期刊
ENVIRONMENTAL TECHNOLOGY & INNOVATION
卷 23, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.eti.2021.101613
关键词
Lead; Microalgae; Pb bioremediation; Lipid accumulation; ICPMS; Biodiesel
资金
- Department of Science and Technology (DST) , Government of India, New Delhi
- RUDN University Strategic Academic Leadership Program
Green oleaginous microalgae are promising candidates for the integration of heavy metal bioremediation with biofuel production. In this study, Chlorella sorokiniana was used for lead mitigation and biodiesel production, showing high tolerance to lead exposure and altered lipid profiles under stress conditions. This research provides valuable insights into the potential applications of oleaginous microalgae in environmental remediation and sustainable biofuel production.
Green oleaginous microalgae are good candidates for the integration of heavy metal bioremediation with the generation of biofuels. To be effective, this requires a comprehensive understanding and optimization of the metal concentration that generates maximum growth along with a high yield of lipids from microalgae cells. This work follows the aforementioned strategy and involves the use of oleaginous microalgae Chlorella sorokiniana for lead mitigation and biodiesel production. The short-term effects (IC50 value at 96 h of culture) and the long-term effects (pigments and biomass) of the exposure of lead (Pb) to the growth and biochemical compositions (pigments, proteins, carbohydrates, and lipids) of microalgae have been also determined. Chlorella sorokiniana has a high half-maximal inhibitory concentration (IC50 value and higher metal bio-concentration factor (BCF) for Pb (II), which represents that this strain can be considered as a lead (Pb) hyperbioaccumulator. FTIR analysis revealed a reduction in proteins and carbohydrates under the influence of Pb while an increase in lipids has been recorded. The lipid profile based on H-1 NMR and GC-MS has been followed for the quality analysis of the biodiesel produced that indicated altered lipid profiles under stress by Pb and elevated levels of SFA and MUFA. (C) 2021 Elsevier B.V. All rights reserved.
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