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首页> 外文期刊>Human and ecological risk assessment >Occurrence, health risks, and geochemical mechanisms of fluoride and nitrate in groundwater of the rock-dominant semi-arid region, Telangana State, India
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Occurrence, health risks, and geochemical mechanisms of fluoride and nitrate in groundwater of the rock-dominant semi-arid region, Telangana State, India

机译：印度岩石纳州地下岩土地下水地下水中氟化物和硝酸盐和硝酸盐的发生，健康风险和地球化学机制

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摘要

Highly contaminated groundwater can affect the human health and constrain the economic development of a country. For this study 105 groundwater samples were collected in rock-dominant semi-arid (RDSA) region, India and analyzed for hydrochemical parameters including major ions, fluoride, and nitrate. The human health risks due to groundwater fluoride and nitrate contamination were also assessed. The analysis reveals that most of the groundwater samples are alkaline in nature. Hydrochemical types of groundwater in the study area are mainly Ca.Mg-HCO3 and Na-HCO3 types and a few samples belong to Ca.Mg-Cl and Na-Cl types in the RDSA region. Fluoride concentration ranges from 0.5 to 3.5 mg/L, and predominantly eastern part of the study region has higher concentrations of fluoride with comparison to the western part. About 49% of the groundwater samples have fluoride concentration above 1.5 mg/L in groundwater, indicating a high health risk to residents. Eventually, water-rock interactions are the main processes to elevate the fluoride concentration in eastern part of the study area. Nitrate concentration ranges from 12 to 212 mg/L, and northern and southern parts of the study region have much higher nitrate concentrations than the central region of the study area, where nitrate concentration is below 45 mg/L. In terms of nitrate, 55% and 17% of the groundwater samples are under high risk and very high risk categories, respectively, which are not suitable for drinking purposes in the study region. Fertilizer application for crop yields could be one of the reasons for elevated nitrate concentration. The total hazard index for adults ranges from 0.87 to 7.08, and for children 1.17 to 9.57, which suggests that children are at higher health risk than adults in the study region. Therefore, contaminants filters and rainwater harvesting are suggested as measures to reduce the health risk in the area.
机译：高度污染的地下水会影响人类健康，并限制一个国家的经济发展。对于本研究，将105个地下水样品收集在岩石 - 显性半干旱（RDSA）区域，印度，并分析为具有主要离子，氟化物和硝酸盐的水化学参数。还评估了地下水氟化物和硝酸盐污染导致的人体健康风险。分析表明，大多数地下水样本是碱性的。研究区域的水化学类型的地下水主要是Ca.mg-HCO3和Na-HCO3类型，少量样品属于RDSA区域中的CA.MG-CL和NA-CL型。氟化物浓度范围为0.5至3.5mg / L，主要与西部相比，研究区的东部部分具有较高的氟化浓度。约49％的地下水样品在地下水中具有高于1.5mg / L的氟化物浓度，对居民的健康风险很高。最终，水岩相互作用是提高研究区域的东部氟化物浓度的主要方法。硝酸盐浓度范围为12至212mg / L，研究区的北部和南部部分具有远高于研究区域的中心区域的硝酸盐浓度远远大于45mg / L.就硝酸盐而言，55％和17％的地下水样本分别受到高风险和非常高的风险类别，这不适合在研究区域饮用目的。作物产量的肥料应用可能是硝酸盐浓度升高的原因之一。成人的总危害指数从0.87〜7.08，以及1.17至9.57的儿童，这表明儿童的健康风险高于研究区域的成年人。因此，建议污染物过滤器和雨水收获作为降低该地区健康风险的措施。

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  • 来源
    《Human and ecological risk assessment》 |2019年第2期|81-103|共23页
  • 作者

    Adimalla Narsimha; Li Peiyue;

  • 作者单位

    Changan Univ Sch Environm Sci & Engn 126 Yanta Rd Xian 710054 Shaanxi Peoples R China|Changan Univ Minist Educ Key Lab Subsurface Hydrol & Ecol Effects Arid Reg Xian Shaanxi Peoples R China;

    Changan Univ Sch Environm Sci & Engn 126 Yanta Rd Xian 710054 Shaanxi Peoples R China|Changan Univ Minist Educ Key Lab Subsurface Hydrol & Ecol Effects Arid Reg Xian Shaanxi Peoples R China;

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  • 正文语种 eng
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  • 关键词

    fluoride; nitrate contamination; groundwater quality; health risk assessment; India;

    机译：氟化物;硝酸盐污染;地下水质量;健康风险评估;印度;

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