The experimental study of fluorine-leaching ability of granite with different solutions: A new insight into the dynamic of groundwater fluorine levels along coastal zones

Chen, Qiao; Dong, Feifei; Jia, Zhiwen; Wei, Jiuchuan; Jia, Cuiping; An, Maoguo; Ji, Yongming; Hao, Decheng

doi:10.1016/j.jconhyd.2020.103703

Cited by 8 publications

(2 citation statements)

References 34 publications

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“…Under alkaline conditions, the supersaturated state of calcite, dolomite, and other carbonate minerals will promote the reduction of Ca 2+ and Mg 2+ concentration and accelerate the dissolution of fluorite, fluorapatite, and other fluorine-bearing minerals, leading to increasing F − concentration [Eqs. 1-3] (Chen et al, 2020;Hao et al, 2022).…”

Section: Dissolution and Ion Exchange Of Fluorine-bearing Mineralsmentioning

confidence: 99%

Sources and migration characteristics of fluorine in the river water of a small karst watershed influenced by coal mining

Huang

et al. 2022

Front. Environ. Sci.

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In high-fluorine geological background areas, the supergene geochemical process of fluorine has an impact on regional environmental health and safety, which has long been the focus of attention. However, in karst areas characterized by a high incidence of endemic fluorosis, the migration and transformation of fluorine in surface water have not received sufficient attention. This study investigated the joint influence of the weathering and erosion of carbonate rocks and coal-bearing strata on a typical small watershed. Accordingly, 239 samples representing 13 periods of hydrochemical samples were systematically collected to clarify the source, migration, and transformation characteristics of fluorine in surface water. The results revealed that the pH of the Huatan River was low in the rainy season and high in the dry season. The annual variation range of fluorine concentration was 0.11–0.40 mg/L. Although mining development produced acid mine drainage with high fluorine concentration, its impact at the watershed scale appeared to be limited. In terms of spatial scale, the concentration of fluorine in the Huatan River increased gradually from upstream to downstream. The dissolution of fluorite and other fluorine-bearing minerals had not reached the saturation state. The fluorine in the watershed primarily came from the dissolution of fluorine-bearing minerals, followed by the contribution of atmospheric precipitation. The release of fluorine adsorbed on the surface of clay minerals was not the main source of this element. The leaching of the watershed was shown to represent a critical transport process concerning fluorine in the Huatan River, and evaporation had a notable impact on the enrichment of fluorine in water.

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Section: Dissolution and Ion Exchange Of Fluorine-bearing Mineralsmentioning

confidence: 99%

Sources and migration characteristics of fluorine in the river water of a small karst watershed influenced by coal mining

Huang

et al. 2022

Front. Environ. Sci.

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“…Pearce (2018), studied the mineralogy and geochemistry of gneisses from the Lillesand area of Norway and observed that the mineralogy, texture, particle size, temperature and reaction time affected the leaching ability of the rocks in agreement to earlier researchers. Finally, Chen et al (2020) carried out an experimental study on Fluorine-leaching ability of granite, with different solutions. The results obtained gave insight into the effects of sea water or brine intrusion on the leaching of Fluorine bearing rocks in a Coastal zone of China.…”

Section: Introductionmentioning

confidence: 99%

Leaching Experiments to Delineate Factors Governing Rock–water Interactions: Case of the North- Western Part of the Volta River Basin of Ghana

Lartsey

2023

Preprint

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Leaching experiments were carried out on five silicate rock samples from the various geological units of the North-Western part of the Volta River Basin of Ghana. Four experimental conditions were tested: (1) room temperature experiments opened to only atmospheric conditions, (2) at a temperature of 50ºC, (3) experiment saturated with CO2 gas and (4) in acid environment (HNO3 & H2SO4). The aim of this study was to investigate the effects of these conditions on rock-water interactions that influence groundwater chemistry in the study area. Mineralogical composition of rocks analyzed prior to the experiment, through petrographic microscope and X-ray Diffraction (XRD) revealed that rocks are composed of Quartz, Albite, K-Feldspar, Ca- Amphibole, Epidote, Biotite, Chlorite and Muscovite, which are typical silicate minerals. Electrical Conductivity (EC) and pH of leachates measured periodically to monitor reaction progress, revealed that the variations of these parameters were influenced by the mineralogical composition of the rocks, reaction time and experimental conditions. The chemical facies of lixiviate samples from the environment saturated in CO2 at 1 bar were consistent with groundwater chemistry from the study area, corroborating the importance of CO2 gas on rock-water interactions. Mass balance calculations carried out on leachates from experiments saturated with CO2 revealed that major cation chemistry were largely a result of the dissolution of Albite, K-Feldspar, Biotite, Ca-Amphibole and Biotite.

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Geochemical Processes of Groundwater Fluoride Evolution in Geothermal Areas: A New Insight into the Dynamics of Fluorine Levels in Geothermal Water

Dong,

Yin,

Chen

et al. 2024

Expo Health

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The experimental study of fluorine-leaching ability of granite with different solutions: A new insight into the dynamic of groundwater fluorine levels along coastal zones

Cited by 8 publications

References 34 publications

Sources and migration characteristics of fluorine in the river water of a small karst watershed influenced by coal mining

Sources and migration characteristics of fluorine in the river water of a small karst watershed influenced by coal mining

Leaching Experiments to Delineate Factors Governing Rock–water Interactions: Case of the North- Western Part of the Volta River Basin of Ghana

Geochemical Processes of Groundwater Fluoride Evolution in Geothermal Areas: A New Insight into the Dynamics of Fluorine Levels in Geothermal Water

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