The mobility and human oral bioaccessibility of Zn and Pb in urban dusts of Estarreja (N Portugal)
The mobility and human oral bioaccessibility of Zn and Pb in urban dusts of Estarreja (N Portugal)
复制标题
DOI：
10.1007/s10653-014-9634-3
复制
发表时间：
2015-02
影响因子：
4.2
通讯作者：
C. Patinha;A. Reis;Ana Cristina Andrade de Aguiar Dias;A. A. Abduljelil-A.;Yves Noack;Samuel Robert;M. Cave;E. F. D. Silva
中科院分区：
文献类型：
--
作者：
C. Patinha;A. Reis;Ana Cristina Andrade de Aguiar Dias;A. A. Abduljelil-A.;Yves Noack;Samuel Robert;M. Cave;E. F. D. Silva
从埃斯塔雷哈市（葡萄牙）收集了21份城市尘埃样本。这项工作的主要目的是评估通过口服摄入暴露途径从埃斯塔雷贾市获取的铅和锌粉尘样品的潜在可利用性，使用地球化学测试的组合：(a)使用顺序提取来确定构成粉尘的地球化学成分中铅和锌的分值；(b)体外生物可及性（BA）测量来确定哪些成分是生物可及性组分（Bf）的来源。采用电感耦合等离子体质谱法对样品中Pb和Zn的准总含量进行了分析，采用选择性顺序萃取法对元素固相分布进行了分析，并采用基于生理的萃取试验对这些元素的Bfs进行了分析。研究表明，锌的浓度高于铅，但两者都有位点特异性。序贯萃取试验表明，交换相和酸溶相是铅、锌的重要承载相。BA试验表明，总浓度中有很大一部分可被人体吸收（Pb为22.5% ~ 84.1%，Zn为28.7% ~ 86.3%）。
Twenty-one samples of urban dust were collected from Estarreja city (Portugal). The main objective of this work was to assess the potential availability of Pb and Zn present dust samples from Estarreja city via the oral ingestion exposure route using a combination of geochemical tests: (a) using sequential extraction to identify the fractionation of the Pb and Zn within the geochemical components that make up the dust and (b) in vitro bioaccessibility (BA) measurements to identify which components are the source(s) of the bioaccessible fraction (Bf). These samples were analysed for their quasi-total contents of Pb and Zn by inductively coupled plasma mass spectrometry, for their element solid-phase distribution using selective sequential extraction method and for the Bfs of these elements using a physiologically based extraction test. The study showed that the concentrations of Zn were higher than Pb, but both are site-specific. The sequential extraction test shows that the exchangeable and acid-soluble phases are important bearing phases for Pb and Zn. The BA test showed that a high proportion of the total concentration is available for absorption into the human body (ranges from 22.5 to 84.1 % for Pb and 28.7 to 86.3 % for Zn).