Arsenic Mobility and Groundwater Extraction in Bangladesh

  title={Arsenic Mobility and Groundwater Extraction in Bangladesh},
  author={Charles Franklin Harvey and Christopher H. Swartz and Abu Borhan Md. Badruzzaman and Nicole Keon-Blute and Winston Yu and M. Ashraf Ali and Jennifer Ayla Jay and Roger D. Beckie and Volker Niedan and D Oates P Brabander and Peter M. Oates and Khandaker N. Ashfaque and Shafiqul Islam and Harold F. Hemond and M. Feroze Ahmed},
  pages={1602 - 1606}
High levels of arsenic in well water are causing widespread poisoning in Bangladesh. In a typical aquifer in southern Bangladesh, chemical data imply that arsenic mobilization is associated with recent inflow of carbon. High concentrations of radiocarbon-young methane indicate that young carbon has driven recent biogeochemical processes, and irrigation pumping is sufficient to have drawn water to the depth where dissolved arsenic is at a maximum. The results of field injection of molasses… 

Anthropogenic influences on groundwater arsenic concentrations in Bangladesh

The origin of dissolved arsenic in the Ganges Delta has puzzled researchers ever since the report of widespread arsenic poisoning two decades ago. Today, microbially mediated oxidation of organic

Bacterial sulfate reduction limits natural arsenic contamination in groundwater

Natural arsenic contamination of groundwater, increasingly recognized as a threat to human health worldwide, is characterized by arsenic concentrations that vary sharply over short distances.

The Arsenic Contamination of Drinking and Groundwaters in Bangladesh: Featuring Biogeochemical Aspects and Implications on Public Health

  • M. Raessler
  • Environmental Science
    Archives of Environmental Contamination and Toxicology
  • 2018
Arsenic is being dissolved from the aquifer by biogeochemical processes that are fueled by the presence of high amounts of organics in the Bengal delta sediments, which was not encountered at the time due to a lack of chemical analyses of the waters.

Arsenic Contamination in Groundwater of Bangladesh: Perspectives on Geochemical, Microbial and Anthr

Abstract: A groundwater, sediment and soil chemistry and mineralogical study has been performed to investigate the sources and mobilization process of Arsenic (As) in shallow aquifers of Bangladesh.

Arsenic attenuation by oxidized aquifer sediments in Bangladesh.

Processes conducive to the release and transport of arsenic into aquifers of Bangladesh.

Influx of sediment and redox cycling provide a long-term source of arsenic that when liberated in the near surface is only weakly partitioned onto sediments deeper in the profile and is transported through aquifers by groundwater recharge.

Hydrological control of As concentrations in Bangladesh groundwater

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

Arsenic occurrence in groundwater in South and East Asia

The detrimental health effects of environmental exposure to arsenic have become increasingly clear in the last few years. Drinking water constitutes one of the principal pathways of environmental



Arsenic poisoning of Bangladesh groundwater

Sedimentological study of the Ganges alluvial sediments shows that the arsenic derives from the reductive dissolution of arsenic-rich iron oxyhydroxides, which in turn are derived from weathering of base-metal sulphides.

Arsenic in groundwater: Testing pollution mechanisms for sedimentary aquifers in Bangladesh

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

Nitrate Controls on Iron and Arsenic in an Urban Lake

Nitrate, a common aquatic pollutant, strongly influenced the cycling of arsenic (As) under anoxic conditions in urban Upper Mystic Lake by oxidizing ferrous iron [Fe(II)] to produce As-sorbing particulate hydrous ferric oxides and causing the more oxidized As(V), which is more particle-reactive than As(III) under these conditions, to dominate.

Arsenic poisoning in the Ganges delta

From the analysis of thousands of samples of water and sediment, the course of events proposed by Nickson et al. to account for the poisoning of Bangladesh groundwater are tested.

Contamination of drinking-water by arsenic in Bangladesh: a public health emergency.

The experience in Bangladesh shows that groundwater sources throughout the world that are used for drinking-water should be tested for arsenic, and the fundamental intervention is the identification and provision of arsenic-free drinking water.

Validation of an arsenic sequential extraction method for evaluating mobility in sediments.

The proportional distribution of As among extractant pools was consistent for subs samples of the wetland and for subsamples of the riverbed sediments, and intermethod variability between the sequential extraction procedure and a single-step hot concentrated HNO3/H2O2 acid digestion was investigated.

Surface complexation of ferrous iron and carbonate on ferrihydrite and the mobilization of arsenic.

Model calculations confirm that sorption of particularly carbonate at common soil and groundwater concentrations reduces the sorption capacity of arsenic on ferrihydrite significantly, a cause for the high concentrations of arsenic in groundwater in Bangladesh.

Groundwater flow in the Ganges Delta.

It is shown that this estimate of flow could have important consequences for the interpretation of the Ganges-Brahmaputra river system.