Geochemical modeling of high fluoride concentration Biology essay
The fluoride concentration in the groundwater sample wells selected for this study varies. 1. LL of the samples containing fluoride concentrations. Summary In this study we have developed well-validated thermodynamic models for solution behavior and solid-liquid equilibrium for all binary fluoride systems, for which activity data are available. The subject of modeling examines fluoride systems of the -1 HF-H2O, NaF-H2O, KF-H2O, RbF-H2O and CsF-H2O and one -, Relationship of water quality parameters with the fluoride ion concentration in groundwater. The correlation matrices between fluoride and major ions are shown in . It is observed that the relationship between F − and pH is significant and positive r, 0.247. A higher alkalinity of the groundwater therefore activates the leaching of fluoride. The clay used to make bricks and the ash released from brick kiln industries are reported to contain high levels of fluoride. Mukherjee et al. 2018 Sankhla et al. 2018 Singh et al. 2018. The complicated link between groundwater fluoride and human health, lack of awareness, limited access to fluoride treatment facilities and poor socio-economic conditions in rural areas. Cation exchange increased fluoride concentration. L as the Na Ca molar ratio increased. 24. 0, while the salt effect led to an approximately 5-10 increase in complex F⁻ in. A numerical model was calibrated using core flooding data, based on which the relative permeabilities indicated the change in core-scale wettability by FM solutions. The results showed that increasing the FM concentration in the injection brine brought the initially oil-wet core to a more water-wet state and that the pH of the in situ solution played an important role. High - also facilitates the exchange of hydroxides OH - and F - on sediment surfaces that contribute to F − enrichment of groundwater through desorption. Geochemical modeling indicated that the precipitation of calcite, dolomite and aragonite is conducive to the release of F-. Higher solubility of Fe III oxide, corresponding to goethite and lepidocrocite, was related to higher arsenic concentrations, while hematite had too low solubility to produce high arsenic groundwater. The study presented both geochemical and modeling evidence for the contrasting behavior of groundwater, arsenic and fluoride. In this study, we have developed well-validated thermodynamic models for solution behavior and solid-liquid equilibrium for all binary fluoride systems, for which activity data are available. The subject of the modeling study fluoride systems of the -1 HF-H2O, NaF-H2O, KF-H2O, RbF-H2O and CsF-H2O and one - H2SiF6-H2O, fluoride concentration showed a gradually decreasing trend from PWCGA to DCG. High fluoride concentrations were closely related to a weakly alkaline groundwater environment, high HCO3⁻, high Na. The fluoride concentration is also affected by the depth of the groundwater. Hydrochemical research showed that the fluoride concentration was higher in Na-HCO in Ca-SO Ca-HCO of the groundwater. Fluoride F − is essential for normal bone growth, but its higher concentration in drinking water poses major health problems and fluorosis is common in many parts of India. The present article addresses the purpose of establishing facts about the chemical characteristics responsible for the higher concentration of F - in the. The high F concentrations detected in the groundwater of the study area are likely related to gaseous and dusty emissions with high fluoride content.,