Status of groundwater arsenic contamination in Bangladesh: A 14-year study report

Chakraborti, Dipankar; Rahman, Mohammad Mahmudur; Das, Bhaskar; Murrill, Matthew; Dey, Sourav; Mukherjee, Subhas; Dhar, Ratan; Biswas, Bhajan Kumar; Chowdhury, Uttam Kumar; Roy, Swarnil; Sorif, Shahariar; Selim, M. A. E.; Rahman, Mahmuder; Quamruzzaman, Quazi

doi:10.1016/j.watres.2010.06.051

Cited by 279 publications

(157 citation statements)

References 22 publications

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“…Arsenic is a slow poison and symptoms of arsenic poisoning develop only after prolonged consumption. The presence of arsenic in tissues of the control goats may be due to the consumption of food and water contaminated with traces of this element, which is universally distributed in Bangladesh (9). Accumulation of high arsenic residues in tissues of arsenic-treated goats may be due to repeated doses.…”

Section: Discussionmentioning

confidence: 99%

Effects of spirulina in arsenic poisoning in the Black Bengal goat

Ghosh¹,

Awal²,

Khan³

et al. 2014

Turk J Vet Anim Sci

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the uplift of the CAP margins started (Yildirim et al. 2011;Cosentino et al. 2012;Schildgen et al. 2012). Here we describe the type section of the Tuğlu Formation, a sequence exceptionally rich in fossils. The section has been sampled for micropalaeontological (ostracods, foraminifera, pollen, Characeae), palaeontological (molluscs, small mammals, fish remains), environmental magnetism, and stable carbon and oxygen isotope analyses (on ostracods and bulk sediment samples) as well as strontium isotope analyses (on ostracods and foraminifera) and major elements composition of the sediments. Through a highly multidisciplinary approach, we document the Abstract: The Çankırı Basin, located in the northern part of the Central Anatolian Plateau, is a large Tertiary basin where thick Miocene to Quaternary continental sediments overlay the Cretaceous-Tertiary units. This investigation focuses on the Tuğlu Formation, an Upper Miocene succession mainly composed of dark grey silty and organic rich clays. The type section of Tuğlu has been sampled for an array of multidisciplinary analyses. The palaeontological proxies included ostracod, foraminifer, nannoplankton, pollen, molluscs, charophytes, small mammal assemblages, fish, and crab remains. The abiotic parameters studied were: palaeomagnetism and environmental magnetism, stable carbon and oxygen isotope ratios (on ostracods and bulk sediment samples), strontium isotope ratios (on ostracods and foraminifera), and major elemental composition of the sediments. All analysed proxies point to a continental setting characterised by permanent water bodies affected by strong salinity oscillations. A shallow saline lake developed in a permanent freshwater lake. Barren layers, potentially linked to a short subaerial exposure, mark the end of the saline lake and the transition to a fluvial environment. Geochemical analysis confirms aridity-humidity oscillations as recorded by the micropalaeontological proxies. Analysis of small mammal assemblages refined the chronology of the Tuğlu Formation, with the onset of the deposition at the base of the mammal zone MN9 (around 11 Ma) and continuous deposition until the MN11 zone (around 8 Ma). The stable oxygen isotope records from the Tuğlu section point to Miocene δ 18 O water values consistent with subdued topography where no prominent mountain belts were yet developed at the northern plateau margin. If correct, this suggests that at least until the end of the deposition of the Tuğlu Formation, the Çankırı Basin did not yet experience rain shadow conditions, and the regional surface uplift of the area most likely occurred after 8 Ma.

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Section: Discussionmentioning

confidence: 99%

Effects of spirulina in arsenic poisoning in the Black Bengal goat

Ghosh¹,

Awal²,

Khan³

et al. 2014

Turk J Vet Anim Sci

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“…Acharyya and Shah [255] report that 9.5 million persons have been affected by high concentrations of arsenic in drinking water in nine districts in southern West Bengal. Based on an extensive, 14-year study of tubewells in Bangladesh, Chakraborti et al [256] suggest that as many as 36 million and 22 million residents might be drinking water from wells with arsenic concentrations in excess of 10 µg per liter and 50 µg per liter, respectively. The latter concentration is the current national drinking water standard for arsenic in Bangladesh, which several authors suggest is not sufficiently restrictive [257][258][259].…”

Section: Reducing Arsenic Uptakementioning

confidence: 99%

Managing Water and Soils to Achieve Adaptation and Reduce Methane Emissions and Arsenic Contamination in Asian Rice Production

Wichelns

2016

Water

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Rice production is susceptible to damage from the changes in temperature and rainfall patterns, and in the frequency of major storm events that will accompany climate change. Deltaic areas, in which millions of farmers cultivate from one to three crops of rice per year, are susceptible also to the impacts of a rising sea level, submergence during major storm events, and saline intrusion into groundwater and surface water resources. In this paper, I review the current state of knowledge regarding the potential impacts of climate change on rice production and I describe adaptation measures that involve soil and water management. In many areas, farmers will need to modify crop choices, crop calendars, and soil and water management practices as they adapt to climate change. Adaptation measures at the local, regional, and international levels also will be helpful in moderating the potential impacts of climate change on aggregate rice production and on household food security in many countries. Some of the changes in soil and water management and other production practices that will be implemented in response to climate change also will reduce methane generation and release from rice fields. Some of the measures also will reduce the uptake of arsenic in rice plants, thus addressing an important public health issue in portions of South and Southeast Asia. Where feasible, replacing continuously flooded rice production with some form of aerobic rice production, will contribute to achieving adaptation objectives, while also reducing global warming potential and minimizing the risk of negative health impacts due to consumption of arsenic contaminated rice.

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“…As is one of the most toxic ions found in drinking water [45,46]. Arsenic poisoning is more commonplace in continents from Southeast Asia, such as Bangladesh, Vietnam, and India [47][48][49][50]. Negative health impacts caused by As include respiratory issues, cardiovascular disease, diabetes, and skin and lungs cancers, and As poisoning is potentially fatal [51][52][53][54].…”

Section: Introductionmentioning

confidence: 99%

Density Functional Theory Study of Arsenate Adsorption onto Alumina Surfaces

2018

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Atomistic modeling of mineral-water interfaces offers a way of confirming (or refuting) experimental information about structure and reactivity. Molecular-level understanding, such as orbital-based descriptions of bonding, can be developed from charge density and electronic structure analysis. First-principles calculations can be used to identify weaknesses in empirical models. This provides direction on how to propose more robust representations of systems of increasing size that accurately represent the underlying physical factors governing reactivity. In this study, inner-sphere complex geometries of arsenate on hydrated alumina surfaces are modeled at the density functional theory (DFT)-continuum solvent level. According to experimental studies, arsenate binds to alumina surfaces in a bidentate binuclear (BB) fashion. While the DFT calculations support the preference of the BB configuration, the optimized geometries show distortion from the ideal tetrahedral geometry of the arsenic atom. This finding suggests that steric factors, and not just coordination arguments, influences reactivity. The O surf -As-O surf angle for the more favorable arsenate configurations is closest to the ideal tetrahedral angle of 109.5 • . Comparing the results of arsenate adsorption using a small cluster model with a periodic slab model, we report that the two model geometries yield results that differ qualitatively and quantitatively. This relates the steric factors and rigidity of the surface models.

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Status of groundwater arsenic contamination in Bangladesh: A 14-year study report

Cited by 279 publications

References 22 publications

Effects of spirulina in arsenic poisoning in the Black Bengal goat

Effects of spirulina in arsenic poisoning in the Black Bengal goat

Managing Water and Soils to Achieve Adaptation and Reduce Methane Emissions and Arsenic Contamination in Asian Rice Production

Density Functional Theory Study of Arsenate Adsorption onto Alumina Surfaces

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