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Long-Term in Situ Reduction in Soil Lead Bioavailability Measured in a Mouse Model

机译：在小鼠模型中测得的土壤铅生物利用度的长期降低

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摘要

Effects of different treatments on the bioavailability of lead (Pb) in soil from a smelter emission contaminated site in Joplin, Missouri, were evaluated in a mouse model. Similar estimates of relative bioavailability for Pb in untreated or treated soil were obtained in mice and in the well-established juvenile swine model. In the mouse model, treatments that used phosphate (phosphoric acid or triple superphosphate) combined with iron oxide or biosolids compost significantly reduced soil Pb bioavailability. Notably, effects of these remediation procedures were persistent, given that up to 16 years had elapsed between soil treatment and sample collection. Remediation of soils was associated with changes in Pb species present in soil. Differences in Pb species in ingested soil and in feces from treated mice indicated that changes in Pb speciation occurred during transit through the gastrointestinal tract. Use of the mouse model facilitates evaluation of remediation procedures and allows monitoring of the performance of procedures under laboratory and field conditions.
机译：在小鼠模型中，评估了不同处理对密苏里州乔普林市熔炉排放污染场所土壤中铅（Pb）生物利用度的影响。在小鼠和成熟的猪模型中，未处理或处理过的土壤中铅的相对生物利用度的估算值相似。在小鼠模型中，将磷酸盐（磷酸或三重过磷酸钙）与氧化铁或生物固体堆肥结合使用的处理显着降低了土壤铅的生物利用度。值得注意的是，这些补救措施的效果是持久的，因为从土壤处理到样品采集之间已经过去了16年之久。土壤修复与土壤中Pb物种的变化有关。摄入的土壤中和处理过的小鼠粪便中的Pb种类不同，表明Pb的形态发生在通过胃肠道的过程中。鼠标模型的使用有助于评估补救程序，并允许在实验室和现场条件下监控程序的性能。

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  • 来源
    《Environmental Science & Technology》 |2018年第23期|13908-13913|共6页
  • 作者

    Bradham Karen D.; Diamond Gary L.; Nelson Clay M.; Noerpel Matt; Scheckel Kirk G.; Elek Brittany; Chaney Rufus L.; Ma Qing; Thomas David J.;

  • 作者单位

    SRC Inc, New York, NY 13212 USA;

    US EPA, Pharmacokinet Branch, Integrated Syst Toxicol Div, Natl Hlth & Environm Effects Lab,ORD, Res Triangle Pk, NC 27709 USA;

    USDA ARS Adapt Cropping Syst Lab, Beltsville, MD 20705 USA;

    Northwestern Univ, DND CAT, Synchrotron Res Ctr, Adv Photon Source, Argonne, IL 60439 USA;

    US EPA, Off Res & Dev, Cincinnati, OH 45224 USA;

    US EPA, Off Res & Dev, Res Triangle Pk, NC 27711 USA;

  • 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);
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  • 正文语种 eng
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