Characterization and Assessment of Natural Amazonian Clays for Cosmetics-Industry Applications

Clays are abundant materials in the Amazon region and have been used historically by ancient Amazonian people to produce ceramic and cosmetics products. The current study aimed to evaluate the potential of four clays from the metropolitan area of Manaus, each with a different color, for cosmetics ap...

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Bibliographic Details
Published in:Clays and clay minerals 2022-10, Vol.70 (5), p.780-795
Main Authors: Kieling, Antonio Claudio, Silva, Cláudia Cândida, Júnior, Sérgio Duvoisin, de Macedo Neto, José Costa, de Oliveira Melquíades, Miécio, del Pino, Gilberto Garcia, de Souza Moreira, Yago Ono, Panzera, Túlio Hallak, da Silva Valenzuela, Maria das Graças, Diáz, Francisco Rolando Valenzuela
Format: Article
Language:English
Subjects:
Bayer process
Biogeosciences
Calorimetry
Clay
Color
Cosmetics
Differential scanning calorimetry
Differential thermal analysis
Drying ovens
Earth and Environmental Science
Earth Sciences
Electron microscopy
Fluorescence
Geochemistry
Gibbsite
Industrial applications
Infrared analysis
Infrared spectroscopy
Kaolinite
Medicinal Chemistry
Metropolitan areas
Microorganisms
Mineralogy
Nanoscale Science and Technology
Original Paper
Particle size
Scanning electron microscopy
Soil Science & Conservation
Thermal analysis
Thermogravimetry
Toxicity
X rays
X-ray diffraction
X-ray fluorescence
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Summary:Clays are abundant materials in the Amazon region and have been used historically by ancient Amazonian people to produce ceramic and cosmetics products. The current study aimed to evaluate the potential of four clays from the metropolitan area of Manaus, each with a different color, for cosmetics applications. Two clays were collected in the Ponta Negra region (red and gray in color) in Manaus, one in Careiro (white), and one in Itacoatiara (black). After drying in an oven for 24 h at 105°C, the four clays were characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD), infrared (IR) spectroscopy, thermogravimetry (TGA), differential thermal analysis (DTA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), particle-size analysis, and detection of microorganisms. The amounts of Al, Si, Cl, K, Ca, Ti, Cr, Fe, Zn, P, and S in all samples were below the limits for use in cosmetics. The main phases identified were kaolinite 1A, quartz, gibbsite, and the rare kaolinite 2M. Approximately 40 wt.% of each sample was in the 
ISSN:0009-8604
1552-8367
DOI:10.1007/s42860-022-00215-3