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Issue 79, 2014
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The oxidation product (NO3) of NO pollutant in flue gas used as a nitrogen source to improve microalgal biomass production and CO2 fixation

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Abstract

In order to eliminate the inhibition effect of the toxic nitric oxide (NO) in flue gas on microalgal growth and CO2 fixation, NO was converted by a wet UV/H2O2 method to produce nitrate (NO3), which then be used as a nitrogen source for microalgae to improve its growth. The growth ability and biomass compositions of the microalgae cultivated with the produced NO3 from NO gas were similar to those of the microalgae cultivated with equivalent moles of commercial NaNO3. The NO3 concentration produced from NO increased with UV lamp power, H2O2, and NO concentrations, resulting in an improved microalgal growth. The concentration of NO3 from 500 ppm NO wet-oxidized by 6% (v/v) H2O2 and 55 W UV light was up to 8.8 mM. When the produced nitrate was used as supplementary nitrogen source, the maximum growth productivity of Chlorella PY-ZU1 at 15% (v/v) CO2 reached 1.18 g L−1 per day (0.97 times higher than that cultivated with the standard medium). The peak fixation efficiency of 15% (v/v) CO2 was 69.6% (1.13 times higher than that cultivated with the standard medium).

Graphical abstract: The oxidation product (NO3−) of NO pollutant in flue gas used as a nitrogen source to improve microalgal biomass production and CO2 fixation

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Publication details

The article was received on 09 Jun 2014, accepted on 29 Aug 2014 and first published on 29 Aug 2014


Article type: Paper
DOI: 10.1039/C4RA05491A
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Citation: RSC Adv., 2014,4, 42147-42154
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    The oxidation product (NO3) of NO pollutant in flue gas used as a nitrogen source to improve microalgal biomass production and CO2 fixation

    J. Cheng, Y. Huang, H. Lu, R. Huang, J. Zhou and K. Cen, RSC Adv., 2014, 4, 42147
    DOI: 10.1039/C4RA05491A

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