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首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >Health Risk Evaluation of Trace Elements in Geophagic Kaolinitic Clays within Eastern Dahomey and Niger Delta Basins Nigeria
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Health Risk Evaluation of Trace Elements in Geophagic Kaolinitic Clays within Eastern Dahomey and Niger Delta Basins Nigeria

机译：尼日利亚东部达荷美和尼日尔三角洲盆地地相高岭土中微量元素的健康风险评估

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The deliberate consumption of earthly materials is a universally recognised habit with health benefits and risks to those that practice it. Thirteen (13) samples comprising of six (6) Cretaceous and seven (7) Paleogene/Neogene geophagic kaolinitic materials, respectively, were collected and analysed for trace element concentrations (V, Cr, Co, Ni, Zn, Pb, and Fe), and possible risk on consumers’ health. The trace element compositions were obtained using laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) and X-ray fluorescence spectrometry (XRF) analytical methods. Based on their average concentrations, Fe > V > Cr > Ni > Zn > Pb > Cu > Co and Fe > V > Cr > Zn > Cu > Pb > Ni > Co for the Cretaceous and Paleogene/Neogene geophagic clays, respectively. Iron concentrations were significantly higher in Paleogene/Neogene geophagic clays than in Cretaceous geophagic clays. The nutritional value of Cu and Zn were lower whereas, Cr and Fe were higher than the recommended dietary intake. The index of geoaccumulation (0 < I ≤ 1) showed that the geophagic materials were uncontaminated to moderately contaminated by the trace elements. The overall hazard indices (HI) for non-carcinogenic effects showed that the geophagic clays pose threat to children (HI > 1) and no threat to adults (HI < 1) health. However, the carcinogenic risk indices (CRI) for Cr, Ni, and Pb were within acceptable cancer risks (10 < CRI < 10 ) for children and adults. Hence, based on the trace element s HI and CRI, this study concluded that the consumption of Cretaceous and Paleogene/Neogene geophagic kaolinitic clays poses no risks to adult health but children might suffer health risk if the geophagic clays are not beneficiated before ingestion.
机译：故意食用尘土是一种普遍公认的习惯，对健康的人有好处，也有危险。分别收集了十三（13）个样品，分别包含六（6）个白垩纪和七（7）个古近纪/新近纪地相高岭土材料，并分析了痕量元素的浓度（V，Cr，Co，Ni，Zn，Pb和Fe） ，以及对消费者健康的潜在风险。使用激光烧蚀电感耦合等离子体质谱法（LA-ICPMS）和X射线荧光光谱法（XRF）分析方法获得痕量元素组成。根据它们的平均浓度，分别对白垩纪和古近纪/新近纪地相粘土的Fe> V> Cr> Ni> Zn> Pb> Cu> Co和Fe> V> Cr> Zn> Cu> Pb> Ni>Co。古近纪/新近纪地相粘土中的铁含量明显高于白垩纪地相粘土。铜和锌的营养价值较低，而铬和铁的营养价值高于建议的饮食摄入量。地积累指数（0 1），对成人健康没有构成威胁（HI <1）。但是，对于儿童和成人，Cr，Ni和Pb的致癌风险指数（CRI）在可接受的癌症风险范围内（10

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