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Origin of Lead in the United States Diet

机译：美国饮食中铅的来源

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摘要

We report ~(208)Pb/~(207)Pb and ~(206)Pb/~(207)Pb ratios for 1001 duplicate diets collected from mothers and Children,1304 samples of house dust and hand wipes,and 64 samples of aerosols that were taken in Omaha,Nebraska,during the period from 1990 to 1997.A plot of ~(208)Pb/~(207)Pb versus ~(206)Pb/ ~(207)Pb for the dust and hand wipes indicates that they contain lead from ores mined in Idaho,Missouri,and Mexico.The absence of lead from Utah suggests that this mixture is not representative of the whole country.The lead in the aerosols has a narrower range of isotope ratios and resembles aerosols collected elsewhere in the United States.Most dietary collections contain a large component of house dust.Some,especially those from infants,are dominated by uranogenic lead with high ~(206)Pb/~(207)Pb ratios.Its source is taken to be calcium-supplemented food where the calcium is derived from limestone.Another source of lead is thorogenic and is ascribed to lead in tin coatings.Agricultural lead,whether from soil (estimated from recently published analyses of sedimentary materials),fertilizer,or agricultural lime,could not be unambiguously identified in the diets.Lead derived from aerosols,if present at all,is insignificant.
机译：我们报告了从母亲和儿童那里收集的1001份重复饮食中的〜（208）Pb /〜（207）Pb和〜（206）Pb /〜（207）Pb比率，1304个房屋灰尘和手巾样本以及64个气溶胶样本1990年至1997年期间在内布拉斯加州奥马哈市拍摄的尘埃和湿巾〜（20​​8）Pb /〜（207）Pb与〜（206）Pb /〜（207）Pb的关系图表明它们含有在爱达荷州，密苏里州和墨西哥开采的矿石中的铅。从犹他州缺少铅表明该混合物不能代表整个国家。气溶胶中的铅同位素范围较窄，类似于美国其他地方收集的气溶胶。在美国，大多数饮食中都含有大量的室内灰尘，特别是婴儿的食物中，尿素族铅占主导地位，尿铅含量较高（〜206）Pb /〜（207）Pb，其来源被认为是钙。钙是从石灰石中提取的补充食品。铅的另一种来源是生热的，归因于锡涂层中的铅。饮食中不能明确鉴定出土壤中的铅，无论是土壤（根据最近发表的对沉积物的分析估计），肥料还是农用石灰。源自气溶胶的铅（如果存在的话）微不足道。

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  • 来源
    《Environmental Science & Technology》 |2005年第22期|p.8995-9000|共6页
  • 作者

    WILLIAM I.MANTON; CAROL R.ANGLE; KAYE L.STANEK KROGSTRAND;

  • 作者单位

    Department of Geology,University of Texas at Dallas,Richardson,Texas,Department of Pediatrics,University of Nebraska Medical Center,Omaha,Nebraska,and Department of Nutrition Science,University of Nebraska at Omaha,Omaha,Nebraska;

    Department of Geology,University of Texas at Dallas,Richardson,Texas,Department of Pediatrics,University of Nebraska Medical Center,Omaha,Nebraska,and Department of Nutrition Science,University of Nebraska at Omaha,Omaha,Nebraska;

    Department of Geology,University of Texas at Dallas,Richardson,Texas,Department of Pediatrics,University of Nebraska Medical Center,Omaha,Nebraska,and Department of Nutrition Science,University of Nebraska at Omaha,Omaha,Nebraska;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);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 环境化学;
  • 关键词

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