Role of competing ions in the mobilization ofarsenic in groundwater of Bengal Basin: insight from surface complexation modeling
Article
Article Title | Role of competing ions in the mobilization ofarsenic in groundwater of Bengal Basin: insight from surface complexation modeling |
---|---|
ERA Journal ID | 4694 |
Article Category | Article |
Authors | Biswas, Ashis (Author), Gustafsson, Jon Petter (Author), Neidhardt, Harald (Author), Halder, Dipti (Author), Kundu, Amit K. (Author), Chatterjee, Debashis (Author), Berner, Zsolt (Author) and Bhattacharya, Prosun (Author) |
Journal Title | Water Research |
Journal Citation | 55, pp. 30-39 |
Number of Pages | 10 |
Year | 2014 |
Place of Publication | United Kingdom |
ISSN | 0043-1354 |
1879-2448 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.watres.2014.02.002 |
Web Address (URL) | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896893120&doi=10.1016%2fj.watres.2014.02.002&partnerID=40&md5=e140ee610db0c587b60aea5da864078d |
Abstract | This study assesses the role of competing ions in the mobilization of arsenic (As) by surface complexation modeling of the temporal variability of As in groundwater. The potential use of two different surface complexation models (SCMs), developed for ferrihydrite and goethite, has been explored to account for the temporal variation of As(III) and As(V) concentration, monitored in shallow groundwater of Bengal Basin over a period of 20 months. The SCM for ferrihydrite appears as the better predictor of the observed variation in both As(III) and As(V) concentrations in the study sites. It is estimated that among thecompeting ions, PO43- is the major competitor of As(III) and As(V) adsorption onto Feoxyhydroxide, and the competition ability decreases in the order PO43-≫Fe(II)>H4SiO4=HCO3 It is further revealed that a small change in pH can also have a significant effect on the mobility of As(III) and As(V) in the aquifers. A decrease in pH increases the concentration of As(III), whereas it decreases the As(V) concentration and vice versa. The present study suggests that the reductive dissolution of Fe oxyhydroxide alone cannot explain the observed high As concentration in groundwater of the Bengal Basin. This study supports the view that the reductive dissolution of Fe oxyhydroxide followed by competitive sorption reactions with the aquifer sediment is the processes responsible for As enrichment in groundwater. © 2014 Elsevier Ltd. |
Keywords | arsenic mobilization; Bengal Basin; competing ions; groundwater; surface complexation modeling; temporal variability; competition ability; competitive sorption; reductive dissolution; surface complexation models; Aquifers; Arsenic; Dissolution; Hydrogeology; Ions; Iron compounds; Groundwater resources; ferric hydroxide; ground water; ion; ferric ion; water pollutant; aquifer; basin; complexation; enrichment; ferrihydrite; goethite; mobilization; modeling; surface; temporal variation; adsorption; analytical parameters; article; binding competition; chemical procedures; complex formation; pH; priority journal; surface complexation model; surface property; analysis; chemistry; environmental monitoring; theoretical model; Bengal; Ferric Compounds; Hydrogen-Ion Concentration; Models, Theoretical; Water Pollutants, Chemical |
ANZSRC Field of Research 2020 | 419999. Other environmental sciences not elsewhere classified |
370799. Hydrology not elsewhere classified | |
410404. Environmental management | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | KTH Royal Institute of Technology, Sweden |
Karlsruhe Institute of Technology, Germany | |
University of Kalyani, India | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5242/role-of-competing-ions-in-the-mobilization-ofarsenic-in-groundwater-of-bengal-basin-insight-from-surface-complexation-modeling
190
total views9
total downloads1
views this month0
downloads this month