Biosorption of arsenic from groundwater using Vallisneria gigantea plants. Kinetics, equilibrium and photophysical considerations
| Autor: | Alicia Fernández Cirelli, M. Gabriela Lagorio, Analia Iriel |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Environmental Engineering
Físico-Química Ciencia de los Polímeros Electroquímica Health Toxicology and Mutagenesis Hydrocharitaceae Arsenic Aquatic organisms Diffusion Physical Phenomena Botany Environmental Chemistry Groundwater KINETICS Vallisneria gigantea Chemistry CHLOROPHYLL EMISSION Ciencias Químicas Public Health Environmental and Occupational Health Biosorption BIOACCUMULATION General Medicine General Chemistry Hydrogen-Ion Concentration Models Theoretical Pollution Reflectivity REFLECTANCE Kinetics Adsorption CIENCIAS NATURALES Y EXACTAS Water Pollutants Chemical |
| Zdroj: | Chemosphere. 138:383-389 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2015.06.053 |
| Popis: | 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 kg1 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 1 mg As per week. Fil: Iriel, Analia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Unidad Ejecutora de Investigaciones En Produccion Animal; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Centro de Estudios Transdisciplinarios del Agua; Argentina Fil: Lagorio, María Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de Los Materiales, Medioambiente y Energía; Argentina Fil: Fernandez Cirelli, Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Unidad Ejecutora de Investigaciones En Produccion Animal; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Centro de Estudios Transdisciplinarios del Agua; Argentina |
| Databáze: | OpenAIRE |
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