A review of arsenic (III) in groundwater

Korte, Nic; Fernaǹdo, Quintus

doi:10.1080/10643389109388408

Cited by 442 publications

(224 citation statements)

References 105 publications

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“…The low Mn content of the soil apparently seems to be inconsistent with the strong decrease of the Mn concentration in the slack water, which would imply a similar behaviour to Fe, with a considerable enrichment in the upper soil layers. This may be explained by the difference in the redox behaviour of the two elements, Mn(IV) being reduced at a higher redox potential than required for Fe, even before the complete consumption of dissolved O 2 (Korte and Fernando, 1991). Consequently, Mn-oxyhydroxides precipitated from the water are almost completely leached from the upper soil and transported downwards into deeper soil horizons.…”

Section: Sequential Extraction Experimentsmentioning

confidence: 99%

Impact of irrigation with As rich groundwater on soil and crops: A geochemical case study in West Bengal Delta Plain, India

Norra

Berner

Agarwala

et al. 2005

Applied Geochemistry

214

126

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Section: Sequential Extraction Experimentsmentioning

confidence: 99%

Impact of irrigation with As rich groundwater on soil and crops: A geochemical case study in West Bengal Delta Plain, India

Norra

Berner

Agarwala

et al. 2005

Applied Geochemistry

214

126

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“…[1][2][3][4] The source of arsenic is the special underground geochemical condition by which arsenic is mobilized as soluble species in the groundwater, primarily, mobilization by dissolution within the sediment by virtual quantitative reduction of As(V) to As(III). [5][6][7][8] Groundwater is the primary source of drinking water for millions of people in Bangladesh and neighboring India. It is mostly pumped out by hand-operated tubewells (with a metal casing) from 30-200 feet underground.…”

Section: Introductionmentioning

confidence: 99%

Chemical Fate of Arsenic and Other Metals in Groundwater of Bangladesh: Experimental Measurement and Chemical Equilibrium Model

Hussam

Habibuddowla²,

Alauddin

et al. 2003

Journal of Environmental Science and Health, Part A

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The presence of toxic level of inorganic arsenic in groundwater used for drinking in Bangladesh and neighboring India is unfolding as one of the worst natural disaster in the region. The purpose of this work is to ascertain the chemical fate of arsenic and other metals in groundwater of Bangladesh. A combination of techniques was used to measure 24 metals, 6 anions, E h , pH, dissolved oxygen, conductivity, and temperature to understand the distribution of components which were then used in computational chemical equilibrium model, MINEQLþ, for detailed speciation. It was found that the fate of arsenic and its speciation were inextricably linked to the formation of hydrous ferric oxide (HFO) and its kinetic. The HFO induced natural attenuation removes 50-75% of total arsenic in first 24 h through a first order kinetics. Adsorption on HFO is the predominant mode of removal of arsenic, MARCEL DEKKER, INC. • 270 MADISON AVENUE • NEW YORK, NY 10016iron, manganese, and most trace metals. The equilibrium model points to the presence of excess active sites for the removal of arsenic. MINEQLþ shows that significantly higher concentration of HFO forming iron is required to remove arsenic below maximum contamination level (MCL) of 50 mg/L than predicted by stoichiometry. The practical implication of this work is the prediction of water quality based on models.

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“…As(III) is the dominant arsenic species in groundwater, while As(V) is the main arsenic species in surface water. The toxicity of As(III) is about 25-60 times higher than that of As(V) [9], and it is more difficult to remove As(III) than that of As(V), because the adsorption capacity of As(III) is quite lower than that of As(V). Thus, a pretreatment for As(III) oxidation to As(V) before adsorption process is required for its effective removal from water [10].…”

Section: Introductionmentioning

confidence: 99%

TiO2 incorporated in magnetic mesoporous SBA-15 by a facile inner-pore hydrolysis process toward enhanced adsorption–photocatalysis performances for As(III)

Yang

Wang

2015

Journal of Colloid and Interface Science

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ed to a synergistic photocatalytic oxidation and adsorption of As(III). It was found that the prepared nanocomposites had mesoporous structure, large specific surface area, high pore volume and superparamagetism according to SEM/TEM, N 2 adsorption-desorption isotherms, XRD and VSM analysis. Experimental results show that SBA-15/c-Fe 2 O 3 -TiO 2 can oxidize As(III) to As(V) efficiently in the photocatalysis reaction. At the same time, As(V) is effectively removed through adsorption by the composites. In addition, with the treatment of alkali solution, As(V) can be easily desorbed from SBA-15/c-Fe 2 O 3 -TiO 2 . After reusage for 5 times, the composites still retain comparable catalysis and adsorption performance compared with that of first use, revealing the excellent stability of the composites.

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A review of arsenic (III) in groundwater

Cited by 442 publications

References 105 publications

Impact of irrigation with As rich groundwater on soil and crops: A geochemical case study in West Bengal Delta Plain, India

Impact of irrigation with As rich groundwater on soil and crops: A geochemical case study in West Bengal Delta Plain, India

Chemical Fate of Arsenic and Other Metals in Groundwater of Bangladesh: Experimental Measurement and Chemical Equilibrium Model

TiO2 incorporated in magnetic mesoporous SBA-15 by a facile inner-pore hydrolysis process toward enhanced adsorption–photocatalysis performances for As(III)

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