B. Petruševski, Saroj Sharma, Kathleen Shordt, Jan C. Schippers et al.
Arsenic in drinking water: not just a problem for Bangladesh D. van Halem, S. A. Bakker, G. L. Amy, and J. C. van Dijk Delft University of Technology, Faculty of Civil Engineering and Geosciences, Stevinweg 1, 2628 CN Delft, The Netherlands UNESCO-IHE, Westvest 7, 2611 AX Delft, The Netherlands Rece...
J.M. McArthur, Peter Ravenscroft, S. Safiulla, M. F. Thirlwall
In the deltaic plain of the Ganges‐Meghna‐Brahmaputra Rivers, arsenic concentrations in groundwater commonly exceed regulatory limits (>50 µg L −1 ) because FeOOH is microbially reduced and releases its sorbed load of arsenic to groundwater. Neither pyrite oxidation nor competitive exchange with ...
C.A.J. Appelo, M. J. J. Van Der Weiden, Christophe Tournassat, Laurent Charlet
Surface complexation models are commonly used to predict the mobility of trace metals in aquifers. For arsenic in groundwater, surface complexation models cannot be used because the database is incomplete. Both carbonate and ferrous iron are often present at a high concentration in groundwater and w...
Prosun Bhattacharya, Alan H. Welch, Kenneth G. Stollenwerk, Mike J. McLaughlin et al.
Arsenic (As) distribution and toxicology in the environment is a serious issue, with millions of individuals worldwide being affected by As toxicosis. Sources of As contamination are both natural and anthropogenic and the scale of contamination ranges from local to regional. There are many areas of ...
Linda C. Roberts, Stephan J. Hug, Thomas Ruettimann, Md Morsaline Billah et al.
Arsenic removal by passive treatment, in which naturally present Fe(II) is oxidized by aeration and the forming iron(III) (hydr)oxides precipitate with adsorbed arsenic, is the simplest conceivable water treatment option. However, competing anions and low iron concentrations often require additional...
Juerg Zobrist, Philip R. Dowdle, James Davis, Ronald S. Oremland
Sulfurospirillum barnesii is capable of anaerobic growth using ferric iron or arsenate as electron acceptors. Cell suspensions of S. barnesii were able to reduce arsenate to arsenite when the former oxyanion was dissolved in solution, or when it was adsorbed onto the surface of ferrihydrite, a commo...
Christopher H. Swartz, Nicole Blute, Borhan Badruzzman, Ashraf Ali et al.
Heather Lowers, George N. Breit, Andrea L. Foster, John W. Whitney et al.
Alexander van Geen, Jérôme Rose, Sophie Thoral, Jérémie Garnier et al.
Junji Akai, Kaoru Izumi, Haruo Fukuhara, Harue Masuda et al.
Mohammad Amir Hossain Bhuiyan, Mohammad Amirul Islam, Samuel B. Dampare, Lutfar Parvez et al.
An integrated approach of pollution evaluation indices, principal component analysis (PCA) and cluster analysis (CA) was employed to evaluate the intensity and sources of pollution in irrigation and drinking water systems of northwestern Bangladesh. Temperature, BOD, chemical oxygen demand (COD), Mn...
Natalie Mladenov, Yan Zheng, Matthew P. Miller, Diana R. Nemergut et al.
Iron (Fe) and dissolved organic matter (DOM) cycling have been implicated in arsenic mobilization via microbially mediated Fe oxide reduction. To evaluate the sources and multiple roles of DOM in Bangladesh aquifers, we conducted spectroscopic analyses on various types of surface water and groundwat...
Zinnat A. Begum, Ismail M.M. Rahman, Yousuke Tate, Hikaru Sawai et al.
Ex situ soil washing with synthetic extractants such as, aminopolycarboxylate chelants (APCs) is a viable treatment alternative for metal-contaminated site remediation. EDTA and its homologs are widely used among the APCs in the ex situ soil washing processes. These APCs are merely biodegradable and...
Mohammad Mahmudur Rahman, Debapriyo Mukherjee, Mrinal Kumar Sengupta, Uttam Kumar Chowdhury et al.
The exposure of millions to arsenic contaminated water from hand tube wells is a major concern in many Asiatic countries. Field kits are currently used to classify tube wells as delivering arsenic below 50 microg/L (the recommended limit in developing countries) as safe, painted green or above 50 mi...
Paul N. Williams, Hao Zhang, William Davison, Andrew A. Meharg et al.
Agroecological zones within Bangladesh with low levels of arsenic in groundwater and soils produce rice that is high in arsenic with respect to other producing regions of the globe. Little is known about arsenic cycling in these soils and the labile fractions relevant for plant uptake when flooded. ...