Spatial Distribution of Elemental Concentrations in Street Dust of Hanoi, Vietnam.
Bull Environ Contam Toxicol
; 98(2): 277-282, 2017 Feb.
Article
em En
| MEDLINE
| ID: mdl-27995295
ABSTRACT
Street dust samples were collected at 163 locations across four different zones of Hanoi, Vietnam, covering different traffic and population densities. Samples were sieved into three fractions of different particle sizes and analyzed for elemental concentrations (K, Ca, Mn, Fe, Zn, Pb) using an X-ray fluorescence (XRF) instrument. The metal concentrations in street dust were compared among different sampling zones and with samples from background to evaluate the degree of pollution. The smallest size particle fraction (diameter <75 µm) contained higher concentrations of metals than the coarser ones (diameters = 75-180 and >180 µm). While concentrations of metals like Ca and Fe are spatially similar, concentrations of Pb and Zn in street dust varied between different zones, with the highest concentrations observed in dust from the downtown area, and lowest levels in the new suburb areas. Overall, compared to studies from cities in other countries, the mean concentration of Pb in street dust in Hanoi was relatively low, suggesting a lower risk to human health due to inhalation or ingestion of Pb-containing dust particles than in cities where Pb concentrations were several times higher.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Monitoramento Ambiental
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Poeira
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Material Particulado
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Metais
País/Região como assunto:
Asia
Idioma:
En
Revista:
Bull Environ Contam Toxicol
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Vietnã