Carbon-dots from babassu coconut (Orbignya speciosa) biomass: Synthesis, characterization, and toxicity to Daphnia magna

The present study provides amethodology for the synthesis of carbon dots through hydrothermal carbonization of the babassu coconut (Orbignya speciosa) mesocarp as a precursor matrix. The synthesis parameters (temperature, residence time and% m/v) were studied through a factorial design with the fluo...

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Autores principales:	Rubens S. Costa, Manuela O. de Castro, Gabriela H. da Silva, Fabricio de S. Delite, Mathias Strauss, Odair P. Ferreira, Diego S.T. Martinez, Bartolomeu C. Viana
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Carbon dots Babassu coconut Factorial design Fluorescence suppression Ecotoxicity Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/399ba36abd5249e19c3ad6e33abff241
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spelling	oai:doaj.org-article:399ba36abd5249e19c3ad6e33abff2412021-11-30T04:18:00ZCarbon-dots from babassu coconut (Orbignya speciosa) biomass: Synthesis, characterization, and toxicity to Daphnia magna2667-056910.1016/j.cartre.2021.100133https://doaj.org/article/399ba36abd5249e19c3ad6e33abff2412021-10-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2667056921001103https://doaj.org/toc/2667-0569The present study provides amethodology for the synthesis of carbon dots through hydrothermal carbonization of the babassu coconut (Orbignya speciosa) mesocarp as a precursor matrix. The synthesis parameters (temperature, residence time and% m/v) were studied through a factorial design with the fluorescence intensity as determining factor in choosing the best sample. Particles with diameters in the range of 2.4 - 47.7 nm were obtained, which presented two emission regions, one at approximately 467 nm (λEX = 370 nm) and the other at approximately 550 nm (λEX = 470 nm). These carbon dots showed the phenomenon of suppression of fluorescence when in the presence of Fe3+, Co2+, Ni2+, Zn2+, Cu2+ and Cd2+ ions, exhibiting good linearity in the fluorescence decay according to the concentration of ions in the medium, indicating potential application as a sensor for these ionic species. Acute toxicity testing with Daphnia magna model demonstrated absence of toxic effect (immobility) of the carbon dots to this aquatic organism bioindicator after 48 h of exposure, even at high concentrations (up to 1000 mg.L−1).Rubens S. CostaManuela O. de CastroGabriela H. da SilvaFabricio de S. DeliteMathias StraussOdair P. FerreiraDiego S.T. MartinezBartolomeu C. VianaElsevierarticleCarbon dotsBabassu coconutFactorial designFluorescence suppressionEcotoxicityChemistryQD1-999ENCarbon Trends, Vol 5, Iss , Pp 100133- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Carbon dots Babassu coconut Factorial design Fluorescence suppression Ecotoxicity Chemistry QD1-999
spellingShingle	Carbon dots Babassu coconut Factorial design Fluorescence suppression Ecotoxicity Chemistry QD1-999 Rubens S. Costa Manuela O. de Castro Gabriela H. da Silva Fabricio de S. Delite Mathias Strauss Odair P. Ferreira Diego S.T. Martinez Bartolomeu C. Viana Carbon-dots from babassu coconut (Orbignya speciosa) biomass: Synthesis, characterization, and toxicity to Daphnia magna
description	The present study provides amethodology for the synthesis of carbon dots through hydrothermal carbonization of the babassu coconut (Orbignya speciosa) mesocarp as a precursor matrix. The synthesis parameters (temperature, residence time and% m/v) were studied through a factorial design with the fluorescence intensity as determining factor in choosing the best sample. Particles with diameters in the range of 2.4 - 47.7 nm were obtained, which presented two emission regions, one at approximately 467 nm (λEX = 370 nm) and the other at approximately 550 nm (λEX = 470 nm). These carbon dots showed the phenomenon of suppression of fluorescence when in the presence of Fe3+, Co2+, Ni2+, Zn2+, Cu2+ and Cd2+ ions, exhibiting good linearity in the fluorescence decay according to the concentration of ions in the medium, indicating potential application as a sensor for these ionic species. Acute toxicity testing with Daphnia magna model demonstrated absence of toxic effect (immobility) of the carbon dots to this aquatic organism bioindicator after 48 h of exposure, even at high concentrations (up to 1000 mg.L−1).
format	article
author	Rubens S. Costa Manuela O. de Castro Gabriela H. da Silva Fabricio de S. Delite Mathias Strauss Odair P. Ferreira Diego S.T. Martinez Bartolomeu C. Viana
author_facet	Rubens S. Costa Manuela O. de Castro Gabriela H. da Silva Fabricio de S. Delite Mathias Strauss Odair P. Ferreira Diego S.T. Martinez Bartolomeu C. Viana
author_sort	Rubens S. Costa
title	Carbon-dots from babassu coconut (Orbignya speciosa) biomass: Synthesis, characterization, and toxicity to Daphnia magna
title_short	Carbon-dots from babassu coconut (Orbignya speciosa) biomass: Synthesis, characterization, and toxicity to Daphnia magna
title_full	Carbon-dots from babassu coconut (Orbignya speciosa) biomass: Synthesis, characterization, and toxicity to Daphnia magna
title_fullStr	Carbon-dots from babassu coconut (Orbignya speciosa) biomass: Synthesis, characterization, and toxicity to Daphnia magna
title_full_unstemmed	Carbon-dots from babassu coconut (Orbignya speciosa) biomass: Synthesis, characterization, and toxicity to Daphnia magna
title_sort	carbon-dots from babassu coconut (orbignya speciosa) biomass: synthesis, characterization, and toxicity to daphnia magna
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/399ba36abd5249e19c3ad6e33abff241
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Carbon-dots from babassu coconut (Orbignya speciosa) biomass: Synthesis, characterization, and toxicity to Daphnia magna

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