Hydrochemistry of Fluoride in Groundwaters from the Permo–Triassic Aquifer System of Central Shaanxi Province, Northwest China

Dou, You; Howard, Ken; Yang, Liwei; Dong, Wei; Guo, Li

doi:10.1007/s12403-016-0218-6

Cited by 11 publications

(9 citation statements)

References 38 publications

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“…In China, extensive groundwater fluoride contamination is primarily observed in northern China largely resulting from dissolution of F-bearing minerals. In northwestern arid inland basins, such as Manas River Basin, Zhangye Basin, Hetao Plain, Datong Basin, Taiyuan Basin, Yuncheng Basin, Guanzhong Basin, and the Huhhot Basin, all of which are controlled by continental arid and semi-arid climates, high fluoride groundwaters largely exist in Quaternary lacustrine and fluvial aquifers [21,22,23,24,25,26,27]. Fluorite dissolution in sediments and accumulation through water–rock interactions are the primary mechanisms attributed to F enrichment in these areas.…”

Section: Introductionmentioning

confidence: 99%

Fluoride Occurrence and Human Health Risk in Drinking Water Wells from Southern Edge of Chinese Loess Plateau

Jia

Qian

et al. 2019

IJERPH

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Fluoride hydrogeochemistry and associated human health risks implications are investigated in several aquifers along the southern edge of the Chinese Loess Plateau. Locally, 64% shallow groundwater samples in loess aquifer exceed the fluoride limit (1.5 mg/L) with the maximum of 3.8 mg/L. Presently, the shallow groundwater is the main source of private wells for domestic use, and this is clearly a potential risk for human health. Hydrogeochemistry and stable isotopes are used to elucidate the diversity of occurrence mechanisms. Enrichment of fluoride in groundwater is largely controlled by the F-containing minerals dissolution. Furthermore, alkaline condition and calcium-removing processes promote water–rock interactions. Stable isotopes of hydrogen and oxygen (δD and δ18O) in study area waters demonstrate that groundwater in loess aquifer is old, which means groundwater remains in the aquifer for a long time. Long residence time induces sufficient water–rock interactions, which play significant roles in the resolution of fluoride minerals. Samples from the shallow loess aquifer show elevated fluoride levels, which may pose human health risk for both adults (60%) and children (94%) via oral intake. To ensure drinking water safety, management measures such as popularizing fluoride-removing techniques and optimizing water supply strategies need to be implemented.

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Section: Introductionmentioning

confidence: 99%

Fluoride Occurrence and Human Health Risk in Drinking Water Wells from Southern Edge of Chinese Loess Plateau

Jia

Qian

et al. 2019

IJERPH

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“…Fluoride concentrations in the COC are around 1 mg/L and tend to be slightly lower than fluoride concentrations in the shallower aquifers. Mean fluoride concentrations exceed 2 mg/L in the QLB in the south; they average 1.08 mg/L in the PTF but are consistently above 1 mg/L over most of the area and locally exceed 2.5 mg/L (Dou et al 2016). There is no clear distinction between the water quality in the COC to the south of the fault with that to the north of the fault and this suggests that the aquifer extends across the fault without interruption to flow.…”

Section: Hydrochemical Data Collectionmentioning

confidence: 99%

“…In the north, it is suspected that indirect recharge is a major component of total recharge to the shallow aquifers. The indirect recharge is due to leakage from the irrigation canal that, in turn, is fed by the Shibaochuan reservoir, located at high elevation, just outside the study area to the northwest (Dou et al 2016) (Figure 2). Due to irrigation inefficiencies, excess irrigation water also contributes to aquifer recharge, but as with leakage from the irrigation canal, recharge rates have not been quantified with any degree of reliability.…”

Section: Site Locationmentioning

confidence: 99%

“…In the district of Chengcheng, Wei Nan city, Shaanxi Province, China, diminishing groundwater reserves in the shallow Quaternary aquifer due to over‐abstraction, and elevated fluoride in the similarly shallow Permo‐Triassic aquifer (Dou et al 2016), have become a serious concern. The presence of fluoride is particularly worrisome, as 80% of groundwater samples collected from the Permo‐Triassic aquifer show fluoride in excess of the standard for drinking water (1.0 mg/L), and fluorosis (dental and skeletal) affects a significant proportion of the local population (Liu et al 2005).…”

Section: Introductionmentioning

confidence: 99%

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Hydrochemical Relation Between Shallow Groundwater with Elevated Fluoride and Groundwater in Underlying Carbonates

et al. 2020

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In the arid to semi‐arid district of Chengcheng, Weinan City, in central Shaanxi Province, diminishing groundwater reserves in the shallow Quaternary (QLB) aquifer and elevated fluoride in the similarly shallow Permo‐Triassic (PTF) aquifer, have promoted interest in the development of groundwater resources in the deep but poorly understood Cambrian‐Ordovician carbonate aquifer system (COC). To investigate the origin of the COC groundwaters and the relationship between the deep and shallower systems, a hydrochemical study was undertaken involving 179 major and minor ion analyses, 39 stable isotope analyses (δD and δ18O), and 14 carbon isotope analyses (14C and δ13C). PHREEQC 3.0 was used to investigate mixing. Hydrochemical data support the presence of a well‐connected regional flow system extending southwards from the more mountainous north. Stable isotope data indicate that the COC groundwaters originate as soil zone infiltration, under a much cooler regime than is found locally today. This is confirmed by 14C, which indicates the groundwater to be palaeowater recharged during the late Pleistocene (∼10–12 ka B.P.). The presence of nitrate in the COC groundwaters suggests leakage from overlying shallow aquifers currently provides an additional source of COC recharge, with major faults possibly providing the primary pathways for downward vertical flow.

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“…Therefore, these activities should be wisely regulated and more water resource management research should be conducted. Dou et al (2016b) reported by hydrochemical and isotopic signatures of groundwater that elevated fluoride in groundwater can be partially attributed to agricultural activities, although natural factors such as fluorite dissolution and groundwater evaporation are the dominant influencing factors. Numerical modeling is also a powerful tool in groundwater contamination studies.…”

Section: Final Remarksmentioning

confidence: 99%

Groundwater Quality in Western China: Challenges and Paths Forward for Groundwater Quality Research in Western China

2016

Expo Health

136

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Groundwater quality issues are becoming as important as groundwater quantity issues, making groundwater quality research a hot topic worldwide. With human activity intensifying in western China as a result of the West Development Program and the Silk Road economic belt project of China, groundwater quality in western China is deteriorating rapidly. This special issue of Exposure and Health promotes groundwater quality research to respond to these challenges. This introductory article details the challenges faced by contemporary groundwater quality researchers, and proposes ways to advance groundwater quality research in western China. The paper also introduces the articles that follow in this special issue. The key goal of this work is to encourage new and experienced scholars to engage with this field.

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Hydrochemistry of Fluoride in Groundwaters from the Permo–Triassic Aquifer System of Central Shaanxi Province, Northwest China

Cited by 11 publications

References 38 publications

Fluoride Occurrence and Human Health Risk in Drinking Water Wells from Southern Edge of Chinese Loess Plateau

Fluoride Occurrence and Human Health Risk in Drinking Water Wells from Southern Edge of Chinese Loess Plateau

Hydrochemical Relation Between Shallow Groundwater with Elevated Fluoride and Groundwater in Underlying Carbonates

Groundwater Quality in Western China: Challenges and Paths Forward for Groundwater Quality Research in Western China

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