Abel Michael T, Presley Steven M, Rainwater Thomas R, Austin Galen P, Cox Stephen B, McDaniel Les N, Marsland Eric J, Leftwich Blair D, Anderson Todd A, Kendall Ronald J, Cobb George P
Department of Environmental Toxicology, The Institute of Environmental and Human Health, Texas Tech University, Box 41163, Lubbock, Texas 79409-1163, USA.
Environ Toxicol Chem. 2007 Oct;26(10):2108-14. doi: 10.1897/06-595R.1.
During January 2006, soil and sediment samples from 75 sites in the New Orleans (LA, USA) area were collected and tested for 26 inorganic elements. The study design was intended to provide a spatial pattern of metal concentrations within the city following hurricanes Katrina and Rita. The sampling design included four transects that traversed the city in a north-south direction and three transects that traversed the city in an east-west direction. Contaminant concentrations were determined at multiple sites within each transect and compared to U.S. Environmental Protection Agency soil screening criteria pertaining to human health. Concentrations of Pb and As exceeded the criteria indiscriminately throughout the city. Of the 75 sites, 14 (19%) exceeded the soil screening criteria for Pb, and 73 (97%) exceeded the criteria for As. Forty-three of the 75 sites coincided with a previous sampling event in October 2005. Metal concentrations were evaluated for temporal comparisons using a pair sampled t test. Arsenic concentrations differed significantly over time, but Pb concentrations did not.
2006年1月期间，在美国路易斯安那州新奥尔良地区的75个地点采集了土壤和沉积物样本，并对26种无机元素进行了检测。该研究设计旨在呈现卡特里娜飓风和丽塔飓风过后该市金属浓度的空间分布情况。采样设计包括四条南北向贯穿城市的样带和三条东西向贯穿城市的样带。在每个样带内的多个地点测定污染物浓度，并与美国环境保护局关于人类健康的土壤筛选标准进行比较。全市范围内，铅和砷的浓度均无差别地超过了标准。在这75个地点中，14个（19%）超过了铅的土壤筛选标准，73个（97%）超过了砷的标准。75个地点中有43个与2005年10月的一次先前采样点重合。使用配对样本t检验对金属浓度进行时间比较评估。砷浓度随时间有显著差异，但铅浓度没有。
