GEOSCAN, résultats de la recherche


TitreArsenic contamination in Bangladesh - an overview
AuteurHossain, M F
SourceAgriculture, Ecosystems and Environment vol. 113, issue 1-4, 2006 p. 1-16,
Séries alt.Ressources naturelles Canada, Contribution externe 20181010
ÉditeurElsevier BV
Documentpublication en série
Mediapapier; en ligne; numérique
Lat/Long OENS 88.0000 92.7500 26.6833 20.3833
Sujetstélédétection; géochimie de l'eau; qualité de l'eau; géochimie de l'arsenic; pollution; substances polluantes; eau souterraine; ressources en eau souterraine; pollution de l'eau souterraine; sols; humidité du sol; puits d'eau; risque pour l'environnement; santé; risque pour la santé; eau potable; irrigation; disponibilités alimentaires; salubrité des aliments; plante; effets cumulatifs; hydrogéologie; géophysique; géochimie; Nature et environnement; Agriculture; Santé et sécurité; Sciences et technologie
ProgrammeDirection du Centre canadien de télédétection
Diffusé2005 10 26
Résumé(disponible en anglais seulement)
Bangladesh is currently facing a serious threat to public health, with 85 million people at risk from arsenic (As) in drinking water and in food crops. In Bangladesh, the groundwater As contamination problem is the worst in the world. Ninety-seven percent of the population in the country uses groundwater for drinking and domestic purposes as surfacewater is mismanaged. High levels of As in groundwater are causing widespread poisoning in Bangladesh. Different studies have addressed various aspects of the As issue in Bangladesh. This review is undertaken to give an overview of the latest findings and statistical data on the issue especially on soil, water and food cycle. The World Health Organization (WHO) recommends a safe limit for As in drinking water of 10 micrograms/L. A recent survey looked at the As concentrations of drinking water from deep wells in 64 districts in the country and found that 59 had concentrations >10 micrograms/L and 43 had concentrations >50 micrograms/L. Contaminated groundwater is also used for irrigation of paddy rice, which is the main staple food for the population. This practice enhances the level of As in the soils rendering them unsuitable for agriculture. A few recent studies have reported that 85-95% of total As in rice and a vegetable was inorganic, which outlines the need for more studies for standardization. Arsenic concentration is higher in Bangladeshi soils, groundwater and plants (data based on 4% area of the country) than the permissible limits or normal range reported. This situation poses a serious threat on human and livestock health and highlights the need for scientific studies that would better describes the fate of As in the natural environment and identify all potential routes of exposure.