论文部分内容阅读
前人报告城市街道灰尘中平均铅含量在英国伯明罕为1,700ppm,巴西里约热内卢为700ppm,美国77个城市为1,500～2,000 ppm。为了测定儿童在城市正常环境中,可能接触的灰尘和污物的铅含量,并评价灰尘作为城市儿童摄入铅的一个来源的重要性,作者于1972年12月至1973年3月在曼彻斯特市中心周围10公里范围内,收集了350个灰尘样品(包括街道灰尘、污物或土壤表层、路面、路旁沟渠、公园儿童游戏场、小学游戏场、公园或荒地等),并在一个农村儿童游戏场和一个农村公园内收集了25个相同的样品以资比较。用原子吸收分光光度计测其铅含量。
Previous reports that the average lead content of dust in urban streets was 1,700ppm at Birmingham, England, 700ppm at Rio de Janeiro, Brazil and 1,500-2,000ppm at 77 cities in the United States. In order to determine the lead content of dust and contaminants that children may come into contact with in urban normal environments and to assess the importance of dust as a source of lead intake for urban children, the author, from December 1972 to March 1973, in Manchester A total of 350 dust samples (including street dust, dirt or soil surface, pavement, roadside ditches, park children’s playground, primary school playground, park or wasteland) were collected within 10 kilometers of the center and were collected in a rural child A total of 25 identical samples were collected from the playground and a rural park for comparison. The atomic absorption spectrophotometer to measure the lead content.