Chemical speciation of fine particle bound trace metals
This study reported quantifications of fine particle bound trace metals and their potential health risks for residents in Guangzhou, a rapidly developing and most populated city in South China. The fine particle samples were collected from October 29th. to November 8th. of 2006 at two different elev...
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Published in | International journal of environmental science and technology (Tehran) Vol. 6; no. 3; pp. 337 - 346 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Iran
Center for Environment and Energy Research and Studies (CEERS)
2009
Springer-Verlag Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | This study reported quantifications of fine particle bound trace metals
and their potential health risks for residents in Guangzhou, a rapidly
developing and most populated city in South China. The fine particle
samples were collected from October 29th. to November 8th. of 2006 at
two different elevations in a mainly residential area and analyzed for
the total concentration of aluminum, iron, zinc, lead, manganese,
copper, arsenic, chromium, nickel, cadmium, molybdenum and cobalt.
Results showed that the fine particle concentrations ranged from 95.8
µg/m3to 194.7 µg/m3 at the ground and 83.3-190.0 µg/m3
on the roof, which were much higher than the 24 h fine particle
standard (35 µg/m3) recommended by USEPA. The total concentrations
of zinc, lead, arsenic, chromium and cadmium in fine particle were
504.8, 201.6, 24.3, 7.7 and 4.4 ng/m3, respectively, which were
comparable to other major cities of China, but much higher than major
cities outside of China. A sequential extraction procedure was used to
fractionate these fine particle bound metals into four different
fractions. Results indicated that most toxic metals were mainly
distributed in bioavailable fractions. For instance, about 91 % of
cadmium, 85 % of lead and 74 % of arsenic were in bioavailable forms.
Risk calculations with a simple exposure assessment model showed that
the cancer risks of the bioavailable fractions of arsenic, chromium and
cadmium were 3 to 33 times greater than usual goal, indicating serious
health risks to the residents in this urban area. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 1735-1472 1735-2630 |
DOI: | 10.1007/BF03326071 |