Photocatalytic Degradation of Textile dye Orange-122 Via Electrospray Mass Spectrometry
Braz. arch. biol. technol
;
63: e20180573, 2020. tab, graf
Article
in English
| LILACS
| ID: biblio-1132185
ABSTRACT
Abstract This work reports the study of the potential application of Zn/TiO2 catalysts, obtained by the sol-gel method, in processes of environmental decontamination through the reactions of photodegradation of textile dye, followed by electrospray mass spectrometry. The catalysts synthesis was performed according to a 2² factorial design with repetition at the central point. The characterization techniques used were N2 adsorption measurements (BET method), scanning electron microscopy with energy dispersive X-ray (MEV/EDS), X-ray diffraction and point of zero charge (PZC). The photocatalytic tests were performed in batch in the presence of sunlight, and to evaluate the degradation kinetics study, a rapid direct injection electrospray mass spectrometry (DI-ESI-MS) method has been developed. By the photocatalytic tests, the calcination temperature of 400 °C has shown the best results of discoloration for the reactive Orange-122 dye (99.76%) in a reaction time of 2h. The discoloration kinetics were a pseudo-first order, and a statistical analysis was performed to investigate the effects of the variables and to optimize the conditions of discoloration to the dye. After the reactional time of 2 h, an ion of m/z 441.5 was detected by ESI-MS, indicating that the photocatalytic process was effective for the degradation of the dye to secondary compounds.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Azo Compounds
/
Biodegradation, Environmental
/
Decontamination
/
Tandem Mass Spectrometry
/
Environmental Restoration and Remediation
/
Wastewater
Type of study:
Prognostic study
Language:
English
Journal:
Braz. arch. biol. technol
Journal subject:
Biology
Year:
2020
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Federal University of Parana/BR
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