کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4426972 | 1309141 | 2008 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Seasonal variation of heavy metals in ambient air and precipitation at a single site in Washington, DC Seasonal variation of heavy metals in ambient air and precipitation at a single site in Washington, DC](/preview/png/4426972.png)
Atmospheric samples of precipitation and ambient air were collected at a single site in Washington, DC, for 7 months (for ambient air samples) and 1 year (for wet deposition samples) and analyzed for arsenic, cadmium, chromium and lead. The ranges of heavy metal concentrations for 6-day wet deposition samples collected over the 1-year period were 0.20–1.3 μg/l, 0.060–5.1 μg/l, 0.062–4.6 μg/l and 0.11–3.2 μg/l for arsenic, cadmium, chromium and lead, respectively, with a precision better than 5% for more than 95% of the measurements. The ranges of heavy metal concentrations for the 6-day ambient air samples were 0.800–15.7 ng/m3, 1.50–30.0 ng/m3, 16.8–112 ng/m3, and 2.90–137 ng/m3 for arsenic, cadmium, chromium and lead, respectively, with a precision better than 10%. The spread in the heavy metal concentration over the observation period suggests a high seasonal variability for heavy metal content in both ambient air and wet deposition samples.
Journal: Environmental Pollution - Volume 155, Issue 1, September 2008, Pages 88–98