铁矿开采影响地区地下水中金属的时空变化:评估来源和人类健康风险

Soma Giri , Ashwani Kumar Tiwari , Mukesh Kumar Mahato , Abhay Kumar Singh
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引用次数: 2

摘要

金属浓度是季节性确定的,以评估印度贾坎德邦受铁矿开采影响地区通过地下水摄入金属对当地人口可能造成的风险。结果显示,在季风前季节和采矿活动活跃的地区,金属浓度在空间和时间上存在显著变化,最高值。考虑到所有季节,约75%的样本中Fe和Mn超过了饮用水质量标准。如主成分分析所示,地下水中的金属既可归因于地质来源,也可归因于人为原因,这导致提取了四个因素,解释了68.1%的数据差异。根据美国环保局的方法,为人类健康风险评估计算的金属的危险系数(HQ)表明,由于金属的HQ没有超过1,因此这些金属单独不会对当地人口构成风险。然而,根据危害指数(HI)计算的金属集体风险表明,大多数地区的地下水主要在季风前季节不适合饮用。儿童居民比成年人更容易受到非致癌风险的影响。据估计,雨季前儿童人口的HI大于1(1.16),这表明弱势儿童人口的健康风险。与其他季节相比,季风前季节的风险更高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Spatio-temporal variations of metals in groundwater from an iron mining impacted area: Assessing sources and human health risk

The concentrations of metals were determined seasonally to assess the probable risk on the local population due to ingestion of metals via the groundwater in an iron mining impacted area of Jharkhand in India. The results depicted significant spatial and temporal variation in the concentration of metals with the highest values during the pre-monsoon season and in the locations with active mining activities. Fe and Mn exceeded the drinking water quality standards in about 75% of the samples considering all the seasons. The metals in the groundwater can be ascribed to both geogenic sources and anthropogenic causes as depicted from principal component analysis, which resulted in extraction of four factors explaining 68.1% of data variance. The hazard quotients (HQ) of the metals calculated for the human health risk assessment according to USEPA methodology suggested that the metals individually did not pose risk to the local population since the HQ of the metals did not exceed unity. However, collective risk of the metals as calculated by the Hazard Index (HI) suggested that the groundwater of most of the locations is unfit for drinking predominantly in the pre monsoon season. The child residents were more susceptible to non-carcinogenic risk than the adult population. The HI for the child population was estimated to be greater than one (1.16) in the pre monsoon season suggesting health risk for vulnerable child populace. The risk was higher in the pre monsoon season as compared to other seasons.

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