Highlight'/> Evaluation of aqueous geochemistry of fluoride enriched groundwater: A case study of the Patan district, Gujarat, Western India
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Evaluation of aqueous geochemistry of fluoride enriched groundwater: A case study of the Patan district, Gujarat, Western India

机译：富氟地下水的含水地球化学评价：以印度西部古吉拉特邦的帕坦地区为例

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Highlights?The concentration of fluoride was found to vary between 0.4 to 4.8mg/L.?Na-HCO3water facies influences the dissolution of fluorite mineral.?Calcite precipitation leads to the removal of Ca2+and thus fluorite dissolution takes place.?PCA reveals interrelationship between water quality variables and fluoride enrichment.AbstractHigh fluoride (F?) groundwater causes fluorosis which might at severe stages lead to deformation of bones, bilateral lameness. The concentration of F?ranged from 0.4 to 4.8mg/L. This study suggests that high HCO3?and Na+in alkaline medium along with water–rock interaction plays important role in enrichment of F?in groundwater. Na-HCO3is the dominant water type followed by Ca-HCO3suggesting dominance of Na+, Ca2+and HCO3?ions in groundwater. Factor analysis of water quality parameters suggests that four principal components account for 74.66% of total variance in the dataset. Factor 1 shows higher positive loading for pH, HCO3?negative loading for F?, Ca2+, SO42?depicting ion-exchange and HCO3dominant water type responsible for F enrichment in groundwater.Saturation index for selected minerals suggests that most of the samples are oversaturated with calcite and undersaturated with fluorite. Calcite precipitation leads to the removal of Ca2+from solution thus allowing more fluorite to dissolve. These released Ca2+ions combine with CO32?ions to further enhance the precipitation of CaCO3.
机译： 突出显示 ？ 发现氟化物的浓度在0.4至4.8mg / L之间。 ？ Na-HCO 3 水相影响萤石矿物的溶解。 ？ 方解石沉淀导致Ca 2 + 的去除，因此萤石溶解需要 ？ PCA揭示了水质变量与氟化物富集之间的相互关系。 摘要 高氟化物（F ？）地下水会导致氟中毒，严重时可能导致骨骼变形，双侧la行。 F ？的浓度范围为0.4至4.8mg / L。这项研究表明，高HCO 3 ？和Na + 以及水-岩相互作用在富集地下水中F ？中起着重要作用。 Na-HCO 3 是水的主要类型，其次是Ca-HCO 3 的建议水质。 Na + ，Ca 2 + 和HCO 3 ？地下水中的离子。水质参数的因子分析表明，四个主要成分占数据集中总方差的74.66％。因子1显示出较高的pH正负载，HCO 3 ？ F ？，Ca 2 + ，SO 4 2？描述离子交换和HCO 3 主要水类型负责地下水中的F富集。 所选矿物质的饱和指数表明，大多数样品中的方解石过饱和，而萤石的饱和度较低。方解石沉淀导致从溶液中去除Ca 2 + ，从而使更多的萤石溶解。这些释放的Ca 2 + 离子与CO 3 2？离子进一步增强CaCO 3 的沉淀。

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