Subsurface iron and arsenic removal: Low-cost technology for community-based water supply in Bangladesh
Type
ArticleAuthors
Van Halem, DorisHeijman, Bas G J
Johnston, Richard Bart
Huq, Imamul M.
Ghosh, Sanchari K.
Verberk, Jasper Q J C
Amy, Gary L.
Van Dijk, Johannis C.
KAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionEnvironmental Science and Engineering Program
Water Desalination and Reuse Research Center (WDRC)
Date
2010-12Permanent link to this record
http://hdl.handle.net/10754/561605
Metadata
Show full item recordAbstract
The 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.Citation
Van 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.2010.463Publisher
IWA PublishingJournal
Water Science and TechnologyPubMed ID
21099059ae974a485f413a2113503eed53cd6c53
10.2166/wst.2010.463
Scopus Count
Related articles
- Subsurface iron and arsenic removal for shallow tube well drinking water supply in rural Bangladesh.
- Authors: van Halem D, Olivero S, de Vet WW, Verberk JQ, Amy GL, van Dijk JC
- Issue date: 2010 Nov
- Oxidation and removal of arsenic (III) from aerated groundwater by filtration through sand and zero-valent iron.
- Authors: Leupin OX, Hug SJ
- Issue date: 2005 May
- Reactive transport modeling of subsurface arsenic removal systems in rural Bangladesh.
- Authors: Rahman MM, Bakker M, Patty CH, Hassan Z, Röling WF, Ahmed KM, van Breukelen BM
- Issue date: 2015 Dec 15
- Role of Fe(II), phosphate, silicate, sulfate, and carbonate in arsenic uptake by coprecipitation in synthetic and natural groundwater.
- Authors: Ciardelli MC, Xu H, Sahai N
- Issue date: 2008 Feb
- Effect of solution chemistry on arsenic sorption by Fe- and Al-based drinking-water treatment residuals.
- Authors: Nagar R, Sarkar D, Makris KC, Datta R
- Issue date: 2010 Feb