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首页> 外文期刊>Water Science >Identification of salinization by bromide and fluoride concentration in coastal aquifers near Chennai, southern India
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Identification of salinization by bromide and fluoride concentration in coastal aquifers near Chennai, southern India

机译：印度南部钦奈附近沿海含水层中溴化物和氟化物浓度的盐化作用鉴定

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This study aims to use fluoride as an additional indicator for seawater intrusion apart from the known effective geochemical indicators such as EC, TDS, sodium, chloride and bromide. Groundwater in a coastal part of Arani-Koratalaiyar river basin located north of Chennai, Tamil Nadu, India was assessed to determine its suitability for domestic purpose and to delineate the region affected by seawater intrusion. Fluoride concentration in groundwater samples from forty nine locations varied from 0.02mg/l to 2.9mg/l with an average of 0.5mg/l. As per the Bureau of Indian Standards, the permissible range of fluoride in drinking water is 0.6–1.5mg/l. Fluoride concentration in groundwater of this area exceeds 1.5mg/l in 6% of the groundwater samples and is below 0.6mg/l in 74% of the groundwater samples. There is no known geological source for fluoride in this area. Spatial variation in fluoride concentration in groundwater indicates that the coastal areas have comparatively high fluoride due to seawater intrusion which was similar in comparison with EC and bromide concentration measured in groundwater. This study indicates that fluoride can be used as an indicator of seawater intrusion in coastal areas.
机译：这项研究旨在使用氟化物作为海水入侵的附加指标，除了已知的有效地球化学指标（例如EC，TDS，钠，氯化物和溴化物）。对位于印度泰米尔纳德邦钦奈以北的Arani-Koratalaiyar流域沿海地区的地下水进行了评估，以确定其是否适合家庭用途并划定受海水入侵影响的区域。四十九个地点的地下水样品中的氟化物浓度从0.02mg / l到2.9mg / l不等，平均为0.5mg / l。根据印度标准局的规定，饮用水中氟化物的允许范围是0.6–1.5mg / l。该地区地下水中的氟化物浓度在6％的地下水样品中超过1.5mg / l，而在74％的地下水样品中低于0.6mg / l。该地区没有已知的氟化物地质来源。地下水中氟化物浓度的空间变化表明，沿海地区由于海水入侵而具有较高的氟化物，这与地下水中EC和溴化物的浓度相近。这项研究表明，氟化物可以用作沿海地区海水入侵的指标。

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