their compositions low crystallinity horizons were investigated contents determined. It is evident that some minerals show several generations composition...
Mineralogical appraisal is an important tool for both mining and industrial processes. X-ray powder diffraction analysis (XRPD) can deliver fast reliable mineralogical quantification results to aid processes improve ore recoveries. Furthermore, fluorescence (XRF) chemical data, thermal (TA), Fourier-transformed infrared spectroscopy (FTIR) be used validate refine XRPD results. assessment of non-traditional ores, such as wastes, also step consider them near-future industries. In the Brazilian...
Bauxite deposits in the Amazon region are commonly covered by yellowish clays which can reach up to 25m thick, known as Belterra Clay (BTC). In Rondon do Pará, Eastern Amazon, BTC is 13m thick and covers world-class bauxite reserves. Three pilot mines were investigated Pará for an initial characterization of local BTC. discordant contact with lateritic profile, has reddish brown colors at its base ocher tones towards top. It a massive structure silt-clayey texture nodular bauxitic fragments...
X-ray powder diffraction (XRPD) analysis combined with the Rietveld method is commonly used in mineralogical quantification of a range different samples, including soil, rocks, and many industrial materials. The combination this technique addition method, i.e. successive mineral phase to investigated sample, offers simple reliable test results without need for third techniques. Four hydrated cement samples were mixed (at 1, 5, 10%) one main mineral-related phases (ettringite, larnite,...
Sulfobelite (belite-rich calcium sulfoaluminate (BCSA)) cements are promising alternatives to ordinary Portland cement (OPC) due their lower carbon dioxide generation and energy consumption in the clinkering process. Additionally, they cost effective because of less-restrictive raw meal composition compared with that (CSA), which expensive bauxites used as alumina source. Diverse mining residues have been proved be reliable sources for BCSA production, including clay cover (Belterra Clay...
This study provides an environmental reconstruction of archaeological site in the northern part northeastern Brazil. To understand how climate, relative sea-level (RSL), and human activities triggered changes Maranhão State during Holocene, a multi-proxy analysis has been done 450 cm long sediment core. The core radiocarbon dated analyzed by its content pollen, spores, micromorphological spot chemical analyzes Scanning Electron Microscope (SEM), multi-element analyzes, X-ray Powder...
How to start this text? Talking (or writing) about a loved one who has passed away is not easy. Especially when it happens unexpectedly. When I finally started text, realized that despite being difficult, very comforting translate so many good memories into words.