dc.contributor.author |
Costa, Marina A. J. L. da |
|
dc.contributor.author |
Gois, Jefferson S. de |
|
dc.contributor.author |
Toaldo, Isabela M. |
|
dc.contributor.author |
Bauerfeldt, Ana Clara Favilla |
|
dc.contributor.author |
Batista, Diego B. |
|
dc.contributor.author |
Bordignon-Luiz, Marilde T. |
|
dc.contributor.author |
Lago, Dalva C. B. do |
|
dc.contributor.author |
Luna, Aderval S. |
|
dc.contributor.author |
Senna, Lilian F. de |
|
dc.date.accessioned |
2022-07-13T20:13:57Z |
|
dc.date.available |
2022-07-13T20:13:57Z |
|
dc.date.issued |
2020 |
|
dc.identifier.citation |
COSTA, M. A. J. L. et al. Optimization of espresso spent ground coffee waste extract preparation and the influence of its chemical composition as an eco-friendly corrosion inhibitor for carbon steel in acid medium. Materials Research, São Carlos, v. 23, n. 5, p. 1-12, 2020. |
pt_BR |
dc.identifier.issn |
1980-5373 |
|
dc.identifier.uri |
https://doi.org/10.1590/1980-5373-MR-2019-0591 |
pt_BR |
dc.identifier.uri |
http://www.sbicafe.ufv.br/handle/123456789/13582 |
|
dc.description.abstract |
This work proposes the reuse of spent ground coffee waste (SCG) extracts as eco-friendly corrosion inhibitors for carbon steel in acid medium, and the correlation between their anticorrosive efficiency and chemical composition. The extraction method was optimized using a central composite design, and the chemical composition of the extracts was accessed using UV-Vis spectrometry, HPLC, and ICP-OES. EIS and Potentiodynamic Polarization (PP) tests evaluated the anticorrosive properties of the extracts. Total phenol content ranged from 93 mg L-1 to 219 mg L-1 Gallic Acid Equivalent. The highest concentration of phenolic compounds was observed for syringic acid (78.67 mg L-1), while the lowest concentration was verified for (-)-epigallocatechin-3-O-gallate (0.01 mg L-1). The Pearson correlation coefficient showed no correlation between the Rct and the total phenol content, although, positive correlations with the Rct was observed for caffeic acid, (+)-catechin, ferulic acid, and protocatechuic acid. EIS analysis revealed that all of the extracts could act as corrosion inhibitors. The best performance was verified for C3 extract (IE % = 94.83%). PP tests showed that this extract acted as a mixed inhibitor, with a predominant cathodic effect. Therefore, the valorization of the extracts as corrosion inhibitors was successfully achieved. |
pt_BR |
dc.format |
pdf |
pt_BR |
dc.language.iso |
en |
pt_BR |
dc.publisher |
ABM, ABC, ABPol |
pt_BR |
dc.relation.ispartofseries |
Materials Research;v.23, n.5, 2020 |
|
dc.rights |
Open Access |
pt_BR |
dc.subject |
Spent ground coffee |
pt_BR |
dc.subject |
Chemical characterization of food |
pt_BR |
dc.subject |
Waste management |
pt_BR |
dc.subject |
Pearson correlation |
pt_BR |
dc.subject |
Green chemistry |
pt_BR |
dc.subject |
Corrosion inhibitor |
pt_BR |
dc.subject.classification |
Cafeicultura::Resíduos e subprodutos do café |
pt_BR |
dc.title |
Optimization of espresso spent ground coffee waste extract preparation and the influence of its chemical composition as an eco-friendly corrosion inhibitor for carbon steel in acid medium |
pt_BR |
dc.type |
Artigo |
pt_BR |