Figure 7From: Dual application of duckweed and azolla plants for wastewater treatment and renewable fuels and petrochemicals productionGas chromatography-mass spectroscopy chromatograms of bio-oil from duckweed, azolla and microalgae. (A) duckweed; (B) azollagreen; (C) azollared; (D) microalgae. Arrows show two peaks, at 17.05 minutes and 17.55 minutes, representing a phytol molecule.Back to article page