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Assessing Cd, Pb, Zn human bioaccessibility in smeltercontaminated agricultural topsoils (northern France)

机译:评估冶炼厂污染的农业表层土壤中Cd,Pb,Zn的人体生物利用度(法国北部)

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摘要

The extractability of Cd, Pb, and Zn was investigated in contaminated agricultural topsoils located in an area highly affected by the past atmospheric emissions of two smelters in northern France in order to assess their mobility and human bioaccessibility. The determination of Cd, Pb, and Zn bioaccessibility (Unified Barge Method, in vitro test) was made to evaluate the absolute trace element (TE) bioavailability. The results highlighted differences in bioaccessibility between Cd, Pb, and Zn (Cd > Pb > Zn). The mean values of the bioaccessible fractions of Cd, Pb, and Zn during the gastric phase were 82, 55, and 33%, respectively, of the pseudototal concentrations, whereas during the gastrointestinal phase, the bioaccessible fractions of metals decreased to 45, 20, and 10%, respectively. Stepwise multiple regression analysis showed that human bioaccessibility was affected by various physicochemical parameters (i.e., sand, carbonates, organic matter, assimilated P, free Al oxides, and pseudototal Fe contents). Sequential extractions were performed as an indication of the TE availability in these soils. Cadmium occurred in the more available fractions, Pb was mostly present as bound by oxides, and a significant contribution to the pseudototal Zn concentration was defined as the unavailable residual form related to the crystalline structures of minerals. The concepts of bioavailability and bioaccessibility are important for quantifying the risks associated with exposure to environmental pollutants and providing more realistic information for human health.
机译:在法国北部两个冶炼厂过去的大气排放严重影响的地区,对受污染的农业表层土壤中Cd,Pb和Zn的可萃取性进行了研究,以评估其迁移率和人类生物利用度。测定Cd,Pb和Zn的生物利用度(统一驳船法,体外测试)以评估绝对微量元素(TE)的生物利用度。结果突出了Cd,Pb和Zn之间的生物可及性差异(Cd> Pb> Zn)。胃阶段Cd,Pb和Zn的生物可及分数的平均值分别为假总浓度的82%,55%和33%,而在胃肠阶段,金属的生物可及分数降低至45、20 ,和10%。逐步多元回归分析表明,人类的生物可及性受到各种物理化学参数(例如,沙子,碳酸盐,有机物,同化的P,游离的Al氧化物和伪总Fe含量)的影响。进行了连续萃取以指示这些土壤中TE的有效性。镉以更多的可用馏分形式存在,Pb主要以氧化物的形式存在,并且对伪总Zn浓度的重大贡献定义为与矿物的晶体结构相关的不可利用的残留形式。生物利用度和生物利用度的概念对于量化与暴露于环境污染物有关的风险以及为人类健康提供更现实的信息非常重要。

著录项

  • 来源
    《Environmental Geochemistry and Health》 |2011年第5期|p.477-493|共17页
  • 作者单位

    Univ Lille Nord de France, 59000 Lille, France,Groupe ISA, Equipe Sols et Environnement, Laboratoire Genie Civil et geoEnvironnement Lille Nord de France, EA 4515, 48 boulevard Vauban, 59046 Lille Cedex, France;

    Univ Lille Nord de France, 59000 Lille, France,Groupe ISA, Equipe Sols et Environnement, Laboratoire Genie Civil et geoEnvironnement Lille Nord de France, EA 4515, 48 boulevard Vauban, 59046 Lille Cedex, France;

    Univ Lille Nord de France, 59000 Lille, France,UDSL, EA 4483, Impact de l'Environnement Chimique sur la Sante Humaine, 59000 Lille, France;

    Univ Lille Nord de France, 59000 Lille, France,UDSL, EA 4483, Impact de l'Environnement Chimique sur la Sante Humaine, 59000 Lille, France,CHULille, Service de Pathologie Professionnelle et Environnement, 59000 Lille, France;

    Univ Lille Nord de France, 59000 Lille, France,Groupe ISA, Equipe Sols et Environnement, Laboratoire Genie Civil et geoEnvironnement Lille Nord de France, EA 4515, 48 boulevard Vauban, 59046 Lille Cedex, France;

    Univ Lille Nord de France, 59000 Lille, France,Groupe ISA, Equipe Sols et Environnement, Laboratoire Genie Civil et geoEnvironnement Lille Nord de France, EA 4515, 48 boulevard Vauban, 59046 Lille Cedex, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    trace elements; contaminated soil; bioaccessibility; in vitro digestion; sequential extractions;

    机译:微量元素;受污染的土壤;生物可及性;体外消化顺序提取;
  • 入库时间 2022-08-17 13:28:20

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