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| Titel |
Evaluation of three endemic Mediterranean plant species Atriplex halimus, Medicago lupulina and Portulaca oleracea for Phytoremediation of Ni, Pb and Zn |
| VerfasserIn |
Ziad Al Chami, Nasser Amer, Lina Al Bitar, Donato Mondelli, Stefano Dumontet |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250084882
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| Zusammenfassung |
| The success of phytoremediation depends upon the identification of suitable plants species
that hyperaccumulate/tolerate heavy metals and produce large amounts of biomass. In this
study, three endemic Mediterranean plant species Atriplex halimus, Medicago lupulina and
Portulaca oleracea, were grown hydroponically to assess their potential use in
phytoremediation of Ni, Pb and Zn and biomass production. The objective of this
research is to improve phytoremediation procedures by searching for a new endemic
Mediterranean plant species which can be used for phytoremediation of low/moderate
contamination in the Mediterranean arid and semiarid conditions and bioenergy
production. The hydroponics experiment was carried out in a growth chamber using half
strength Hoagland’s solution as control (CTR) and 5 concentrations for Pb and
Zn (5, 10, 25, 50 and 100 mg L-1) and 3 concentrations for Ni (1, 2, and 5 mg
L-1). Complete randomized design with five replications was adopted. Main growth
parameters (shoot and root dry weight, shoot and root length and chlorophyll content)
were determined. Shoots and roots were analyzed for their metals contents. Some
interesting contributions of this research are: (i) plant metal uptake efficiency ranked as
follows: A. halimus > M. lupulina > P. oleracea, whereas heavy metal toxicity
ranked as follows: Ni > Zn > Pb, (ii) none of the plant species was identified as
hyperaccumulator, (iii) Atriplex halimus and Medicago lupulina can accumulate Ni, Pb and
Zn in their roots, (iv) translocate small fraction to their above ground biomass, and (v)
indicate moderate pollution levels of the environment. In addition, as they are a good
biomass producer, they can be used in phytostabilisation of marginal lands and
their above ground biomass can be used for livestock feeding as well for bioenergy
production. |
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