Linked Life Data

19520498

Source:http://linkedlifedata.com/resource/pubmed/id/19520498

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2-3
pubmed:dateCreated
2009-8-31
pubmed:abstractText
Thirty six PM(2.5) samples were collected at a roadside site of the heaviest traffic road in Qingdao, a coastal mega city in North China, from March 2004 to January 2005 to perform a detailed characterization of 16 priority polycyclic aromatic hydrocarbons (PAHs) proposed by the USEPA and n-alkanes. For PAHs, the significant increase in winter was observed with average PAH level of 32.3, 11.5, 48.9 and 263 ng m(-3) for spring, summer, autumn and winter, respectively. The average concentrations of n-alkane in PM(2.5) at ground level were 232, 121, 309 and 369 ng m(-3) in spring, summer, autumn, and winter, respectively. The pyrogenic PAHs were mainly from the coal burning, and the liquid fossil fuel combustion was their second contribution even at the roadside of a busy street with heavy traffic in Qingdao. Petroleum residues were the dominant source for the n-alkanes. Principal component analysis results indicated that all the measured PAHs but naphthalene and those C17-C26 n-alkanes could be attributed to the fossil fuel burning while long-chain n-alkanes (C27-C35) were mainly derived from higher plant waxes. Good correlations between PAHs and n-alkanes in summer, autumn and winter suggested that they were mainly from local sources. The poor correlation of n-alkanes and PAHs in spring could be mainly due to the shift from the space heating season to non-heating season during the sampling period. This work indicated that the roadside environment in Qingdao was more deteriorated compared with non-roadside environment in other mega cities in China.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
1873-3336
pubmed:author
pubmed:issnType
Electronic
pubmed:day
30
pubmed:volume
170
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
888-94
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Occurrence and sources of polycyclic aromatic hydrocarbons and n-alkanes in PM(2.5) in the roadside environment of a major city in China.
pubmed:affiliation
Department of Environmental Science and Engineering, Center for Atmospheric Chemistry Study, Fudan University, Shanghai 200433, China. guozgg@fudan.edu.cn
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't