Elless M P, Ferguson B W, Bray C A, Patch S, Mielke H, Blaylock M J
Edenspace Systems Corporation, 3810 Concorde Parkway, Suite 100, Dulles, VA 20151-1131, USA.
Environ Pollut. 2008 Nov;156(1):20-8. doi: 10.1016/j.envpol.2008.01.020. Epub 2008 Mar 6.
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.
减少土壤铅危害也可能降低人类对其他土壤毒素的接触，从而带来目前未被考虑到的显著附带效益。这一观点在土壤砷的具体案例中得到了验证，在该案例中，收集了1726份住宅土壤样本，并对其中的铅和砷进行了分析。研究发现，这两种毒素在大多数样本中同时存在，但它们的浓度相关性较弱，这反映了每种毒素来源不同。在治理砷浓度升高的铅污染土壤过程中，将实现9%的附带效益。然而，通过忽略铅浓度无需治理的土壤中升高的砷浓度，发现了16%的潜在危害。本研究建议，根据美国住房和城市发展部（HUD）项目采集的土壤样本应从铅和砷沉积区域采集，并同时检测砷和铅，而且土壤治理决策应考虑土壤砷以及土壤铅的指导标准。
