文章基本信息

标题：LEAD DISTRIBUTION BY URBAN SEDIMENTS ON IMPERMEABLE AREAS OF PORTO ALEGRE - RS, BRAZIL
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作者：Leidy L.G. Martínez ; Cristiano Poleto
期刊名称：Journal of Urban and Environmental Engineering
印刷版ISSN：1982-3932
电子版ISSN：1982-3932
出版年度：2010
卷号：4
期号：1
页码：1-8
语种：English
出版社：Universidade Federal da Paraíba
其他摘要：Heavy metals, like lead (Pb), are subproducts of industrial activities; however, in recent years, studies have shown that even in non-industrial areas, elevated concentrations of this element have been found. In this study, Pb concentrations were measured in 20 composite samples of urban sediments collected in an urban watershed of 4.85 km² with three types of soil use (commercial/residential, commercial and industrial) in the city of Porto Alegre, RS, Brazil. Concentrations were determined by acid digestion (EPA 3050) of the 209 ìm, 150 ìm, 90 ìm, 63 ìm and 45 ìm fractions followed by atomic emission spectrophotometry with inductively coupled plasma. Average values of 178.1 ìg.g-1 (± 332); 226.5 ìg.g-1 (± 500); 245.2 ìg.g-1 (± 454.1); 272.4 ìg.g-1 (± 497.3) and 251.5 ìg.g-1 (± 322.6) were obtained in the 209, 150, 90, 63 and 45 ìm fractions, respectively. Concentrations of the metals studied were interpolated and represented geographically using Idrisi© Andes. Results show that the greatest concentrations are located in the commercial part of the study area, characterized as presenting high vehicle flow most of the day, with this being considered a potential source of lead. All concentrations were above that of the local background. Studies of this type are important because they make the establishment of control targets possible within sustainable management of water resources, allowing inferences regarding future pollution scenarios of local water resources.
关键词：Urban sediment; diffuse pollution; GIS; lead
其他关键词：Urban sediment; diffuse pollution; GIS; lead.