Source apportionment of fluorine pollution in regional shallow groundwater at You’xi County southeast China

Lü, Jian; Qiu, Haiyuan; Lin, Huangbin; Yuan, Yuan; Chen, Zhi; Zhao, Rurong

doi:10.1016/j.chemosphere.2016.05.057

Cited by 36 publications

(7 citation statements)

References 23 publications

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“…The adsorption isotherm is illustrated in Fig. 1, and the equation parameters are listed in during the adsorption of uorine, and the radius of OH − was similar to that of F − , so that F − within the lattice of soil clay minerals could also be displaced, which results in much lower enrichment of F − in saline-sodic soils with high pH values (Xie et al, 1999;Lü et al, 2016). Furthermore, the content of organic matter in soil was an important factor affecting uorine adsorption.…”

Section: Resultsmentioning

confidence: 99%

Improved adsorption of fluorine on three typical saline-sodic soils by increasing functional groups with Al 2 (SO 4 ) 3 incorporation

Zang

Wang

Huang

et al. 2022

Preprint

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Fluorine pollution in saline-sodic soils has become an important environmental problem, but little is known about the interaction between Al2(SO4)3 and fluorine when Al2(SO4)3 is used to improve saline-sodic soils. In this study, batch adsorption experiments were conducted to investigate the impacts of different saline-sodic soils with Al2(SO4)3 on fluorine adsorption, and the mechanisms of adsorption were characterized by SEM, BET, FTIR, and XPS analysis. The results showed that fluorine adsorption decreased with increasing soil salinity, and the addition of Al2(SO4)3 increased the adsorption of fluorine in soils. Among the three saline-sodic soils, Al2(SO4)3 contributed greatly to fluorine adsorption by mildly saline-sodic soils, with a range of 40.84%-69.70%. Fluorine adsorption isotherms could be properly described by the Langmuir and Freundlich models. At higher fluorine equilibrium concentrations, the adsorption amount of fluorine was greater for soils with Al→F. Both the soil porosity and the number of aggregates of saline-sodic soils were increased after adding Al2(SO4)3 for adsorption. Functional groups such as Si-O-Si, H-O-H, C-H, -OH, and Al-O-H were involved in the reaction process. Fluorine adsorption on saline-sodic soils refers to the ligand exchange and electrostatic adsorption, and F− replaces -OH on the soil surface. This work may provide a theoretical reference for the changes in fluorine chemical behavior when Al2(SO4)3 ameliorates saline-sodic soils.

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Section: Resultsmentioning

confidence: 99%

Improved adsorption of fluorine on three typical saline-sodic soils by increasing functional groups with Al 2 (SO 4 ) 3 incorporation

Zang

Wang

Huang

et al. 2022

Preprint

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“…Despite As, Cr and Pb being classified as slight ecological risk in the study area, Pb contents in ca 59.0% of the sampled areas exceeded the provincial background value (figure 4 e ), which was possibly related to the nearby Pb–Zn mine in the north [48]. On the other hand, the even higher Pb contents in those areas could also partially be associated with vehicular exhausts originated from the use of leaded gasoline and deterioration of mechanical parts, e.g.…”

Section: Resultsmentioning

confidence: 99%

Assessment of tea garden soils at An'xi County in southeast China reveals a mild threat from contamination of potentially harmful elements

et al. 2018

Self Cite

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An extensive study of the spatial distribution characteristics of potentially harmful elements (PHEs) in tea (Camellia sinensis (L.) O. Kuntze) garden soils and ecological risk assessment at An'xi County, the birthplace of oolong tea in China, was implemented. A total of 78 soil samples were examined to determine the concentration of five PHEs (As, Cd, Cr, Hg and Pb), soil organic matter and pH by using geostatistical approaches combined with geographical information system analysis. All PHEs presented in the study area were slightly higher than their background values for provincial and national standards except Cr. Moreover, ecological risk assessment of PHEs in the tea garden soils at An'xi County was performed by means of the Håkanson method. The average ecological potential risk index (Er) of the five PHEs followed a descending order of Cd > Hg > Pb > As > Cr, and suggested a moderate ecological risk in the study area.

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“…Many domestic and international scholars have carried out a great deal of empirical research on this. Alkaline water is beneficial to the dissolution of F −containing minerals (Lü et al, 2016). The Ca 2+ concentration promotes further dissolution of F −containing minerals such as fluorite, thus releasing F − into groundwater (Liu et al, 2015;Li et al, 2019).…”

Section: Migration Mechanism Of Abnormal Ions 1) Migration Mechanism ...mentioning

confidence: 99%

Analysis of groundwater ion abnormality and its cause of centralized drinking water sources in Jieshou City, China

Liu

et al. 2023

Front. Environ. Sci.

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Groundwater provides drinking water to city and rural residents; which is also one of the chief water sources for commercial and agricultural activities in Jieshou City. We collected and analyzed the samples of 18 underground water source wells in Jieshou. We investigated whether the water was of acceptable quality and had characteristics that exceeded the standard. This study was conducted to determine the chemical characteristics of groundwater and abnormally high super-standard ions found in groundwater. The hydrogeological conditions of the study area were analyzed through data collection; through sample collection and sample testing, the characteristics and types of water chemistry were analyzed by means of mathematical statistics analysis and the Piper chart. The genesis of water chemistry was discussed using the Gibbs chart and correlation analysis; the proportional coefficient of ion molar concentration was used to judge the source, origin, and forming process of groundwater chemical composition. The results show that the groundwater is classified as marginally alkaline water, with a composition of Na-HCO3. The cations are mainly Na+, and the anions are mainly HCO3−. According to the Ⅲ water standard of groundwater quality standard and comparing the content of each ion, Na+ and F− are the primary abnormal super-standard ions, and ions and compounds are the main occurrence states. The concentrations of Na+ and F− exceed the standard for class Ⅲ water. There was a positive correlation between the abnormal Na+ and F−, and the concentration of F− increased with the increase in monitoring depth. The causes of abnormal ions were mainly determined by the lithology of the aquifer in the study area, and most of them are fluorine-containing rocks, which are transferred into groundwater through leaching or hydration. The enrichment of Na+ and F− is influenced by the local primary geological setting, hydrochemical type, hydrogeological conditions, pH and artificial activities, and the primary geological setting is the main influencing factor.

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Source apportionment of fluorine pollution in regional shallow groundwater at You’xi County southeast China

Cited by 36 publications

References 23 publications

Improved adsorption of fluorine on three typical saline-sodic soils by increasing functional groups with Al 2 (SO 4 ) 3 incorporation

Improved adsorption of fluorine on three typical saline-sodic soils by increasing functional groups with Al 2 (SO 4 ) 3 incorporation

Assessment of tea garden soils at An'xi County in southeast China reveals a mild threat from contamination of potentially harmful elements

Analysis of groundwater ion abnormality and its cause of centralized drinking water sources in Jieshou City, China

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