表层土壤是幼儿铅暴露的潜在来源。
Surface soil as a potential source of lead exposure for young children.
作者信息
Schmitt N, Philion J J, Larsen A A, Harnadek M, Lynch A J
出版信息
Can Med Assoc J. 1979 Dec 8;121(11):1474-8.
Abstract
Soil analyses revealed an elevated lead content in the surface soil of three British Columbia cities. The lead accumulations were largely attributed to dustfall from a nearby large lead-zinc smelter in Trail and to automotive traffic in Nelson and Vancouver. Although the mean concentrations of lead in the soil were relatively low at Nelson (192 parts per million [ppm]), in selected areas of Vancouver with heavy traffic they were similar to those found within 1.6 km of the large smelter at Trail (1545 and 1662 ppm respectively). In a study conducted in 1975, children aged 1 to 6 years in Trail and Nelson were found to have higher mean blood lead levels than grade nine students. The findings of the later study support the view that particulate lead in surface soil and dust accounted for most of the greater lead absorption in the younger children.
摘要
土壤分析显示，不列颠哥伦比亚省的三个城市表层土壤中的铅含量有所升高。铅的累积主要归因于特雷尔附近一家大型铅锌冶炼厂的降尘，以及尼尔森和温哥华的汽车交通。尽管尼尔森土壤中的铅平均浓度相对较低（百万分之192 [ppm]），但在温哥华交通繁忙的特定区域，其铅浓度与特雷尔大型冶炼厂1.6公里范围内的铅浓度相似（分别为1545 ppm和1662 ppm）。在1975年进行的一项研究中，发现特雷尔和尼尔森1至6岁儿童的平均血铅水平高于九年级学生。后来这项研究的结果支持了这样一种观点，即表层土壤和灰尘中的颗粒铅是年幼儿童铅吸收量增加的主要原因。
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