Photoproducts of carminic acid formed by a composite from Manihot dulcis waste.
Food Chem
; 173: 725-32, 2015 Apr 15.
Article
em En
| MEDLINE
| ID: mdl-25466082
Carbon-TiO2 composites were obtained from carbonised Manihot dulcis waste and TiO2 using glycerol as an additive and thermally treating the composites at 800 °C. Furthermore, carbon was obtained from manihot to study the adsorption, desorption and photocatalysis of carminic acid on these materials. Carminic acid, a natural dye extracted from cochineal insects, is a pollutant produced by the food industry and handicrafts. Its photocatalysis was observed under different atmospheres, and kinetic curves were measured by both UV-Vis and HPLC for comparison, yielding interesting differences. The composite was capable of decomposing approximately 50% of the carminic acid under various conditions. The reaction was monitored by UV-Vis spectroscopy and LC-ESI-(Qq)-TOF-MS-DAD, enabling the identification of some intermediate species. The deleterious compound anthracene-9,10-dione was detected both in N2 and air atmospheres.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Manihot
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Carmim
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Nanopartículas
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Corantes de Alimentos
Idioma:
En
Revista:
Food Chem
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
México
País de publicação:
Reino Unido