TY - JOUR
T1 - Seasonal variation of heavy metals in ambient air and precipitation at a single site in Washington, DC
AU - Melaku, Samuel
AU - Morris, Vernon
AU - Raghavan, Dharmaraj
AU - Hosten, Charles
N1 - Funding Information:
We would like to thank the District of Columbia Water and Sewer Authority, Contract No. 05g-05-WQD04 and the NOAA EPP Program via Cooperative Agreement NA17AE1623 for financial support.
PY - 2008/9
Y1 - 2008/9
N2 - 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.
AB - 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.
KW - Ambient air
KW - Metals
KW - Wet deposition
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U2 - 10.1016/j.envpol.2007.10.038
DO - 10.1016/j.envpol.2007.10.038
M3 - Article
C2 - 18069104
AN - SCOPUS:46049088574
SN - 0269-7491
VL - 155
SP - 88
EP - 98
JO - Environmental Pollution
JF - Environmental Pollution
IS - 1
ER -