Groundwater Arsenic Contamination Throughout China

Rodríguez‐Lado, Luis; Sun, Guifan; Berg, Michael; Zhang, Qiang; Xue, Hanbin; Zheng, Qing‐Shui; Johnson, C. Annette

doi:10.1126/science.1237484

Cited by 777 publications

(311 citation statements)

References 41 publications

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“…High arsenic (As) in groundwater poses a severe health risk to 100 million people worldwide (Fendorf et al 2010;Rodriguez-Lado et al 2013). To provide As-safe drinking water, the groundwater in deep aquifers (>150 m) is suggested as an alternative source (Michael and Voss 2008).…”

Section: Introductionmentioning

confidence: 99%

Groundwater arsenic removal using granular TiO2: integrated laboratory and field study

Cui

et al. 2014

Environ Sci Pollut Res

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High concentrations of arsenic (As) in groundwater pose a great threat to human health. The motivation of this study was to provide a practical solution for As-safe water in As geogenic areas using granular TiO 2 (GTiO 2 ). The kinetics results indicated that the As (III/V) adsorption on GTiO 2 conformed to the Weber-Morris (WM) intraparticle diffusion model. The Langmuir isotherm results suggested that the adsorption capacities for As (III) and As (V) were 106.4 and 38.3 mg/g, respectively. Ion effect study showed that cationic Ca and Mg substantially enhanced As (V) adsorption, whereas no significant impact was observed on As (III). Silicate substantially decreased As (V) adsorption by 57 % and As (III) by 50 %. HCO 3 − remarkably inhibited As (V) adsorption by 52 %, whereas it slightly reduced As (III) adsorption by 8 %. Field column results demonstrated that ∼700 μg/L As was removed at an empty bed contact time (EBCT) of 1.08 min for 968 bed volumes before effluent As concentration exceeded 10 μg/L, corresponding to 0.96 mg As/g GTiO 2 . Two household filters loaded with 110 g GTiO 2 in the on-off operational mode can provide 6-L/day As-safe drinking water up to 288 and 600 days from the groundwater containing ∼700 μg/L As and ∼217 μg/L As, respectively. Integration of batch experiments and column tests with systematic variation of EBCTs was successfully achieved using PHREEQC incorporating a charge distribution multisite complexation (CD-MUSIC) model and one-dimensional reactive transport block.

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Section: Introductionmentioning

confidence: 99%

Groundwater arsenic removal using granular TiO2: integrated laboratory and field study

Cui

et al. 2014

Environ Sci Pollut Res

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“…G roundwater contamination with arsenic is a threat for most organisms, including man [1][2][3] . In plants, arsenic tolerance is critical for adaptation to specific soils and has determined plant distribution 4,5 ; the molecular mechanisms are analyzed mainly by studying proteins presumably involved in arsenate (As(V)) tolerance based on sequence homology with bacterial and yeast proteins 6,7 .…”

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confidence: 99%

Natural variation in arsenate tolerance identifies an arsenate reductase in Arabidopsis thaliana

et al. 2014

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The enormous amount of environmental arsenic was a major factor in determining the biochemistry of incipient life forms early in the Earth's history. The most abundant chemical form in the reducing atmosphere was arsenite, which forced organisms to evolve strategies to manage this chemical species. Following the great oxygenation event, arsenite oxidized to arsenate and the action of arsenate reductases became a central survival requirement. The identity of a biologically relevant arsenate reductase in plants nonetheless continues to be debated. Here we identify a quantitative trait locus that encodes a novel arsenate reductase critical for arsenic tolerance in plants. Functional analyses indicate that several non-additive polymorphisms affect protein structure and account for the natural variation in arsenate reductase activity in Arabidopsis thaliana accessions. This study shows that arsenate reductases are an essential component for natural plant variation in As(V) tolerance.

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“…Moreover, arsenic contamination and its detrimental impacts have been reported by various countries such as China [20], Bangladesh [21], Vietnam [22], and India [23] in recent years.…”

Section: Geofluidsmentioning

confidence: 99%

CO₂ Leakage-Induced Contamination in Shallow Potable Aquifer and Associated Health Risk Assessment

et al. 2018

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Leakage of stored CO 2 from a designated deep reservoir could contaminate overlying shallow potable aquifers by dissolution of arsenic-bearing minerals. To elucidate CO 2 leakage-induced arsenic contamination, 2D multispecies reactive transport models were developed and CO 2 leakage processes were simulated in the shallow groundwater aquifer. Throughout a series of numerical simulations, it was revealed that the movement of leaked CO 2 was primarily governed by local flow fields within the shallow potable aquifer. The induced low-pH plume caused dissolution of aquifer minerals and sequentially increased permeabilities of the aquifer; in particular, the most drastic increase in permeability appeared at the rear margin of CO 2 plume where two different types of groundwater mixed. The distribution of total arsenic (∑As) plume was similar to the one for the arsenopyrite dissolution. The breakthrough curve of ∑As monitored at the municipal well was utilized to quantify the human health risk. In addition, sensitivity studies were conducted with different sorption rates of arsenic species, CO 2 leakage rates, and horizontal permeability in the aquifer. In conclusion, the human health risk was influenced by the shape of ∑As plume, which was, in turn, affected by the characteristics of CO 2 plume behavior such as horizontal permeability and CO 2 leakage rate.

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Groundwater Arsenic Contamination Throughout China

Cited by 777 publications

References 41 publications

Groundwater arsenic removal using granular TiO2: integrated laboratory and field study

Groundwater arsenic removal using granular TiO2: integrated laboratory and field study

Natural variation in arsenate tolerance identifies an arsenate reductase in Arabidopsis thaliana

CO₂ Leakage-Induced Contamination in Shallow Potable Aquifer and Associated Health Risk Assessment

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Groundwater Arsenic Contamination Throughout China

Cited by 777 publications

References 41 publications

Groundwater arsenic removal using granular TiO2: integrated laboratory and field study

Groundwater arsenic removal using granular TiO2: integrated laboratory and field study

Natural variation in arsenate tolerance identifies an arsenate reductase in Arabidopsis thaliana

CO2 Leakage-Induced Contamination in Shallow Potable Aquifer and Associated Health Risk Assessment

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CO₂ Leakage-Induced Contamination in Shallow Potable Aquifer and Associated Health Risk Assessment