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首页> 外文期刊>Ceylon Medical Journal >Groundwater fluoride in Sri Lanka: opportunities to mitigate the risk at maximum contaminant level
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Groundwater fluoride in Sri Lanka: opportunities to mitigate the risk at maximum contaminant level

机译：斯里兰卡的地下水氟化物：在最大污染物水平下降低风险的机会

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Introduction High groundwater fluoride (F) is one of the major environmental hazards in the dry zone of Sri Lanka.? The prolonged exposure to F at maximum contaminant levels can give rise to lifelong debility and disability among its inhabitants.Objective This study investigated the F contamination in groundwater resources in Sri Lanka above recommended Maximum Contaminant Levels (MCL) and possibilities to mitigate the health risk.Methods Groundwater samples (6107) were randomly collected from different geographic areas of the country, and categorised as hazardous, if it exceeded the maximum contaminant level of 4 mg/L (the level at which bone health is compromised). The minimum distances from a hazardous to a relatively safe F groundwater source (below 1.0 mg/L and 1.5 mg/L) were determined using geospatial analysis.Results: Only 2.3% (142) of the total sample was found to be hazardous to skeletal health. Optimal F sources were identified in close proximity to highly contaminated sources (>4.0 mg/L), some even within a walking distance of 500 metres.Conclusion The identification and elimination of maximally contaminated sources, possibly by dilution with widely available low F sources in close proximity, would be a more feasible and cost effective approach to ensure long term public health benefits.
机译：简介斯里兰卡干旱地区的地下水中高氟含量（F）是主要的环境危害之一。长期暴露于最大污染物水平下的F会导致其居民终生残疾和残疾。目的这项研究调查了斯里兰卡地下水资源中F的含量超过建议的最大污染物水平（MCL）以及减轻健康风险的可能性。方法从该国不同地理区域中随机抽取地下水样本（6107），如果超过最大污染物水平4 mg / L（危害骨骼健康的水平），则将其归类为危险样品。通过地理空间分析确定了从危险到相对安全的F地下水源（分别低于1.0 mg / L和1.5 mg / L）的最小距离。结果：发现总样本中只有2.3％（142）对骨骼有害健康。最佳F源在接近高度污染源（> 4.0 mg / L）的情况下被发现，有些甚至在500米的步行距离内也是如此。结论可以通过用广泛使用的低F源稀释来识别和消除最大污染源。紧密接近，将是确保长期公共卫生利益的更可行且更具成本效益的方法。

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