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Collateral benefits and hidden hazards of soil arsenic during abatement assessment of residential lead hazards

机译：减少居民铅危害过程中土壤砷的附带效益和潜在危害

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Abatement of soil-lead hazards may also reduce human exposure to other soil toxins, thereby achieving significant collateral benefits that are not accounted for today. This proposition was tested with the specific case of soil-arsenic, where 1726 residential soil samples were collected and analyzed for lead and arsenic. The study found that these two toxins coexisted in most samples, but their concentrations were weakly correlated, reflecting the differing sources for each toxin. Collateral benefits of 9% would be achieved during abatement of the lead-contaminated soils having elevated arsenic concentrations. However, a hidden hazard of 16% was observed by overlooking elevated arsenic concentrations in soils having lead concentrations not requiring abatement. This study recommends that soil samples collected under HUD programs should be collected from areas of lead and arsenic deposition and tested for arsenic as well as lead, and that soil abatement decisions consider soil-arsenic as well as soil-lead guidelines.
机译：减少土壤铅的危害也可以减少人类接触其他土壤毒素的机会，从而获得当今尚无法解决的重大附带利益。该命题是在土壤砷的特定情况下进行测试的，在该案例中，收集了1726个住宅土壤样品并分析了铅和砷。研究发现，这两种毒素在大多数样品中共存，但它们的浓度相关性较弱，反映出每种毒素的来源不同。在减少砷浓度升高的铅污染土壤期间，可以实现9％的附带效益。但是，通过忽略铅浓度不需要减少的土壤中砷浓度的升高，发现了16％的隐患。这项研究建议在HUD计划下收集的土壤样品应从铅和砷沉积的区域收集，并测试砷和铅的含量，减少土壤污染的决策应考虑土壤砷和土壤铅的指导原则。

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