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dc.contributor.authorVan Halem, Doris
dc.contributor.authorHeijman, Bas G J
dc.contributor.authorJohnston, Richard Bart
dc.contributor.authorHuq, Imamul M.
dc.contributor.authorGhosh, Sanchari K.
dc.contributor.authorVerberk, Jasper Q J C
dc.contributor.authorAmy, Gary L.
dc.contributor.authorVan Dijk, Johannis C.
dc.date.accessioned2015-08-02T09:15:12Z
dc.date.available2015-08-02T09:15:12Z
dc.date.issued2010-12
dc.identifier.citationVan Halem, D., Heijman, S. G. J., Johnston, R., Huq, I. M., Ghosh, S. K., Verberk, J. Q. J. C., … van Dijk, J. C. (2010). Subsurface iron and arsenic removal: low-cost technology for community-based water supply in Bangladesh. Water Science and Technology, 62(11), 2702–2709. doi:10.2166/wst.2010.463
dc.identifier.issn02731223
dc.identifier.pmid21099059
dc.identifier.doi10.2166/wst.2010.463
dc.identifier.urihttp://hdl.handle.net/10754/561605
dc.description.abstractThe principle of subsurface or in situ iron and arsenic removal is that aerated water is periodically injected into an anoxic aquifer through a tube well, displacing groundwater containing Fe(II). An oxidation zone is created around the tube well where Fe(II) is oxidised. The freshly formed iron hydroxide surfaces provide new sorption sites for soluble Fe(II) andarsenic. The system's efficiency is determined based on the ratio between abstracted volume with reduced iron/arsenic concentrations (V) and the injected volume (Vi). In the field studypresented in this paper, the small-scale application of this technology was investigated in rural Bangladesh. It was found that at small injection volumes (>1m3) iron removal was successful and became more effective with every successive cycle. For arsenic, however, the system did not prove to be very effective yet. Arsenic retardation was only limited and breakthrough of 10mg/L (WHO guideline) was observed before V/Vi = 1, which corresponds to arrival of groundwater at the well. Possible explanations for insufficient arsenic adsorption are the short contact times within the oxidation zone, and the presence of competing anions, like phosphate. © IWA Publishing 2010.
dc.publisherIWA Publishing
dc.subjectArsenic
dc.subjectBangladesh
dc.subjectCommunity-based
dc.subjectDrinking water
dc.subjectIron
dc.subjectSubsurface
dc.titleSubsurface iron and arsenic removal: Low-cost technology for community-based water supply in Bangladesh
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalWater Science and Technology
dc.contributor.institutionFaculty of Civil Engineering and Geosciences, Delft University of Technology, Netherlands
dc.contributor.institutionUNESCO-IHE, Netherlands
dc.contributor.institutionDepartment of Water and Sanitation in Developing Countries (Sandec), Eawag: Swiss Federal Institute of Aquatic Science and Technology, Switzerland
dc.contributor.institutionDepartment of Public Health Engineering, Bangladesh
kaust.personAmy, Gary L.


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