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Arsenate Retention by Epipsammic Biofilms Developed on Streambed Sediments: Influence of Phosphate
Joint Authors
Prieto, D. M.
Devesa-Rey, R.
Rubinos, D. A.
Díaz-Fierros, F.
Barral, M. T.
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-09-24
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Natural geological conditions together with the impact of human activities could produce environmental problems due to high As concentrations.
The aim of this study was to assess the role of epipsammic biofilm-sediment systems onto As (V) sorption and to evaluate the effect of the presence of equimolar P concentrations on As retention.
A natural biofilm was grown on sediment samples in the laboratory, using river water as nutrient supplier.
Sorption experiments with initial As concentrations 0, 5, 25, 50, 100, 250, and 500 μg L−1 were performed.
The average percentage of As sorbed was 78.9±3.5 and 96.9±6.6% for the sediment and biofilm-sediment systems, respectively.
Phosphate decreased by 25% the As sorption capactity in the sediment devoid of biofilm, whereas no significant effect was observed in the systems with biofilm.
Freundlich, Sips, and Toth models were the best to describe experimental data.
The maximum As sorption capacity of the sediment and biofilm-sediment systems was, respectively, 6.6 and 6.8 μg g−1 and 4.5 and 7.8 μg g−1 in the presence of P.
In conclusion, epipsammic biofilms play an important role in the environmental quality of river systems, increasing As retention by the system, especially in environments where both As and P occur simultaneously.
American Psychological Association (APA)
Prieto, D. M.& Devesa-Rey, R.& Rubinos, D. A.& Díaz-Fierros, F.& Barral, M. T.. 2013. Arsenate Retention by Epipsammic Biofilms Developed on Streambed Sediments: Influence of Phosphate. BioMed Research International،Vol. 2013, no. 2013, pp.1-10.
https://search.emarefa.net/detail/BIM-1004677
Modern Language Association (MLA)
Prieto, D. M.…[et al.]. Arsenate Retention by Epipsammic Biofilms Developed on Streambed Sediments: Influence of Phosphate. BioMed Research International No. 2013 (2013), pp.1-10.
https://search.emarefa.net/detail/BIM-1004677
American Medical Association (AMA)
Prieto, D. M.& Devesa-Rey, R.& Rubinos, D. A.& Díaz-Fierros, F.& Barral, M. T.. Arsenate Retention by Epipsammic Biofilms Developed on Streambed Sediments: Influence of Phosphate. BioMed Research International. 2013. Vol. 2013, no. 2013, pp.1-10.
https://search.emarefa.net/detail/BIM-1004677
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1004677