A. Horneman, Alexander van Geen, Dennis V. Kent, Pierre-Étienne Mathé et al.
Yan Zheng, M. Stute, Alexander van Geen, Ittai Gavrieli et al.
Ratan Dhar, Bhajan Kumar Biswas, G. Samanta, Badal Kumar Mandal et al.
Alexander van Geen, Yan Zheng, Roelof Versteeg, M. Stute et al.
Arsenic concentrations measured by graphite furnace atomic absorption range from < 5 to 900 μg/L in groundwater pumped from 6000 wells within a 25 km 2 area of Bangladesh. The proportion of wells that exceed the Bangladesh standard for drinking water of 50 μg/L arsenic increases with depth from 2...
Dipankar Chakraborti, Mohammad Mahmudur Rahman, Bhaskar Das, Matthew Murrill et al.
Since 1996, 52,202 water samples from hand tubewells were analyzed for arsenic (As) by flow injection hydride generation atomic absorption spectrometry (FI-HG-AAS) from all 64 districts of Bangladesh; 27.2% and 42.1% of the tubewells had As above 50 and 10 μg/l, respectively; 7.5% contained As above...
Alexander van Geen, Habibul Ahsan, A. Horneman, Ratan Dhar et al.
OBJECTIVE: To survey tube wells and households in Araihazar upazila, Bangladesh, to set the stage for a long-term epidemiological study of the consequences of chronic arsenic exposure. METHODS: Water samples and household data were collected over a period of 4 months in 2000 from 4997 contiguous tub...
Yan Zheng, Alexander van Geen, M. Stute, Ratan Dhar et al.
M. Stute, Yan Zheng, Peter Schlösser, A. Horneman et al.
The elevated arsenic (As) content of groundwater from wells across Bangladesh and several other South Asian countries is estimated to slowly poison at least 100 million people. The heterogeneous distribution of dissolved arsenic in the subsurface complicates understanding of its release from the sed...
Ratan Dhar, Yan Zheng, M. Stute, Alexander van Geen et al.
Samples were collected every 2-4 weeks from a set of 37 monitoring wells over a period of 2-3 years in Araihazar, Bangladesh, to evaluate the temporal variability of groundwater composition for As and other constituents. The monitoring wells are grouped in 6 nests and span the 5-91 m depth range. Co...
Faruque Parvez, Yu Chen, Maria Argos, A.Z.M. Iftikhar Hussain et al.
We conducted a population-based prevalence survey in Araihazar, Bangladesh, to describe the distribution of arsenic exposure in a rural Bangladeshi population and to assess the population's awareness to this problem as well as to possible remediation options. Water samples from 5,967 contiguous tube...
Alexander van Geen, Yan Zheng, Zhongqi Cheng, Yi He et al.
Soil and soil-water As profiles were obtained from 4 rice paddies in Bangladesh during the wet growing season (May-November), when surface water with little arsenic is used for irrigation, or during the dry season (January-May), when groundwater elevated in arsenic is used instead. In the upper 5 cm...
Alexander van Geen, Yan Zheng, Zhongqi Cheng, Z. Aziz et al.
Ratan Dhar, Yan Zheng, Chad Saltikov, K. A. Radloff et al.
Dissimilatory metal-reducing bacteria can mobilize As, but few studies have studied such processes in deeper orange-colored Pleistocene sands containing 1-2 mg kg(-1) As that are associated with low-As groundwater in Bangladesh. To address this gap, anaerobic incubations were conducted in replicate ...
Md. Monirul Islam, Arifa Jannat, Aurup Ratan Dhar, Tofael Ahamed
Aurup Ratan Dhar, Md. Taj Uddin, Mrinal Kanti Roy
The study assessed the economic, environmental and sustainability issues of organic shrimp farming in Bangladesh. Following stratified random sampling technique, 60 farmers were interviewed from several villages of Assasuni upazila under Satkhira district. The study revealed that productivity of org...