Investigation of the impact of natural antioxidants found in coffee leaves, yerba mate, and jambolan pulp on the induction period and rate constant of biodiesel oxidation reaction in the presence of metallic ions
The present study describes the antioxidant potential of ethanolic extracts of yerba mate (Ilex paraguariensis), coffee leaves (Coffea arabica) and jambolan pulp (Syzygium cumini Lamarck) when added to biodiesel, with and without chromium (Cr3+), manganese (Mn2+) and cobalt (Co2+) metal ions, measur...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2025-02-01
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| Series: | Química Nova |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422025000400311&lng=en&tlng=en |
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| author | Isadora G. Branco Julia W. Campos Eduardo G. de Sousa Nathan F. Silva José Gonçales Filho Elis Pauli Érica S. Romagnoli Ana C. G. Mantovani Dionisio Borsato |
| author_facet | Isadora G. Branco Julia W. Campos Eduardo G. de Sousa Nathan F. Silva José Gonçales Filho Elis Pauli Érica S. Romagnoli Ana C. G. Mantovani Dionisio Borsato |
| author_sort | Isadora G. Branco |
| collection | DOAJ |
| description | The present study describes the antioxidant potential of ethanolic extracts of yerba mate (Ilex paraguariensis), coffee leaves (Coffea arabica) and jambolan pulp (Syzygium cumini Lamarck) when added to biodiesel, with and without chromium (Cr3+), manganese (Mn2+) and cobalt (Co2+) metal ions, measuring the induction period (IP) and the rate constant (k) of the oxidation reaction at 110 °C. Antioxidant activity was observed in all extracts, as they reduced k and increased the IP compared to the control sample. The coffee leaves extract had the most pronounced positive effect, increasing the IP to 12.42 h and reducing k by 5.9 times. However, biodiesel containing metallic ions of chromium, manganese and cobalt, both with and without natural extracts, reduced the IP in all assays conducted in this study. The natural yerba mate extract was the most affected by the manganese ion (Mn2+), reducing the IP by 41.61%. The chromium ion (Cr3+) had the least impact on the biodiesel oxidation process in the presence of coffee leaves extract, increasing the rate constant by 3.55%. Furthermore, the alcoholic jambolan pulp extract was the one that presented the best antioxidant properties in the presence of metal ions. |
| format | Article |
| id | doaj-art-837084a5f999487895b6110db0675251 |
| institution | Kabale University |
| issn | 1678-7064 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Química Nova |
| spelling | doaj-art-837084a5f999487895b6110db06752512025-02-11T07:43:26ZengSociedade Brasileira de QuímicaQuímica Nova1678-70642025-02-0148410.21577/0100-4042.20250099Investigation of the impact of natural antioxidants found in coffee leaves, yerba mate, and jambolan pulp on the induction period and rate constant of biodiesel oxidation reaction in the presence of metallic ionsIsadora G. BrancoJulia W. CamposEduardo G. de SousaNathan F. SilvaJosé Gonçales FilhoElis PauliÉrica S. RomagnoliAna C. G. Mantovanihttps://orcid.org/0000-0001-8773-8072Dionisio Borsatohttps://orcid.org/0000-0003-2281-0242The present study describes the antioxidant potential of ethanolic extracts of yerba mate (Ilex paraguariensis), coffee leaves (Coffea arabica) and jambolan pulp (Syzygium cumini Lamarck) when added to biodiesel, with and without chromium (Cr3+), manganese (Mn2+) and cobalt (Co2+) metal ions, measuring the induction period (IP) and the rate constant (k) of the oxidation reaction at 110 °C. Antioxidant activity was observed in all extracts, as they reduced k and increased the IP compared to the control sample. The coffee leaves extract had the most pronounced positive effect, increasing the IP to 12.42 h and reducing k by 5.9 times. However, biodiesel containing metallic ions of chromium, manganese and cobalt, both with and without natural extracts, reduced the IP in all assays conducted in this study. The natural yerba mate extract was the most affected by the manganese ion (Mn2+), reducing the IP by 41.61%. The chromium ion (Cr3+) had the least impact on the biodiesel oxidation process in the presence of coffee leaves extract, increasing the rate constant by 3.55%. Furthermore, the alcoholic jambolan pulp extract was the one that presented the best antioxidant properties in the presence of metal ions.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422025000400311&lng=en&tlng=eninduction perioddegradationbiofuelantioxidant |
| spellingShingle | Isadora G. Branco Julia W. Campos Eduardo G. de Sousa Nathan F. Silva José Gonçales Filho Elis Pauli Érica S. Romagnoli Ana C. G. Mantovani Dionisio Borsato Investigation of the impact of natural antioxidants found in coffee leaves, yerba mate, and jambolan pulp on the induction period and rate constant of biodiesel oxidation reaction in the presence of metallic ions Química Nova induction period degradation biofuel antioxidant |
| title | Investigation of the impact of natural antioxidants found in coffee leaves, yerba mate, and jambolan pulp on the induction period and rate constant of biodiesel oxidation reaction in the presence of metallic ions |
| title_full | Investigation of the impact of natural antioxidants found in coffee leaves, yerba mate, and jambolan pulp on the induction period and rate constant of biodiesel oxidation reaction in the presence of metallic ions |
| title_fullStr | Investigation of the impact of natural antioxidants found in coffee leaves, yerba mate, and jambolan pulp on the induction period and rate constant of biodiesel oxidation reaction in the presence of metallic ions |
| title_full_unstemmed | Investigation of the impact of natural antioxidants found in coffee leaves, yerba mate, and jambolan pulp on the induction period and rate constant of biodiesel oxidation reaction in the presence of metallic ions |
| title_short | Investigation of the impact of natural antioxidants found in coffee leaves, yerba mate, and jambolan pulp on the induction period and rate constant of biodiesel oxidation reaction in the presence of metallic ions |
| title_sort | investigation of the impact of natural antioxidants found in coffee leaves yerba mate and jambolan pulp on the induction period and rate constant of biodiesel oxidation reaction in the presence of metallic ions |
| topic | induction period degradation biofuel antioxidant |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422025000400311&lng=en&tlng=en |
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