Temporal and seasonal variability of arsenic in drinking water wells in Matlab, southeastern Bangladesh: a preliminary evaluation on the basis of a 4 year study.


Bhattacharya, P; Hossain, M; Rahman, SN; Robinson, C; Nath, B; Rahman, M; Islam, MM; Von Brömssen, M; Ahmed, KM; Jacks, G; Chowdhury, D; Rahman, M; Jakariya, M; Persson, L.Å, ; Vahter, M; (2011) Temporal and seasonal variability of arsenic in drinking water wells in Matlab, southeastern Bangladesh: a preliminary evaluation on the basis of a 4 year study. Journal of environmental science and health Part A, Toxic/hazardous substances & environmental engineering, 46 (11). pp. 1177-84. ISSN 1093-4529 DOI: https://doi.org/10.1080/10934529.2011.598768

Full text not available from this repository.

Abstract

Temporal and seasonal variability of As concentrations in groundwater were evaluated in As-affected areas of Matlab, southeastern Bangladesh. Groundwater samples from 61 randomly selected tubewells were analyzed for As concentrations over a period of three years and four months (from July 2002 to November 2005) and monitored seasonally (three times a year). The mean As concentrations in the sampled tubewells decreased from 153 to 123 μg/L during July 2002 to November 2005. Such changes were pronounced in tubewells with As concentration >50 μg/L than those with As concentrations <50 μg/L. Similarly, individual wells revealed temporal variability, for example some wells indicated a decreasing trend, while some other wells indicated stable As concentration during the monitoring period. The mean As concentrations were significantly higher in Matlab North compared with Matlab South. The spatial variations in the mean As concentrations may be due to the differences in local geological conditions and groundwater flow patterns. The variations in mean As concentrations were also observed in shallow (<40 m) and deep (>40 m) wells. However, to adequately evaluate temporal and seasonal variability of As concentration, it is imperative to monitor As concentrations in tubewells over a longer period of time. Such long-term monitoring will provide important information for the assessment of human health risk and the sustainability of safe drinking water supplies.

Item Type: Article
Faculty and Department: Faculty of Infectious and Tropical Diseases > Dept of Disease Control
PubMed ID: 21879850
Web of Science ID: 295716900003
URI: http://researchonline.lshtm.ac.uk/id/eprint/3613421

Statistics


Download activity - last 12 months
Downloads since deposit
0Downloads
31Hits
Accesses by country - last 12 months
Accesses by referrer - last 12 months
Impact and interest
Additional statistics for this record are available via IRStats2

Actions (login required)

Edit Item Edit Item