Arsenic mobilization in shallow aquifers of Datong Basin: Hydrochemical and mineralogical evidences

Xie, Xianjun; Wang, Yanxin; Su, Chunli; Liu, Huaiqing; Duan, Mengyu; Xie, Zuoming

doi:10.1016/j.gexplo.2008.01.002

Cited by 114 publications

(73 citation statements)

References 22 publications

(22 reference statements)

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“…We evaluated information on soil characteristics including pH, salinity, texture, and so on, since soil features are factors of high As in groundwaters in south and east Asia (Smedley, 2003;Xie et al, 2008). Soil properties were complied from the "Harmonized World Soil Database" (FAO/IIASA/ISRIC/ISSCAS/JRC, 2009).…”

Section: Soil Informationmentioning

confidence: 99%

“…We interpret that, in our study area, the high As concentrations are related to processes of reductive dissolution in reducing environments. Studies in Northern China showed that groundwaters exist in the reducing conditions and high As levels in groundwaters are enhanced by both high salinity and alkalinity in the semiarid-arid areas (Guo et al, 2008;Xie et al, 2008).…”

Section: Principal Component Analysismentioning

confidence: 99%

“…It is not known whether As contaminates the groundwater in the other densely populated basins. Quaternary aquifers are the most important source of groundwater in these basins (Guo et al, 2007a;Wang et al, 2009;Xie et al, 2009) and, despite waters rich in NaHCO 3 predominate (Currell et al, 2011;Xie et al, 2008), it appears that high As concentrations are exclusively correlated to reducing conditions in the basins (Guo et al, 2003;Li et al, 2007;Xie et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Predicting the risk of arsenic contaminated groundwater in Shanxi Province, Northern China

Zhang

Rodríguez‐Lado

Johnson

et al. 2012

Environmental Pollution

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a b s t r a c tShanxi Province is one of the regions in northern China where endemic arsenicosis occurs. In this study, stepwise logistic regression was applied to analyze the statistical relationships of a dataset of arsenic (As) concentrations in groundwaters with some environmental explanatory parameters. Finally, a 2D spatial model showing the potential As-affected areas in this province was created. We identified topography, gravity, hydrologic parameters and remote sensing information as explanatory variables with high potential to predict high As risk areas. The model identifies correctly the already known endemic areas of arsenism. We estimate that the area at risk exceeding 10 mg L À1 As occupies approximately 8100 km 2 in 30 counties in the province.

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Section: Soil Informationmentioning

confidence: 99%

Section: Principal Component Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Predicting the risk of arsenic contaminated groundwater in Shanxi Province, Northern China

Zhang

Rodríguez‐Lado

Johnson

et al. 2012

Environmental Pollution

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“…Arsenic contamination of groundwater is a form of groundwater pollution which is often due to naturally occurring high concentrations of arsenic in deeper levels of groundwater (Wikipedia, 2017). Extensive scientific studies were investigated into the geochemical processes, resulting in high As level of concentration in groundwater almost all over the world [6][7][8][9]. During this period naturally occurring As was found to be widespread in groundwater [10].…”

Section: Introductionmentioning

confidence: 99%

Current Situation of Aqueous Arsenic Contamination in Pakistan, Focused on Sindh and Punjab Province, Pakistan: A Review

Ahmed¹,

Mek²,

Nd³

et al. 2017

J Pollut Eff Cont

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The arsenic contamination has seriously affected public health in Pakistan, especially in highly contaminated Sindh and Punjab provinces. Results of recent studies show that over 3% of the population in Punjab was exposed to arsenic contamination of over 50 ug/L in drinking water, and 20% of the population is exposed to over 10 ug/L, with the limited standard of WHO, same as the EPA also sets the maximum contaminant level goal (MCLG) for drinking water. The situation in Sindh province was worse than in Punjab province, as the results show that 16% and 36% of population exposed to arsenic contaminated water over 50 ug/L and 10 ug/L respectively. According to a study conducted and based on samples from 1,184 wells across the country that actually proved that the process of boiling or filtration was not helpful to remove As from groundwater. Recent medical studies have confirmed 40 cases of arsenicosis occurred in worst situation. The purpose of this paper is to make a review about the current situation of arsenic contamination and its effect in the Pakistan.

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“…Arsenic is released through sulfide mineral oxidation (e.g., arseno-rich pyrite, arsenopyrite), desorption (increase in pH), and reductive dissolution of arsenic-bearing Fe(III) and Mn(IV) oxyhydroxides [11][12][13]. Options to avoid potential problems related to arsenic intake from groundwater may include avoiding locating wells in high As regions, to use alternative water sources (e.g., surface water sources), and to treat groundwater contaminated with arsenic.…”

Section: Introductionmentioning

confidence: 99%

Reactive Transport Modeling for Mobilization of Arsenic in a Sediment Downgradient from an Iron Permeable Reactive Barrier

Jeen

2017

Water

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Arsenic (As) can be naturally present in the native aquifer materials and can be released to groundwater through reduction dissolution of iron oxides containing As. While granular iron permeable reactive barriers (PRBs) can be effective for the treatment of arsenic in groundwater, the mobilization of arsenic in the sediment downgradient of the PRB might be an issue due to the reduced geochemical conditions generated by reactions in the PRB. The release of arsenic in the sediment downgradient from a proposed iron PRB was studied through laboratory column experiments and reactive transport modeling. The laboratory column experiments showed a significant removal of arsenic from the groundwater by granular iron (from the influent concentration of about 0.7 mg L −1 to less than 0.006 mg L −1 at the effluent); however, arsenic can be flushed out from the aquifer sediments (up to 0.09 mg L −1 ). The reactive transport modeling based on the geochemical reactions as suggested from the experiments, i.e., reductive dissolution of As-bearing goethite, was successful to reproduce the observed geochemical trends in the column experiments. This study can provide implications regarding the installation of iron PRBs to treat arsenic in groundwater and also be useful to understand geochemical behavior of arsenic under reduced conditions.

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Arsenic mobilization in shallow aquifers of Datong Basin: Hydrochemical and mineralogical evidences

Cited by 114 publications

References 22 publications

Predicting the risk of arsenic contaminated groundwater in Shanxi Province, Northern China

Predicting the risk of arsenic contaminated groundwater in Shanxi Province, Northern China

Current Situation of Aqueous Arsenic Contamination in Pakistan, Focused on Sindh and Punjab Province, Pakistan: A Review

Reactive Transport Modeling for Mobilization of Arsenic in a Sediment Downgradient from an Iron Permeable Reactive Barrier

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