The work results showed that the T. domingensis was capable of
accumulating more mercury than the species used by Samecka-
Cymerman and Kempers (1996), Qian et al. (1999), Greger et al.
(2005) and two out of the three species studied by Kamal et al.
(2004). The present work showed higher mercury removal efficiency
than all the other reported studies related to T. domingensis.
Moreover, mercury uptake by this plant is also higher than other
metal uptakes by aerial part of the plant as previously reported.
The low mercury background concentration in plant tissue reflects
the probable fact that this metal is non-essential its organism. On
the other hands, high values of water-plant transfer coefficient explain
the high uptake rate by the plant. The relative lack of selectivity
on metals transmembrane transport can be the reason for
the input of non-essential heavy metals in the cells (Soda et al.,
2012).
covering almost entirely the water surface at the ending of experiment,
reaching primary biomass productivity much higher than
undisturbed environment. The concentrations of chromium, nickel
and zinc in the aerial part of the plant were 36.0; 32.0 and
39.0 mg kg1, respectively.
The work results showed that the T. domingensis was capable ofaccumulating more mercury than the species used by Samecka-Cymerman and Kempers (1996), Qian et al. (1999), Greger et al.(2005) and two out of the three species studied by Kamal et al.(2004). The present work showed higher mercury removal efficiencythan all the other reported studies related to T. domingensis.Moreover, mercury uptake by this plant is also higher than othermetal uptakes by aerial part of the plant as previously reported.The low mercury background concentration in plant tissue reflectsthe probable fact that this metal is non-essential its organism. Onthe other hands, high values of water-plant transfer coefficient explainthe high uptake rate by the plant. The relative lack of selectivityon metals transmembrane transport can be the reason forthe input of non-essential heavy metals in the cells (Soda et al.,2012).covering almost entirely the water surface at the ending of experiment,reaching primary biomass productivity much higher thanundisturbed environment. The concentrations of chromium, nickeland zinc in the aerial part of the plant were 36.0; 32.0 and39.0 mg kg1, respectively.
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