The Sulcis-Iglesiente district (SW Sardinia, Italy) has been, until recently, one of the most important Italian polymetallic mining areas for the extraction of lead. Epidemiological studies conducted over several decades have indicated this site at high risk of environmental crisis with possible adverse effects on the public health. In the present paper we discuss Pb isotope signatures in human scalp hair and road dust collected from the Sulcis-Iglesiente area in order to trace the exposure of populations to potential Pb sources. A total of 23 determinations (20 on hair samples and 3 on road dust samples) of lead isotope ratios (²⁰⁶Pb/²⁰⁷Pb and ²⁰⁸Pb/²⁰⁶Pb) were carried out. The obtained results were integrate with literature data regarding the total content of Pb in hair samples from the same study area. Hair from children living in Sant'Antioco exhibited lead isotope ratios in the ranges 1.152–1.165 for ²⁰⁶Pb/²⁰⁷Pb and 2.101–2.108 for ²⁰⁸Pb/²⁰⁶Pb, while hair samples from Iglesias resulted less radiogenic: ²⁰⁶Pb/²⁰⁷Pb ~ 1.147–1.154 and ²⁰⁸Pb/²⁰⁶Pb ~ 2.106–2.118. These values pointed to a multi-source mixing between the less radiogenic sources, corresponding to the Pb ore deposits, and the more radiogenic sources identified in local background.

中文翻译：

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人头皮头发中的铅同位素指纹：以伊格莱西亚斯矿区（意大利撒丁岛）为例

直到最近，Sulcis-Iglesiente区（意大利西南撒丁岛）一直是意大利最重要的铅提取多金属采矿区之一。数十年来进行的流行病学研究表明，该地点面临环境危机的高风险，可能对公共卫生产生不利影响。在本文中，我们讨论了从Sulcis-Iglesiente地区收集的人类头皮头发和道路扬尘中的Pb同位素特征，以追踪人群对潜在Pb来源的暴露。铅同位素比（²⁰⁶ Pb / ²⁰⁷ Pb和²⁰⁸ Pb / ^206的总共23个测定（毛发样品上20个，道路灰尘样品上3个）的测定Pb）。将获得的结果与有关来自同一研究区域的头发样品中Pb的总含量的文献数据进行整合。毛发从生活在位于Sant'Antioco孩子在范围为1.152-1.165表现出铅同位素比率²⁰⁶的Pb / ²⁰⁷ Pb和2.101-2.108为²⁰⁸的Pb / ²⁰⁶的Pb，而距离Iglesias头发样品导致更少放射：²⁰⁶的Pb / ²⁰⁷的Pb〜 1.147–1.154和²⁰⁸ Pb / ²⁰⁶ Pb〜2.106–2.118。这些值表明，与铅矿床相对应的放射源较少的放射源与在本地背景中识别出的放射源较多的放射源之间存在多源混合。