Remediation of inorganic arsenic in groundwater for safe water supply: A critical assessment of technological solutions

Mondal, Priyanka; Bhowmick, Subhamoy; Chatterjee, Debashis; Figoli, Alberto; Bruggen, Bart Van der

doi:10.1016/j.chemosphere.2013.01.097

Cited by 297 publications

(120 citation statements)

References 147 publications

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“…According to them, this public health problem in Yatenga linked to arsenic is due to drinking water. Indeed, they found that 52 % of the Removal efficiency is very low for As (III); high electrical energy needs to run the models; high operation and capital cost; pretreatment steps are often Harisha et al (2010); Mondal et al (2013) Reverse osmosis 0.2-0.5 mg L −1 99 % Gholami et al (2006); Mondal et al (2013) water samples exceeded the WHO guideline value (10 μg L −1 ) whilst no trace of arsenic was found in the samples of tomatoes, cabbages, and potatoes. Another publication (Nzihou et al 2013) has focused on the health risk related to medium-and long-term exposure to drinking water contaminated by arsenic.…”

Section: Health Hazard Linked To High-as Water In Africamentioning

confidence: 99%

Arsenic in African Waters: A Review

Ahoulé

Lalanne

Mendret

et al. 2015

Water Air Soil Pollut

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The review of studies on arsenic in African waters shows that arsenic can be found in high concentrations in both surface water and groundwater. Arsenic concentrations in African groundwater range between 0.02 and 1760 μg L −1 , whilst the level of arsenic in surface water is ranged up to 10,000 μg L −1 . This high level of arsenic in surface water is related to mining operations, agricultural drains, local sediments, disposal, and incineration of municipal and industrial wastes. However, mining activities remain the main source of surface water pollution. They have thereby a strong impact on the concentration of arsenic in the environment. As for groundwater, high levels of arsenic occur in natural conditions. It is due to the presence of iron oxides; sulphide minerals such as pyrite, arsenopyrite, and chalcopyrite; volcanic rocks; and geothermal waters. Few studies in Africa make the link between human health problems and high levels of arsenic in water. Only two articles were found dealing with arsenic remediation. This shows that arsenic, which constitutes a major public health issue in the world, has less interest in Africa although high concentrations of arsenic have been found in both surface water and groundwater in some African countries. Most of the studies carried out on arsenic issues in Africa are dedicated to the characterization and the quantification of the pollution, but studies on the risk to human health and treatment systems are limited. The arsenic issue in Africa needs special attention in order to avoid the problems experienced in some areas mainly in Asia.

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Section: Health Hazard Linked To High-as Water In Africamentioning

confidence: 99%

Arsenic in African Waters: A Review

Ahoulé

Lalanne

Mendret

et al. 2015

Water Air Soil Pollut

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“…Some methods, such as oxidation treatments by ozone or coagulation-flocculation, require the addition of chemical compounds that produce toxic or carcinogenic by-products. Filters based on activated carbon are not as efficient regarding adsorption, having an AS removal efficiency of only up to 60% (42).…”

Section: Discussionmentioning

confidence: 99%

Removal of Arsenic and Coliform Bacteria by Modified Sand Filter With Slag and Zeolite from Drinking Water

et al. 2017

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Background: Among the various adverse pollutants in water, coliform bacteria and arsenic are very important. Drinking of arseniccontaminated water has become a serious threat to public health and has affected millions of people across the world. Objectives: The aim of this study was to investigate the removal of arsenic and coliform bacteria from drinking water in small communities with the use of a conventional Slow Sand Filter (SSF) and modified filter by slag (SMF) and Zeolite (ZMF). Methods: In this study, initial concentrations of arsenic were 0.073, 0.11, 0.171, 0.21, 0.24, and 0.33 mg/l and the initial number of coliform bacteria was 4*10 6 MPN/100 mL. Arsenic and coliform bacteria samples were taken every 24 and 48 hours, respectively.

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“…Arsenite can be oxidized to arsenate [9]. Several technologies reported to remove arsenic from water include coagulation-flocculation, ion exchange, membrane technologies, reverse osmosis and adsorption processes [10].…”

Section: Introductionmentioning

confidence: 99%

Modification of Natural Common Clays as Low Cost Adsorbents for Arsenate Adsorption

Te¹,

Wichitsathian²,

Yossapol³

2015

IJESD

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Abstract-In this study, natural common clays were used as raw materials to be modified with ferric and ferrous solutions to develop improved efficient and low cost adsorbents. The adsorbents (Raw Clay, Clay/FeSO 4 , and Clay/FeCl 3 ) were investigated for arsenate removal from synthetic aqueous solution in batch studies with respect to contact time, solution pH, initial As(V) concentration, and temperature. The results showed that As(V) uptake was pH dependent and the high efficiency occurred in the acidic condition. The adsorption kinetic data were fitted well with the pseudo second order adsorption model. The estimated maximum adsorption capacity from Langmuir model was 0.44, 1.50, and 0.86 mg/g for Raw Clay, Clay/FeSO 4 , and Clay/FeCl 3 , respectively. The values of a dimensionless constant separation factor (R L ) and the magnitude of the adsorption intensity (1/n) showed that As(V) was adsorbed favorably on all adsorbents. The thermodynamic parameters indicated that the adsorption is spontaneous and endothermic and an irregular increase of the randomness at the adsorbent-adsorbate interface during the adsorption.

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Remediation of inorganic arsenic in groundwater for safe water supply: A critical assessment of technological solutions

Cited by 297 publications

References 147 publications

Arsenic in African Waters: A Review

Arsenic in African Waters: A Review

Removal of Arsenic and Coliform Bacteria by Modified Sand Filter With Slag and Zeolite from Drinking Water

Modification of Natural Common Clays as Low Cost Adsorbents for Arsenate Adsorption

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