Department of Chemistry, Tulane University, New Orleans, LA 70118, USA.
Environ Pollut. 2011 Aug-Sep;159(8-9):2071-7. doi: 10.1016/j.envpol.2010.11.008. Epub 2010 Dec 4.
The feasibility of reducing children's exposure to lead (Pb) polluted soil in New Orleans is tested. Childcare centers (median = 48 children) are often located in former residences. The extent of soil Pb was determined by selecting centers in both the core and outlying areas. The initial 558 mg/kg median soil Pb (range 14-3692 mg/kg) decreased to median 4.1 mg/kg (range 2.2-26.1 mg/kg) after intervention with geotextile covered by 15 cm of river alluvium. Pb loading decreased from a median of 4887 μg/m(2) (454 μg/ft(2)) range 603-56650 μg/m(2) (56-5263 μg/ft(2)) to a median of 398 μg/m(2) (37 μg/ft(2)) range 86-980 μg/m(2) (8-91 μg/ft(2)). Multi-Response Permutation Procedures indicate similar (P-values = 0.160-0.231) soil Pb at childcare centers compared to soil Pb of nearby residential communities. At ∼$100 per child, soil Pb and surface loading were reduced within hours, advancing an upstream intervention conceptualization about Pb exposure prevention.
测试了在新奥尔良减少儿童接触含铅 (Pb) 污染土壤的可行性。儿童保育中心（中位数=48 名儿童）通常位于以前的住所。通过在核心区和外围区选择中心，确定了土壤中 Pb 的程度。最初的 558mg/kg 中位数土壤 Pb（范围 14-3692mg/kg）在经过土工织物覆盖 15cm 河冲积物的干预后，降低到中位数 4.1mg/kg（范围 2.2-26.1mg/kg）。Pb 负荷从中位数 4887μg/m(2)（454μg/ft(2)）范围 603-56650μg/m(2)（56-5263μg/ft(2)）降低到中位数 398μg/m(2)（37μg/ft(2)）范围 86-980μg/m(2)（8-91μg/ft(2)）。多元响应置换程序表明，儿童保育中心的土壤 Pb 与附近居民区的土壤 Pb 相似（P 值=0.160-0.231）。每个孩子花费约 100 美元，几小时内就降低了土壤 Pb 和表面负荷，推进了关于 Pb 暴露预防的上游干预概念。
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