Exploring an in situ LED-illuminated isothermal micro-calorimetric method to investigating the thermodynamic behavior of Chlorella vulgaris during CO2 bio-fixation

Much endeavor has been dispensed recently to evaluate the potential of CO 2 mitigation by microalgae. We introduce an alternative, novel, LED-illumination isothermal microcalorimetric method to assess the thermodynamic behaviors of microalgae for better understanding of their carbon sequestration ca...

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Veröffentlicht in:Environmental science and pollution research international 2018-07, Vol.25 (19), p.18519-18527
Hauptverfasser: Russel, Mohammad, Liu, Changrui, Alam, Asraful, Wang, Fei, Yao, Jun, Daroch, Maurycy, Shah, Mahfuzur Rahman, Wang, Zhongming
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Sprache:eng
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Zusammenfassung:Much endeavor has been dispensed recently to evaluate the potential of CO 2 mitigation by microalgae. We introduce an alternative, novel, LED-illumination isothermal microcalorimetric method to assess the thermodynamic behaviors of microalgae for better understanding of their carbon sequestration capacity. Microalgae thermodynamic behaviors were recorded as power-time curves, and their indices such as total heat evolution ( Q T ), maximum power output ( P max ) and heat generated by per algae cell ( J N/Q ) were obtained. The values for highest (74.80 g L −1 ) and control sample (0.00 g L −1 ) of Q T , P max and J N/Q were 20.85 and 2.32 J; 252.17 and 57.67 μW; 7.91 ×  −06 and 8.80 ×  −07  J cell −1 , respectively. According to the values of Q T , a general order to promote the CO 2 sequestration was found at 74.8 g L −1  > 29.92 g L −1  > 14.96 g L −1  > 7.48 g L −1  > 0 g L −1 of C sources, which directly corresponded to carbon availability in the growth medium. Chlorella vulgaris GIEC-179 showed the highest peak P max at 74.8 g L −1 concentration which was directly transformed to their biomass during bio-fixation of CO 2 process. This study is applicable for better understanding of CO 2 fixation performance of algae.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-018-1926-1