Colored aluminates pigments obtained from metallic aluminum waste, an opportunity in the circular economy

In order to contribute to sustainability and follow the goals of the circular economy, colored aluminates were prepared using metallic aluminum (discarded tin seal) as a precursor for application as ecofriendly synthetic inorganic pigments. To obtain colored pigments, aliquots containing aluminum in...

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Autores principales:	Dienifer F.L. Horsth, Julia O. Primo, Mariane Dalpasquale, Carla Bittencourt, Fauze J. Anaissi
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Recycling Inorganic pigments Colorimetry Sustainability Renewable energy sources TJ807-830 Environmental engineering TA170-171
Acceso en línea:	https://doaj.org/article/96e6994ad76e4f649d4f6caaac3bdee0
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id	oai:doaj.org-article:96e6994ad76e4f649d4f6caaac3bdee0
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spelling	oai:doaj.org-article:96e6994ad76e4f649d4f6caaac3bdee02021-11-12T04:48:50ZColored aluminates pigments obtained from metallic aluminum waste, an opportunity in the circular economy2666-790810.1016/j.clet.2021.100313https://doaj.org/article/96e6994ad76e4f649d4f6caaac3bdee02021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666790821002731https://doaj.org/toc/2666-7908In order to contribute to sustainability and follow the goals of the circular economy, colored aluminates were prepared using metallic aluminum (discarded tin seal) as a precursor for application as ecofriendly synthetic inorganic pigments. To obtain colored pigments, aliquots containing aluminum in solution (by acid digestion) were doped (10%, m/m) with Cr, Mn, Fe, Co, Ni chloride salts precipitated by pH control, followed by either drying at 70 °C or calcination at 1000 °C. The pigments were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, Raman and electronic spectroscopy. The data analysis indicates the transformation of the alumina phase (η-Al2O3) into aluminates by insertion of coloring ions, with a low degree of crystallinity (<41%), and average crystallite size less than 50 nm, i.e., nanoparticles. The composition was estimated as aluminates [Mx(Al2O4)1-x] for x = 0.21–0.43, ie, corresponding to a range between 10 and 27% chromophore metal. Colorimetric measurements were performed according to the CIELab* colorimetry system. Pigments are mostly in the quadrant (+a and +b) and can be classified as hot colors, which remain when dispersed in paint. The use of colored aluminates from recycled metallic aluminum as synthetic inorganic pigments was shown to be feasible.Dienifer F.L. HorsthJulia O. PrimoMariane DalpasqualeCarla BittencourtFauze J. AnaissiElsevierarticleRecyclingInorganic pigmentsColorimetrySustainabilityRenewable energy sourcesTJ807-830Environmental engineeringTA170-171ENCleaner Engineering and Technology, Vol 5, Iss , Pp 100313- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Recycling Inorganic pigments Colorimetry Sustainability Renewable energy sources TJ807-830 Environmental engineering TA170-171
spellingShingle	Recycling Inorganic pigments Colorimetry Sustainability Renewable energy sources TJ807-830 Environmental engineering TA170-171 Dienifer F.L. Horsth Julia O. Primo Mariane Dalpasquale Carla Bittencourt Fauze J. Anaissi Colored aluminates pigments obtained from metallic aluminum waste, an opportunity in the circular economy
description	In order to contribute to sustainability and follow the goals of the circular economy, colored aluminates were prepared using metallic aluminum (discarded tin seal) as a precursor for application as ecofriendly synthetic inorganic pigments. To obtain colored pigments, aliquots containing aluminum in solution (by acid digestion) were doped (10%, m/m) with Cr, Mn, Fe, Co, Ni chloride salts precipitated by pH control, followed by either drying at 70 °C or calcination at 1000 °C. The pigments were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, Raman and electronic spectroscopy. The data analysis indicates the transformation of the alumina phase (η-Al2O3) into aluminates by insertion of coloring ions, with a low degree of crystallinity (<41%), and average crystallite size less than 50 nm, i.e., nanoparticles. The composition was estimated as aluminates [Mx(Al2O4)1-x] for x = 0.21–0.43, ie, corresponding to a range between 10 and 27% chromophore metal. Colorimetric measurements were performed according to the CIELab* colorimetry system. Pigments are mostly in the quadrant (+a and +b) and can be classified as hot colors, which remain when dispersed in paint. The use of colored aluminates from recycled metallic aluminum as synthetic inorganic pigments was shown to be feasible.
format	article
author	Dienifer F.L. Horsth Julia O. Primo Mariane Dalpasquale Carla Bittencourt Fauze J. Anaissi
author_facet	Dienifer F.L. Horsth Julia O. Primo Mariane Dalpasquale Carla Bittencourt Fauze J. Anaissi
author_sort	Dienifer F.L. Horsth
title	Colored aluminates pigments obtained from metallic aluminum waste, an opportunity in the circular economy
title_short	Colored aluminates pigments obtained from metallic aluminum waste, an opportunity in the circular economy
title_full	Colored aluminates pigments obtained from metallic aluminum waste, an opportunity in the circular economy
title_fullStr	Colored aluminates pigments obtained from metallic aluminum waste, an opportunity in the circular economy
title_full_unstemmed	Colored aluminates pigments obtained from metallic aluminum waste, an opportunity in the circular economy
title_sort	colored aluminates pigments obtained from metallic aluminum waste, an opportunity in the circular economy
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/96e6994ad76e4f649d4f6caaac3bdee0
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Colored aluminates pigments obtained from metallic aluminum waste, an opportunity in the circular economy

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