Potential role of oxidative exoenzymes of the extremophilic fungus Pestalotiopsis palmarum BM-04 in biotransformation of extra-heavy crude oil.
Bottom Line: UV-visible spectrophotometry analysis revealed the oxidation of the petroporphyrins in the asphaltenes fraction of biotreated EHCO.Tolerance assays showed the ability of this fungus to grow up to 50,000 p.p.m. of EHCO and 2000 mM of NaCl.These results suggest that P. palmarum BM-04 is a hopeful alternative to be used in remediation processes in extreme environmental conditions of salinity and EHCO contamination, such as the drilling waste from the OOB.
Affiliation: Área de Energía y Ambiente, Instituto de Estudios Avanzados (IDEA), Sartenejas, Caracas, 1080, Venezuela.Show MeSH
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Mentions: Besides, fraction of asphaltenes from biotreated EHCO (Fig. 5) shows a band centred on 410 nm due to the presence of vanadylpetroporphyrins indicating that the biotreatment applied to the EHCO can induce a petroporphyrins oxidation. This phenomenon could be confirmed through the observed variations in the infrared spectra, specifically at sulfoxides and carbonyls regions associated with enzymatic oxidation (García-Arellano et al., 2004). This result confirms those obtained through analysis by ATR-FT-IR.
Affiliation: Área de Energía y Ambiente, Instituto de Estudios Avanzados (IDEA), Sartenejas, Caracas, 1080, Venezuela.