Cladonia verticillaris (lichen) indicates negative impacts derived from the combustion of biodiesel blends: an alert for the environmental management for biofuels use

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Silva, Bruno F. da and Pereira, Iwelton M. C. and Melo, James C. de and Martins, Mônica C.B. and Barbosa, Mariana O. and Silva, Andrezza K. O. and Siqueira, Williams N. de and Silva, Nicaçio H. da and Oliveira, Antônio F. M. de and Vicente Córdoba, Carlos and Legaz González, María Estrella and Pereira, Eugênia C. (2021) Cladonia verticillaris (lichen) indicates negative impacts derived from the combustion of biodiesel blends: an alert for the environmental management for biofuels use. Environmental Monitoring and Assessment, 193 (809). ISSN 0167-6369

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Official URL: https://doi.org/10.1007/s10661-021-09610-0



Abstract

The use of biodiesel blends with petroleum diesel in vehicular engines demands the evaluation of the possible impacts and effects of the gases emitted from their combustion on the environment. Among studies on these questions, biomonitoring using lichens is a viable alternative, given their interactions with the elements dispersed in the atmosphere, as well as its sensitivity and capacity to retain contaminants. In this study, we analyzed the effects of gas emissions from the combustion of biodiesel mixture with petroleum diesel on Cladonia verticillaris thalli. Samples of the lichen (10 g) were exposed to the gases emitted by the exhaust of the generator engine during the combustion process of biodiesel mixtures to petroleum diesel (7% (B7), 10% (B10), 40% (B40), 50% (B50), and 70% (B70)). At 90 days after exposure, samples were analyzed for n-alkane profiles, thallus morphology, photosynthetic pigment contents, and secondary lichen metabolites (protocetraric and fumarprotocetraric acids). Sets B7 and B10 showed better resistance of the lichen to pollutants. Set B40 showed a high stress evidenced by the chain elongation of n-alkanes structure and high chlorophyll production, presenting high morphological damages when compared to the control sets, B7 and B10. The results showed significant reductions of n-alkanes profiles for mixtures with high concentrations of biodiesel (B50 and B70), as well as decreases in the chlorophyll content. These groups showed an increase in the synthesis of secondary metabolites, corroborating the hypothesis that high concentrations of biodiesel in the mixture with petroleum diesel have greater impacts on the lichen.


Item Type:Article
Uncontrolled Keywords:Atmospheric pollutants; Biomonitoring; Cladoniaceae; Cotton blends; Environmental impacts
Subjects:Medical sciences > Biology > Ecology
Medical sciences > Biology > Plant physiology
ID Code:73546
Deposited On:11 Jul 2022 14:00
Last Modified:02 Aug 2022 08:30

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