High Fe and Mn groundwater in the Nanchang, Poyang Lake Basin of China: hydrochemical characteristics and genesis mechanisms

Chu, Xiangxiang; Ma, Zhifei; Wu, Daishe; Wang, Hao; He, Jingyuan; Chen, Ting; Zheng, Zi-Yin; Li, Hugang; Wei, Ping

doi:10.1007/s10661-022-10742-0

Cited by 12 publications

(9 citation statements)

References 29 publications

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“…Under acidic conditions, the dissolution of pyrite in coal-measuring formations with a specific composition can result in sulfide dissolving into groundwater and causing high levels of sulfate pollution. However, the absence of Fe in groundwater within the study area suggests that the impact of pyrite oxidation on sulfate may be limited . The presence of Mg 2+ and Ca 2+ in groundwater exhibits a significant correlation with SO 4 2– (as shown in Tables S3, S4).…”

Section: Resultsmentioning

confidence: 89%

“…However, the absence of Fe in groundwater within the study area suggests that the impact of pyrite oxidation on sulfate may be limited. 3 The presence of Mg 2+ and Ca 2+ in groundwater exhibits a significant correlation with SO 4 2− (as shown in Tables S3, S4). Both the Gibbs diagram and Na end-element diagram indicate that rock weathering and dissolution dominate the chemical composition of groundwater.…”

Section: Principal Component Analysis (Pca) and Factorial Analysis (Fa)mentioning

confidence: 89%

“…The hydrogeochemical evolution of groundwater systems has been extensively explored recently, and air–rock–water interactions are the key mechanisms in most cases . Numerous approaches such as statistical calculations, correlation analysis, Gibbs model, and Piper diagrams are commonly employed for the investigation of hydrogeochemical characteristics, while hydrogeochemical diagrams serve as valuable tools in this regard. ,,, For instance, Zhang et al conducted a comprehensive investigation of the hydrogeochemical processes and assessed the water quality of mine water in karst collapse columns using hydrochemical, multivariate statistical methods, and stable isotope analyses . The hydrogeochemical components undergo variations along the groundwater flow direction, which is determined by the prevailing hydrogeochemical processes such as mineral dissolution or precipitation, ion exchange, and mixing effects. ,, Many hydrogeological studies have been conducted to understand the interactions of groundwater and predict the groundwater in an undamaged groundwater system. , A combination of the geometry in the karst aquifer, recharge, and mining exploitation are ignored in current research despite their significance.…”

Section: Introductionmentioning

confidence: 99%

“…Groundwater is a crucial global resource. , In regions and nations where surface water is absent, groundwater serves as the primary source of potable water. − According to statistical data, approximately 61% of Chinese cities rely on groundwater as their primary source of drinking water; however, approximately 40% (2.7 Gm 3 ) of China’s groundwater has been impacted by mining activities. ,− However, the closure of mines has been on the rise year after year due to a variety of factors, including further structural adjustments and resource integration within the coal industry, elimination of excess energy capacity, and safety and environmental protection restrictions . The groundwater environmental issues arising from coal mining have long been a pivotal constraint on local socio-economic and ecological sustainability. − However, there are relatively few studies on the heavy metal pollution of groundwater after the closure of coal mines.…”

Section: Introductionmentioning

confidence: 99%

“…16 Numerous approaches such as statistical calculations, correlation analysis, Gibbs model, and Piper diagrams are commonly employed for the investigation of hydrogeochemical characteristics, while hydrogeochemical diagrams serve as valuable tools in this regard. 3,5,13,17 For instance, Zhang et al conducted a comprehensive investigation of the hydrogeochemical processes and assessed the water quality of mine water in karst collapse columns using hydrochemical, multivariate statistical methods, and stable isotope analyses. 1 The hydrogeochemical components undergo variations along the groundwater flow direction, which is determined by the prevailing hydrogeochemical processes such as mineral dissolution or precipitation, ion exchange, and mixing effects.…”

Section: Introductionmentioning

confidence: 99%

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Hydrodynamic Groundwater Modeling and Hydrochemical Conceptualization of the Closure Mining Area of the WuMa River Watershed of China

Yang,

Liu,

Liu

et al. 2023

ACS Omega

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The WuMa River (WMR) watershed is located in Renhuai City, Guizhou Province of China, which is a first-class tributary of the Chishui River. The geochemical investigation mainly included the determination of groundwater pH, total hardness, total dissolution solid, major cationic and anionic, and the geochemical groundwater modeling. The principal component analysis (PCA) and Gibbs model were used to analyze the pollution type and geochemical composition. The geochemical investigation results show that the cations of groundwater are dominated by Ca 2+ and the anions are dominated by HCO 3 − ; therefore, two main hydrochemical types in the study area are identified as Ca. The chemical composition of groundwater in this area is mainly controlled by weathering of the carbonate rocks. The ion concentration of groundwater in the study area exhibited significant spatial variability between dry and wet seasons, while temporal changes of cationic and anionic concentrations exhibited irregularities. In PCA and FA analysis, PC1, PC2, and PC3 were extracted, which could explain 51.92, 26.98, and 12.61% of the total information, respectively. F1 explained 67.44% of the total variance, among which Ca 2+ , Mg 2+ , K + , SO 4 2− , and Cl − contributed the most among the factors and were the main factors controlling the chemical composition of groundwater. The relative error between the measured water level and the simulated water level is less than 2%, which meets the requirements of simulation accuracy. During the simulation period of the model, a total recharge of 339.05 × 10 4 m 3 was observed in the simulated area, primarily attributed to infiltration from rainfall. The total excretion amounted to 330.78 × 10 4 m 3 , primarily through evaporation, with a minor amount of lateral outflow. The migration pathway of pollutants in groundwater primarily follows the direction of groundwater flow while diffusing vertically. The migration range of the pollutant is in accordance with the direction of groundwater flow and extends along the larger hydraulic gradient, demonstrating consistency. The findings of this study serve as a reminder that the closure of coal mines can constitute a significant source of water pollution. Simultaneously, they offer empirical data and theoretical references for the simulation and prediction of groundwater contamination in enclosed coal mines.

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Section: Resultsmentioning

confidence: 89%

Section: Principal Component Analysis (Pca) and Factorial Analysis (Fa)mentioning

confidence: 89%