Aquatic plant Azolla as the universal feedstock for biofuel production

Table 2 Se absorption by Azolla filiculoides biomass

SeSW	Se concentration in biomass, mg/gDW	Se absorbtion by 0.3 g of biomass, µg	Theoretical absorption, µg^a	Se absorption, %	Absorption rate, Se/gDW-day
Control	0.072 ± 0.03	21.6 ± 3.01	NA	NA	NA
50 %	0.358 ± 0.12*	85.8 ± 18.0^b	101	85 %	133.5 ± 19.4*
100 %	0.404 ± 0.18*	99.4 ± 17.4^b	119	83 %	158.8 ± 27.1*

Control, Se accumulation in Azolla biomass at time 0
NA not analysed
Significance levels: p < 0.05
^aTheoretical absorption by 0.3 g DW of A. filiculoides calculated based on reduction of Se amount in 500 ml of wastewater after 5 days of treatment
^bnet amount of Se accumulated in 0.3 g of dry biomass after 5 days growth in SeSW (with 21.6 µg of Se subtracted)

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