Abstract：
:Arsenic (V) uptake from groundwater by using Vallisneria gigantea plants was studied using batch experiments. Reflectance and fluorescence of intact plants were investigated and changes in photophysical properties following arsenic absorption were reported. Good correlations have been found between arsenic concentration in groundwater and parameters derived from reflectance and fluorescence measurements. This system reached its equilibrium after seven days when the removal quantities were strongly dependent on the initial arsenic concentration. Interestingly, Vallisneria plants were able to accumulate from 100 to 600 mg As kg(-1) in roots and fronds although the translocation factors were low (0.6-1.6). Kinetic data for biosorption process followed a first-order law. At low arsenic concentrations the uptake in plants was governed by diffusion aspects. Langmuir, Freundlich and Dubinin-Radushkevich models were applied and results demonstrated that arsenic uptake was better described by the Langmuir model. As a final remark we concluded that a plant of this species should be able to remove 1mg As per week.
journal_name
Chemospherejournal_title
Chemosphereauthors
Iriel A,Lagorio MG,Fernández Cirelli Adoi
10.1016/j.chemosphere.2015.06.053subject
Has Abstractpub_date
2015-11-01 00:00:00pages
383-9eissn
0045-6535issn
1879-1298pii
S0045-6535(15)00672-4journal_volume
138pub_type
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